2365 lines
76 KiB
JavaScript
2365 lines
76 KiB
JavaScript
/***********************************************************************
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A JavaScript tokenizer / parser / beautifier / compressor.
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https://github.com/mishoo/UglifyJS2
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-------------------------------- (C) ---------------------------------
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Author: Mihai Bazon
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<mihai.bazon@gmail.com>
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http://mihai.bazon.net/blog
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Distributed under the BSD license:
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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***********************************************************************/
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"use strict";
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import {
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defaults,
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makePredicate,
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noop,
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regexp_source_fix,
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sort_regexp_flags,
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return_false,
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return_true,
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} from "./utils/index.js";
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import { first_in_statement, left_is_object } from "./utils/first_in_statement.js";
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import {
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AST_Array,
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AST_Arrow,
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AST_Assign,
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AST_Await,
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AST_BigInt,
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AST_Binary,
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AST_BlockStatement,
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AST_Break,
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AST_Call,
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AST_Case,
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AST_Catch,
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AST_Chain,
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AST_Class,
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AST_ClassExpression,
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AST_ClassPrivateProperty,
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AST_ClassProperty,
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AST_ConciseMethod,
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AST_PrivateGetter,
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AST_PrivateMethod,
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AST_PrivateSetter,
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AST_Conditional,
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AST_Const,
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AST_Constant,
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AST_Continue,
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AST_Debugger,
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AST_Default,
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AST_DefaultAssign,
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AST_Definitions,
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AST_Defun,
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AST_Destructuring,
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AST_Directive,
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AST_Do,
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AST_Dot,
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AST_DotHash,
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AST_EmptyStatement,
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AST_Exit,
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AST_Expansion,
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AST_Export,
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AST_Finally,
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AST_For,
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AST_ForIn,
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AST_ForOf,
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AST_Function,
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AST_Hole,
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AST_If,
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AST_Import,
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AST_ImportMeta,
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AST_Jump,
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AST_LabeledStatement,
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AST_Lambda,
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AST_Let,
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AST_LoopControl,
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AST_NameMapping,
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AST_New,
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AST_NewTarget,
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AST_Node,
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AST_Number,
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AST_Object,
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AST_ObjectGetter,
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AST_ObjectKeyVal,
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AST_ObjectProperty,
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AST_ObjectSetter,
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AST_PrefixedTemplateString,
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AST_PropAccess,
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AST_RegExp,
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AST_Return,
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AST_Scope,
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AST_Sequence,
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AST_SimpleStatement,
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AST_Statement,
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AST_StatementWithBody,
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AST_String,
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AST_Sub,
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AST_Super,
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AST_Switch,
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AST_SwitchBranch,
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AST_Symbol,
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AST_SymbolClassProperty,
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AST_SymbolMethod,
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AST_SymbolRef,
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AST_TemplateSegment,
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AST_TemplateString,
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AST_This,
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AST_Throw,
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AST_Toplevel,
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AST_Try,
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AST_Unary,
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AST_UnaryPostfix,
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AST_UnaryPrefix,
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AST_Var,
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AST_VarDef,
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AST_While,
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AST_With,
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AST_Yield,
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TreeWalker,
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walk,
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walk_abort
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} from "./ast.js";
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import {
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get_full_char_code,
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get_full_char,
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is_identifier_char,
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is_basic_identifier_string,
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is_identifier_string,
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PRECEDENCE,
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ALL_RESERVED_WORDS,
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} from "./parse.js";
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const EXPECT_DIRECTIVE = /^$|[;{][\s\n]*$/;
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const CODE_LINE_BREAK = 10;
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const CODE_SPACE = 32;
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const r_annotation = /[@#]__(PURE|INLINE|NOINLINE)__/g;
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function is_some_comments(comment) {
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// multiline comment
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return (
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(comment.type === "comment2" || comment.type === "comment1")
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&& /@preserve|@copyright|@lic|@cc_on|^\**!/i.test(comment.value)
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);
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}
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class Rope {
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constructor() {
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this.committed = "";
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this.current = "";
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}
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append(str) {
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this.current += str;
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}
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insertAt(char, index) {
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const { committed, current } = this;
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if (index < committed.length) {
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this.committed = committed.slice(0, index) + char + committed.slice(index);
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} else if (index === committed.length) {
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this.committed += char;
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} else {
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index -= committed.length;
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this.committed += current.slice(0, index) + char;
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this.current = current.slice(index);
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}
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}
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charAt(index) {
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const { committed } = this;
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if (index < committed.length) return committed[index];
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return this.current[index - committed.length];
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}
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curLength() {
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return this.current.length;
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}
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length() {
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return this.committed.length + this.current.length;
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}
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toString() {
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return this.committed + this.current;
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}
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}
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function OutputStream(options) {
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var readonly = !options;
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options = defaults(options, {
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ascii_only : false,
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beautify : false,
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braces : false,
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comments : "some",
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ecma : 5,
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ie8 : false,
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indent_level : 4,
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indent_start : 0,
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inline_script : true,
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keep_numbers : false,
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keep_quoted_props : false,
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max_line_len : false,
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preamble : null,
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preserve_annotations : false,
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quote_keys : false,
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quote_style : 0,
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safari10 : false,
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semicolons : true,
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shebang : true,
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shorthand : undefined,
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source_map : null,
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webkit : false,
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width : 80,
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wrap_iife : false,
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wrap_func_args : true,
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_destroy_ast : false
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}, true);
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if (options.shorthand === undefined)
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options.shorthand = options.ecma > 5;
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// Convert comment option to RegExp if neccessary and set up comments filter
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var comment_filter = return_false; // Default case, throw all comments away
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if (options.comments) {
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let comments = options.comments;
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if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) {
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var regex_pos = options.comments.lastIndexOf("/");
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comments = new RegExp(
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options.comments.substr(1, regex_pos - 1),
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options.comments.substr(regex_pos + 1)
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);
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}
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if (comments instanceof RegExp) {
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comment_filter = function(comment) {
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return comment.type != "comment5" && comments.test(comment.value);
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};
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} else if (typeof comments === "function") {
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comment_filter = function(comment) {
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return comment.type != "comment5" && comments(this, comment);
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};
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} else if (comments === "some") {
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comment_filter = is_some_comments;
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} else { // NOTE includes "all" option
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comment_filter = return_true;
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}
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}
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var indentation = 0;
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var current_col = 0;
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var current_line = 1;
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var current_pos = 0;
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var OUTPUT = new Rope();
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let printed_comments = new Set();
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var to_utf8 = options.ascii_only ? function(str, identifier = false, regexp = false) {
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if (options.ecma >= 2015 && !options.safari10 && !regexp) {
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str = str.replace(/[\ud800-\udbff][\udc00-\udfff]/g, function(ch) {
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var code = get_full_char_code(ch, 0).toString(16);
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return "\\u{" + code + "}";
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});
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}
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return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
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var code = ch.charCodeAt(0).toString(16);
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if (code.length <= 2 && !identifier) {
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while (code.length < 2) code = "0" + code;
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return "\\x" + code;
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} else {
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while (code.length < 4) code = "0" + code;
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return "\\u" + code;
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}
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});
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} : function(str) {
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return str.replace(/[\ud800-\udbff][\udc00-\udfff]|([\ud800-\udbff]|[\udc00-\udfff])/g, function(match, lone) {
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if (lone) {
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return "\\u" + lone.charCodeAt(0).toString(16);
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}
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return match;
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});
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};
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function make_string(str, quote) {
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var dq = 0, sq = 0;
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str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
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function(s, i) {
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switch (s) {
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case '"': ++dq; return '"';
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case "'": ++sq; return "'";
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case "\\": return "\\\\";
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case "\n": return "\\n";
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case "\r": return "\\r";
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case "\t": return "\\t";
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case "\b": return "\\b";
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case "\f": return "\\f";
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case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
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case "\u2028": return "\\u2028";
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case "\u2029": return "\\u2029";
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case "\ufeff": return "\\ufeff";
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case "\0":
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return /[0-9]/.test(get_full_char(str, i+1)) ? "\\x00" : "\\0";
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}
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return s;
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});
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function quote_single() {
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return "'" + str.replace(/\x27/g, "\\'") + "'";
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}
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function quote_double() {
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return '"' + str.replace(/\x22/g, '\\"') + '"';
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}
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function quote_template() {
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return "`" + str.replace(/`/g, "\\`") + "`";
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}
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str = to_utf8(str);
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if (quote === "`") return quote_template();
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switch (options.quote_style) {
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case 1:
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return quote_single();
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case 2:
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return quote_double();
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case 3:
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return quote == "'" ? quote_single() : quote_double();
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default:
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return dq > sq ? quote_single() : quote_double();
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}
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}
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function encode_string(str, quote) {
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var ret = make_string(str, quote);
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if (options.inline_script) {
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ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2");
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ret = ret.replace(/\x3c!--/g, "\\x3c!--");
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ret = ret.replace(/--\x3e/g, "--\\x3e");
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}
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return ret;
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}
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function make_name(name) {
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name = name.toString();
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name = to_utf8(name, true);
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return name;
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}
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function make_indent(back) {
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return " ".repeat(options.indent_start + indentation - back * options.indent_level);
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}
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/* -----[ beautification/minification ]----- */
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var has_parens = false;
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var might_need_space = false;
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var might_need_semicolon = false;
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var might_add_newline = 0;
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var need_newline_indented = false;
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var need_space = false;
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var newline_insert = -1;
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var last = "";
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var mapping_token, mapping_name, mappings = options.source_map && [];
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var do_add_mapping = mappings ? function() {
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mappings.forEach(function(mapping) {
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try {
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let { name, token } = mapping;
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if (token.type == "name" || token.type === "privatename") {
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name = token.value;
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} else if (name instanceof AST_Symbol) {
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name = token.type === "string" ? token.value : name.name;
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}
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options.source_map.add(
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mapping.token.file,
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mapping.line, mapping.col,
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mapping.token.line, mapping.token.col,
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is_basic_identifier_string(name) ? name : undefined
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);
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} catch(ex) {
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// Ignore bad mapping
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}
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});
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mappings = [];
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} : noop;
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var ensure_line_len = options.max_line_len ? function() {
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if (current_col > options.max_line_len) {
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if (might_add_newline) {
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OUTPUT.insertAt("\n", might_add_newline);
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const curLength = OUTPUT.curLength();
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if (mappings) {
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var delta = curLength - current_col;
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mappings.forEach(function(mapping) {
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mapping.line++;
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mapping.col += delta;
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});
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}
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current_line++;
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current_pos++;
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current_col = curLength;
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}
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}
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if (might_add_newline) {
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might_add_newline = 0;
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do_add_mapping();
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}
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} : noop;
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var requireSemicolonChars = makePredicate("( [ + * / - , . `");
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function print(str) {
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str = String(str);
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var ch = get_full_char(str, 0);
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if (need_newline_indented && ch) {
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need_newline_indented = false;
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if (ch !== "\n") {
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print("\n");
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indent();
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}
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}
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if (need_space && ch) {
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need_space = false;
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if (!/[\s;})]/.test(ch)) {
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space();
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}
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}
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newline_insert = -1;
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var prev = last.charAt(last.length - 1);
|
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if (might_need_semicolon) {
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might_need_semicolon = false;
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if (prev === ":" && ch === "}" || (!ch || !";}".includes(ch)) && prev !== ";") {
|
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if (options.semicolons || requireSemicolonChars.has(ch)) {
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OUTPUT.append(";");
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current_col++;
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current_pos++;
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} else {
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ensure_line_len();
|
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if (current_col > 0) {
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OUTPUT.append("\n");
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current_pos++;
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current_line++;
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current_col = 0;
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}
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|
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if (/^\s+$/.test(str)) {
|
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// reset the semicolon flag, since we didn't print one
|
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// now and might still have to later
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might_need_semicolon = true;
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}
|
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}
|
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|
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if (!options.beautify)
|
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might_need_space = false;
|
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}
|
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}
|
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|
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if (might_need_space) {
|
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if ((is_identifier_char(prev)
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&& (is_identifier_char(ch) || ch == "\\"))
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|| (ch == "/" && ch == prev)
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|| ((ch == "+" || ch == "-") && ch == last)
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) {
|
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OUTPUT.append(" ");
|
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current_col++;
|
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current_pos++;
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}
|
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might_need_space = false;
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}
|
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|
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if (mapping_token) {
|
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mappings.push({
|
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token: mapping_token,
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name: mapping_name,
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line: current_line,
|
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col: current_col
|
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});
|
|
mapping_token = false;
|
|
if (!might_add_newline) do_add_mapping();
|
|
}
|
|
|
|
OUTPUT.append(str);
|
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has_parens = str[str.length - 1] == "(";
|
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current_pos += str.length;
|
|
var a = str.split(/\r?\n/), n = a.length - 1;
|
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current_line += n;
|
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current_col += a[0].length;
|
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if (n > 0) {
|
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ensure_line_len();
|
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current_col = a[n].length;
|
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}
|
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last = str;
|
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}
|
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|
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var star = function() {
|
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print("*");
|
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};
|
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|
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var space = options.beautify ? function() {
|
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print(" ");
|
|
} : function() {
|
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might_need_space = true;
|
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};
|
|
|
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var indent = options.beautify ? function(half) {
|
|
if (options.beautify) {
|
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print(make_indent(half ? 0.5 : 0));
|
|
}
|
|
} : noop;
|
|
|
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var with_indent = options.beautify ? function(col, cont) {
|
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if (col === true) col = next_indent();
|
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var save_indentation = indentation;
|
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indentation = col;
|
|
var ret = cont();
|
|
indentation = save_indentation;
|
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return ret;
|
|
} : function(col, cont) { return cont(); };
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|
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var newline = options.beautify ? function() {
|
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if (newline_insert < 0) return print("\n");
|
|
if (OUTPUT.charAt(newline_insert) != "\n") {
|
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OUTPUT.insertAt("\n", newline_insert);
|
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current_pos++;
|
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current_line++;
|
|
}
|
|
newline_insert++;
|
|
} : options.max_line_len ? function() {
|
|
ensure_line_len();
|
|
might_add_newline = OUTPUT.length();
|
|
} : noop;
|
|
|
|
var semicolon = options.beautify ? function() {
|
|
print(";");
|
|
} : function() {
|
|
might_need_semicolon = true;
|
|
};
|
|
|
|
function force_semicolon() {
|
|
might_need_semicolon = false;
|
|
print(";");
|
|
}
|
|
|
|
function next_indent() {
|
|
return indentation + options.indent_level;
|
|
}
|
|
|
|
function with_block(cont) {
|
|
var ret;
|
|
print("{");
|
|
newline();
|
|
with_indent(next_indent(), function() {
|
|
ret = cont();
|
|
});
|
|
indent();
|
|
print("}");
|
|
return ret;
|
|
}
|
|
|
|
function with_parens(cont) {
|
|
print("(");
|
|
//XXX: still nice to have that for argument lists
|
|
//var ret = with_indent(current_col, cont);
|
|
var ret = cont();
|
|
print(")");
|
|
return ret;
|
|
}
|
|
|
|
function with_square(cont) {
|
|
print("[");
|
|
//var ret = with_indent(current_col, cont);
|
|
var ret = cont();
|
|
print("]");
|
|
return ret;
|
|
}
|
|
|
|
function comma() {
|
|
print(",");
|
|
space();
|
|
}
|
|
|
|
function colon() {
|
|
print(":");
|
|
space();
|
|
}
|
|
|
|
var add_mapping = mappings ? function(token, name) {
|
|
mapping_token = token;
|
|
mapping_name = name;
|
|
} : noop;
|
|
|
|
function get() {
|
|
if (might_add_newline) {
|
|
ensure_line_len();
|
|
}
|
|
return OUTPUT.toString();
|
|
}
|
|
|
|
function has_nlb() {
|
|
const output = OUTPUT.toString();
|
|
let n = output.length - 1;
|
|
while (n >= 0) {
|
|
const code = output.charCodeAt(n);
|
|
if (code === CODE_LINE_BREAK) {
|
|
return true;
|
|
}
|
|
|
|
if (code !== CODE_SPACE) {
|
|
return false;
|
|
}
|
|
n--;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
function filter_comment(comment) {
|
|
if (!options.preserve_annotations) {
|
|
comment = comment.replace(r_annotation, " ");
|
|
}
|
|
if (/^\s*$/.test(comment)) {
|
|
return "";
|
|
}
|
|
return comment.replace(/(<\s*\/\s*)(script)/i, "<\\/$2");
|
|
}
|
|
|
|
function prepend_comments(node) {
|
|
var self = this;
|
|
var start = node.start;
|
|
if (!start) return;
|
|
var printed_comments = self.printed_comments;
|
|
|
|
// There cannot be a newline between return and its value.
|
|
const return_with_value = node instanceof AST_Exit && node.value;
|
|
|
|
if (
|
|
start.comments_before
|
|
&& printed_comments.has(start.comments_before)
|
|
) {
|
|
if (return_with_value) {
|
|
start.comments_before = [];
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
|
|
var comments = start.comments_before;
|
|
if (!comments) {
|
|
comments = start.comments_before = [];
|
|
}
|
|
printed_comments.add(comments);
|
|
|
|
if (return_with_value) {
|
|
var tw = new TreeWalker(function(node) {
|
|
var parent = tw.parent();
|
|
if (parent instanceof AST_Exit
|
|
|| parent instanceof AST_Binary && parent.left === node
|
|
|| parent.TYPE == "Call" && parent.expression === node
|
|
|| parent instanceof AST_Conditional && parent.condition === node
|
|
|| parent instanceof AST_Dot && parent.expression === node
|
|
|| parent instanceof AST_Sequence && parent.expressions[0] === node
|
|
|| parent instanceof AST_Sub && parent.expression === node
|
|
|| parent instanceof AST_UnaryPostfix) {
|
|
if (!node.start) return;
|
|
var text = node.start.comments_before;
|
|
if (text && !printed_comments.has(text)) {
|
|
printed_comments.add(text);
|
|
comments = comments.concat(text);
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
});
|
|
tw.push(node);
|
|
node.value.walk(tw);
|
|
}
|
|
|
|
if (current_pos == 0) {
|
|
if (comments.length > 0 && options.shebang && comments[0].type === "comment5"
|
|
&& !printed_comments.has(comments[0])) {
|
|
print("#!" + comments.shift().value + "\n");
|
|
indent();
|
|
}
|
|
var preamble = options.preamble;
|
|
if (preamble) {
|
|
print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
|
|
}
|
|
}
|
|
|
|
comments = comments.filter(comment_filter, node).filter(c => !printed_comments.has(c));
|
|
if (comments.length == 0) return;
|
|
var last_nlb = has_nlb();
|
|
comments.forEach(function(c, i) {
|
|
printed_comments.add(c);
|
|
if (!last_nlb) {
|
|
if (c.nlb) {
|
|
print("\n");
|
|
indent();
|
|
last_nlb = true;
|
|
} else if (i > 0) {
|
|
space();
|
|
}
|
|
}
|
|
|
|
if (/comment[134]/.test(c.type)) {
|
|
var value = filter_comment(c.value);
|
|
if (value) {
|
|
print("//" + value + "\n");
|
|
indent();
|
|
}
|
|
last_nlb = true;
|
|
} else if (c.type == "comment2") {
|
|
var value = filter_comment(c.value);
|
|
if (value) {
|
|
print("/*" + value + "*/");
|
|
}
|
|
last_nlb = false;
|
|
}
|
|
});
|
|
if (!last_nlb) {
|
|
if (start.nlb) {
|
|
print("\n");
|
|
indent();
|
|
} else {
|
|
space();
|
|
}
|
|
}
|
|
}
|
|
|
|
function append_comments(node, tail) {
|
|
var self = this;
|
|
var token = node.end;
|
|
if (!token) return;
|
|
var printed_comments = self.printed_comments;
|
|
var comments = token[tail ? "comments_before" : "comments_after"];
|
|
if (!comments || printed_comments.has(comments)) return;
|
|
if (!(node instanceof AST_Statement || comments.every((c) =>
|
|
!/comment[134]/.test(c.type)
|
|
))) return;
|
|
printed_comments.add(comments);
|
|
var insert = OUTPUT.length();
|
|
comments.filter(comment_filter, node).forEach(function(c, i) {
|
|
if (printed_comments.has(c)) return;
|
|
printed_comments.add(c);
|
|
need_space = false;
|
|
if (need_newline_indented) {
|
|
print("\n");
|
|
indent();
|
|
need_newline_indented = false;
|
|
} else if (c.nlb && (i > 0 || !has_nlb())) {
|
|
print("\n");
|
|
indent();
|
|
} else if (i > 0 || !tail) {
|
|
space();
|
|
}
|
|
if (/comment[134]/.test(c.type)) {
|
|
const value = filter_comment(c.value);
|
|
if (value) {
|
|
print("//" + value);
|
|
}
|
|
need_newline_indented = true;
|
|
} else if (c.type == "comment2") {
|
|
const value = filter_comment(c.value);
|
|
if (value) {
|
|
print("/*" + value + "*/");
|
|
}
|
|
need_space = true;
|
|
}
|
|
});
|
|
if (OUTPUT.length() > insert) newline_insert = insert;
|
|
}
|
|
|
|
/**
|
|
* When output.option("_destroy_ast") is enabled, destroy the function.
|
|
* Call this after printing it.
|
|
*/
|
|
const gc_scope =
|
|
options["_destroy_ast"]
|
|
? function gc_scope(scope) {
|
|
scope.body.length = 0;
|
|
scope.argnames.length = 0;
|
|
}
|
|
: noop;
|
|
|
|
var stack = [];
|
|
return {
|
|
get : get,
|
|
toString : get,
|
|
indent : indent,
|
|
in_directive : false,
|
|
use_asm : null,
|
|
active_scope : null,
|
|
indentation : function() { return indentation; },
|
|
current_width : function() { return current_col - indentation; },
|
|
should_break : function() { return options.width && this.current_width() >= options.width; },
|
|
has_parens : function() { return has_parens; },
|
|
newline : newline,
|
|
print : print,
|
|
star : star,
|
|
space : space,
|
|
comma : comma,
|
|
colon : colon,
|
|
last : function() { return last; },
|
|
semicolon : semicolon,
|
|
force_semicolon : force_semicolon,
|
|
to_utf8 : to_utf8,
|
|
print_name : function(name) { print(make_name(name)); },
|
|
print_string : function(str, quote, escape_directive) {
|
|
var encoded = encode_string(str, quote);
|
|
if (escape_directive === true && !encoded.includes("\\")) {
|
|
// Insert semicolons to break directive prologue
|
|
if (!EXPECT_DIRECTIVE.test(OUTPUT.toString())) {
|
|
force_semicolon();
|
|
}
|
|
force_semicolon();
|
|
}
|
|
print(encoded);
|
|
},
|
|
print_template_string_chars: function(str) {
|
|
var encoded = encode_string(str, "`").replace(/\${/g, "\\${");
|
|
return print(encoded.substr(1, encoded.length - 2));
|
|
},
|
|
encode_string : encode_string,
|
|
next_indent : next_indent,
|
|
with_indent : with_indent,
|
|
with_block : with_block,
|
|
with_parens : with_parens,
|
|
with_square : with_square,
|
|
add_mapping : add_mapping,
|
|
option : function(opt) { return options[opt]; },
|
|
gc_scope,
|
|
printed_comments: printed_comments,
|
|
prepend_comments: readonly ? noop : prepend_comments,
|
|
append_comments : readonly || comment_filter === return_false ? noop : append_comments,
|
|
line : function() { return current_line; },
|
|
col : function() { return current_col; },
|
|
pos : function() { return current_pos; },
|
|
push_node : function(node) { stack.push(node); },
|
|
pop_node : function() { return stack.pop(); },
|
|
parent : function(n) {
|
|
return stack[stack.length - 2 - (n || 0)];
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
/* -----[ code generators ]----- */
|
|
|
|
(function() {
|
|
|
|
/* -----[ utils ]----- */
|
|
|
|
function DEFPRINT(nodetype, generator) {
|
|
nodetype.DEFMETHOD("_codegen", generator);
|
|
}
|
|
|
|
AST_Node.DEFMETHOD("print", function(output, force_parens) {
|
|
var self = this, generator = self._codegen;
|
|
if (self instanceof AST_Scope) {
|
|
output.active_scope = self;
|
|
} else if (!output.use_asm && self instanceof AST_Directive && self.value == "use asm") {
|
|
output.use_asm = output.active_scope;
|
|
}
|
|
function doit() {
|
|
output.prepend_comments(self);
|
|
self.add_source_map(output);
|
|
generator(self, output);
|
|
output.append_comments(self);
|
|
}
|
|
output.push_node(self);
|
|
if (force_parens || self.needs_parens(output)) {
|
|
output.with_parens(doit);
|
|
} else {
|
|
doit();
|
|
}
|
|
output.pop_node();
|
|
if (self === output.use_asm) {
|
|
output.use_asm = null;
|
|
}
|
|
});
|
|
AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
|
|
|
|
AST_Node.DEFMETHOD("print_to_string", function(options) {
|
|
var output = OutputStream(options);
|
|
this.print(output);
|
|
return output.get();
|
|
});
|
|
|
|
/* -----[ PARENTHESES ]----- */
|
|
|
|
function PARENS(nodetype, func) {
|
|
if (Array.isArray(nodetype)) {
|
|
nodetype.forEach(function(nodetype) {
|
|
PARENS(nodetype, func);
|
|
});
|
|
} else {
|
|
nodetype.DEFMETHOD("needs_parens", func);
|
|
}
|
|
}
|
|
|
|
PARENS(AST_Node, return_false);
|
|
|
|
// a function expression needs parens around it when it's provably
|
|
// the first token to appear in a statement.
|
|
PARENS(AST_Function, function(output) {
|
|
if (!output.has_parens() && first_in_statement(output)) {
|
|
return true;
|
|
}
|
|
|
|
if (output.option("webkit")) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (output.option("wrap_iife")) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_Call && p.expression === this) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (output.option("wrap_func_args")) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_Call && p.args.includes(this)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
});
|
|
|
|
PARENS(AST_Arrow, function(output) {
|
|
var p = output.parent();
|
|
|
|
if (
|
|
output.option("wrap_func_args")
|
|
&& p instanceof AST_Call
|
|
&& p.args.includes(this)
|
|
) {
|
|
return true;
|
|
}
|
|
return p instanceof AST_PropAccess && p.expression === this;
|
|
});
|
|
|
|
// same goes for an object literal (as in AST_Function), because
|
|
// otherwise {...} would be interpreted as a block of code.
|
|
PARENS(AST_Object, function(output) {
|
|
return !output.has_parens() && first_in_statement(output);
|
|
});
|
|
|
|
PARENS(AST_ClassExpression, first_in_statement);
|
|
|
|
PARENS(AST_Unary, function(output) {
|
|
var p = output.parent();
|
|
return p instanceof AST_PropAccess && p.expression === this
|
|
|| p instanceof AST_Call && p.expression === this
|
|
|| p instanceof AST_Binary
|
|
&& p.operator === "**"
|
|
&& this instanceof AST_UnaryPrefix
|
|
&& p.left === this
|
|
&& this.operator !== "++"
|
|
&& this.operator !== "--";
|
|
});
|
|
|
|
PARENS(AST_Await, function(output) {
|
|
var p = output.parent();
|
|
return p instanceof AST_PropAccess && p.expression === this
|
|
|| p instanceof AST_Call && p.expression === this
|
|
|| p instanceof AST_Binary && p.operator === "**" && p.left === this
|
|
|| output.option("safari10") && p instanceof AST_UnaryPrefix;
|
|
});
|
|
|
|
PARENS(AST_Sequence, function(output) {
|
|
var p = output.parent();
|
|
return p instanceof AST_Call // (foo, bar)() or foo(1, (2, 3), 4)
|
|
|| p instanceof AST_Unary // !(foo, bar, baz)
|
|
|| p instanceof AST_Binary // 1 + (2, 3) + 4 ==> 8
|
|
|| p instanceof AST_VarDef // var a = (1, 2), b = a + a; ==> b == 4
|
|
|| p instanceof AST_PropAccess // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
|
|
|| p instanceof AST_Array // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
|
|
|| p instanceof AST_ObjectProperty // { foo: (1, 2) }.foo ==> 2
|
|
|| p instanceof AST_Conditional /* (false, true) ? (a = 10, b = 20) : (c = 30)
|
|
* ==> 20 (side effect, set a := 10 and b := 20) */
|
|
|| p instanceof AST_Arrow // x => (x, x)
|
|
|| p instanceof AST_DefaultAssign // x => (x = (0, function(){}))
|
|
|| p instanceof AST_Expansion // [...(a, b)]
|
|
|| p instanceof AST_ForOf && this === p.object // for (e of (foo, bar)) {}
|
|
|| p instanceof AST_Yield // yield (foo, bar)
|
|
|| p instanceof AST_Export // export default (foo, bar)
|
|
;
|
|
});
|
|
|
|
PARENS(AST_Binary, function(output) {
|
|
var p = output.parent();
|
|
// (foo && bar)()
|
|
if (p instanceof AST_Call && p.expression === this)
|
|
return true;
|
|
// typeof (foo && bar)
|
|
if (p instanceof AST_Unary)
|
|
return true;
|
|
// (foo && bar)["prop"], (foo && bar).prop
|
|
if (p instanceof AST_PropAccess && p.expression === this)
|
|
return true;
|
|
// this deals with precedence: 3 * (2 + 1)
|
|
if (p instanceof AST_Binary) {
|
|
const po = p.operator;
|
|
const so = this.operator;
|
|
|
|
if (so === "??" && (po === "||" || po === "&&")) {
|
|
return true;
|
|
}
|
|
|
|
if (po === "??" && (so === "||" || so === "&&")) {
|
|
return true;
|
|
}
|
|
|
|
const pp = PRECEDENCE[po];
|
|
const sp = PRECEDENCE[so];
|
|
if (pp > sp
|
|
|| (pp == sp
|
|
&& (this === p.right || po == "**"))) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS(AST_Yield, function(output) {
|
|
var p = output.parent();
|
|
// (yield 1) + (yield 2)
|
|
// a = yield 3
|
|
if (p instanceof AST_Binary && p.operator !== "=")
|
|
return true;
|
|
// (yield 1)()
|
|
// new (yield 1)()
|
|
if (p instanceof AST_Call && p.expression === this)
|
|
return true;
|
|
// (yield 1) ? yield 2 : yield 3
|
|
if (p instanceof AST_Conditional && p.condition === this)
|
|
return true;
|
|
// -(yield 4)
|
|
if (p instanceof AST_Unary)
|
|
return true;
|
|
// (yield x).foo
|
|
// (yield x)['foo']
|
|
if (p instanceof AST_PropAccess && p.expression === this)
|
|
return true;
|
|
});
|
|
|
|
PARENS(AST_PropAccess, function(output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_New && p.expression === this) {
|
|
// i.e. new (foo.bar().baz)
|
|
//
|
|
// if there's one call into this subtree, then we need
|
|
// parens around it too, otherwise the call will be
|
|
// interpreted as passing the arguments to the upper New
|
|
// expression.
|
|
return walk(this, node => {
|
|
if (node instanceof AST_Scope) return true;
|
|
if (node instanceof AST_Call) {
|
|
return walk_abort; // makes walk() return true.
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
PARENS(AST_Call, function(output) {
|
|
var p = output.parent(), p1;
|
|
if (p instanceof AST_New && p.expression === this
|
|
|| p instanceof AST_Export && p.is_default && this.expression instanceof AST_Function)
|
|
return true;
|
|
|
|
// workaround for Safari bug.
|
|
// https://bugs.webkit.org/show_bug.cgi?id=123506
|
|
return this.expression instanceof AST_Function
|
|
&& p instanceof AST_PropAccess
|
|
&& p.expression === this
|
|
&& (p1 = output.parent(1)) instanceof AST_Assign
|
|
&& p1.left === p;
|
|
});
|
|
|
|
PARENS(AST_New, function(output) {
|
|
var p = output.parent();
|
|
if (this.args.length === 0
|
|
&& (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
|
|
|| p instanceof AST_Call && p.expression === this
|
|
|| p instanceof AST_PrefixedTemplateString && p.prefix === this)) // (new foo)(bar)
|
|
return true;
|
|
});
|
|
|
|
PARENS(AST_Number, function(output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
var value = this.getValue();
|
|
if (value < 0 || /^0/.test(make_num(value))) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS(AST_BigInt, function(output) {
|
|
var p = output.parent();
|
|
if (p instanceof AST_PropAccess && p.expression === this) {
|
|
var value = this.getValue();
|
|
if (value.startsWith("-")) {
|
|
return true;
|
|
}
|
|
}
|
|
});
|
|
|
|
PARENS([ AST_Assign, AST_Conditional ], function(output) {
|
|
var p = output.parent();
|
|
// !(a = false) → true
|
|
if (p instanceof AST_Unary)
|
|
return true;
|
|
// 1 + (a = 2) + 3 → 6, side effect setting a = 2
|
|
if (p instanceof AST_Binary && !(p instanceof AST_Assign))
|
|
return true;
|
|
// (a = func)() —or— new (a = Object)()
|
|
if (p instanceof AST_Call && p.expression === this)
|
|
return true;
|
|
// (a = foo) ? bar : baz
|
|
if (p instanceof AST_Conditional && p.condition === this)
|
|
return true;
|
|
// (a = foo)["prop"] —or— (a = foo).prop
|
|
if (p instanceof AST_PropAccess && p.expression === this)
|
|
return true;
|
|
// ({a, b} = {a: 1, b: 2}), a destructuring assignment
|
|
if (this instanceof AST_Assign && this.left instanceof AST_Destructuring && this.left.is_array === false)
|
|
return true;
|
|
});
|
|
|
|
/* -----[ PRINTERS ]----- */
|
|
|
|
DEFPRINT(AST_Directive, function(self, output) {
|
|
output.print_string(self.value, self.quote);
|
|
output.semicolon();
|
|
});
|
|
|
|
DEFPRINT(AST_Expansion, function (self, output) {
|
|
output.print("...");
|
|
self.expression.print(output);
|
|
});
|
|
|
|
DEFPRINT(AST_Destructuring, function (self, output) {
|
|
output.print(self.is_array ? "[" : "{");
|
|
var len = self.names.length;
|
|
self.names.forEach(function (name, i) {
|
|
if (i > 0) output.comma();
|
|
name.print(output);
|
|
// If the final element is a hole, we need to make sure it
|
|
// doesn't look like a trailing comma, by inserting an actual
|
|
// trailing comma.
|
|
if (i == len - 1 && name instanceof AST_Hole) output.comma();
|
|
});
|
|
output.print(self.is_array ? "]" : "}");
|
|
});
|
|
|
|
DEFPRINT(AST_Debugger, function(self, output) {
|
|
output.print("debugger");
|
|
output.semicolon();
|
|
});
|
|
|
|
/* -----[ statements ]----- */
|
|
|
|
function display_body(body, is_toplevel, output, allow_directives) {
|
|
var last = body.length - 1;
|
|
output.in_directive = allow_directives;
|
|
body.forEach(function(stmt, i) {
|
|
if (output.in_directive === true && !(stmt instanceof AST_Directive ||
|
|
stmt instanceof AST_EmptyStatement ||
|
|
(stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
|
|
)) {
|
|
output.in_directive = false;
|
|
}
|
|
if (!(stmt instanceof AST_EmptyStatement)) {
|
|
output.indent();
|
|
stmt.print(output);
|
|
if (!(i == last && is_toplevel)) {
|
|
output.newline();
|
|
if (is_toplevel) output.newline();
|
|
}
|
|
}
|
|
if (output.in_directive === true &&
|
|
stmt instanceof AST_SimpleStatement &&
|
|
stmt.body instanceof AST_String
|
|
) {
|
|
output.in_directive = false;
|
|
}
|
|
});
|
|
output.in_directive = false;
|
|
}
|
|
|
|
AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
|
|
force_statement(this.body, output);
|
|
});
|
|
|
|
DEFPRINT(AST_Statement, function(self, output) {
|
|
self.body.print(output);
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Toplevel, function(self, output) {
|
|
display_body(self.body, true, output, true);
|
|
output.print("");
|
|
});
|
|
DEFPRINT(AST_LabeledStatement, function(self, output) {
|
|
self.label.print(output);
|
|
output.colon();
|
|
self.body.print(output);
|
|
});
|
|
DEFPRINT(AST_SimpleStatement, function(self, output) {
|
|
self.body.print(output);
|
|
output.semicolon();
|
|
});
|
|
function print_braced_empty(self, output) {
|
|
output.print("{");
|
|
output.with_indent(output.next_indent(), function() {
|
|
output.append_comments(self, true);
|
|
});
|
|
output.print("}");
|
|
}
|
|
function print_braced(self, output, allow_directives) {
|
|
if (self.body.length > 0) {
|
|
output.with_block(function() {
|
|
display_body(self.body, false, output, allow_directives);
|
|
});
|
|
} else print_braced_empty(self, output);
|
|
}
|
|
DEFPRINT(AST_BlockStatement, function(self, output) {
|
|
print_braced(self, output);
|
|
});
|
|
DEFPRINT(AST_EmptyStatement, function(self, output) {
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Do, function(self, output) {
|
|
output.print("do");
|
|
output.space();
|
|
make_block(self.body, output);
|
|
output.space();
|
|
output.print("while");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.condition.print(output);
|
|
});
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_While, function(self, output) {
|
|
output.print("while");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.condition.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_For, function(self, output) {
|
|
output.print("for");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
if (self.init) {
|
|
if (self.init instanceof AST_Definitions) {
|
|
self.init.print(output);
|
|
} else {
|
|
parenthesize_for_noin(self.init, output, true);
|
|
}
|
|
output.print(";");
|
|
output.space();
|
|
} else {
|
|
output.print(";");
|
|
}
|
|
if (self.condition) {
|
|
self.condition.print(output);
|
|
output.print(";");
|
|
output.space();
|
|
} else {
|
|
output.print(";");
|
|
}
|
|
if (self.step) {
|
|
self.step.print(output);
|
|
}
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_ForIn, function(self, output) {
|
|
output.print("for");
|
|
if (self.await) {
|
|
output.space();
|
|
output.print("await");
|
|
}
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.init.print(output);
|
|
output.space();
|
|
output.print(self instanceof AST_ForOf ? "of" : "in");
|
|
output.space();
|
|
self.object.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_With, function(self, output) {
|
|
output.print("with");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.expression.print(output);
|
|
});
|
|
output.space();
|
|
self._do_print_body(output);
|
|
});
|
|
|
|
/* -----[ functions ]----- */
|
|
AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) {
|
|
var self = this;
|
|
if (!nokeyword) {
|
|
if (self.async) {
|
|
output.print("async");
|
|
output.space();
|
|
}
|
|
output.print("function");
|
|
if (self.is_generator) {
|
|
output.star();
|
|
}
|
|
if (self.name) {
|
|
output.space();
|
|
}
|
|
}
|
|
if (self.name instanceof AST_Symbol) {
|
|
self.name.print(output);
|
|
} else if (nokeyword && self.name instanceof AST_Node) {
|
|
output.with_square(function() {
|
|
self.name.print(output); // Computed method name
|
|
});
|
|
}
|
|
output.with_parens(function() {
|
|
self.argnames.forEach(function(arg, i) {
|
|
if (i) output.comma();
|
|
arg.print(output);
|
|
});
|
|
});
|
|
output.space();
|
|
print_braced(self, output, true);
|
|
});
|
|
DEFPRINT(AST_Lambda, function(self, output) {
|
|
self._do_print(output);
|
|
output.gc_scope(self);
|
|
});
|
|
|
|
DEFPRINT(AST_PrefixedTemplateString, function(self, output) {
|
|
var tag = self.prefix;
|
|
var parenthesize_tag = tag instanceof AST_Lambda
|
|
|| tag instanceof AST_Binary
|
|
|| tag instanceof AST_Conditional
|
|
|| tag instanceof AST_Sequence
|
|
|| tag instanceof AST_Unary
|
|
|| tag instanceof AST_Dot && tag.expression instanceof AST_Object;
|
|
if (parenthesize_tag) output.print("(");
|
|
self.prefix.print(output);
|
|
if (parenthesize_tag) output.print(")");
|
|
self.template_string.print(output);
|
|
});
|
|
DEFPRINT(AST_TemplateString, function(self, output) {
|
|
var is_tagged = output.parent() instanceof AST_PrefixedTemplateString;
|
|
|
|
output.print("`");
|
|
for (var i = 0; i < self.segments.length; i++) {
|
|
if (!(self.segments[i] instanceof AST_TemplateSegment)) {
|
|
output.print("${");
|
|
self.segments[i].print(output);
|
|
output.print("}");
|
|
} else if (is_tagged) {
|
|
output.print(self.segments[i].raw);
|
|
} else {
|
|
output.print_template_string_chars(self.segments[i].value);
|
|
}
|
|
}
|
|
output.print("`");
|
|
});
|
|
DEFPRINT(AST_TemplateSegment, function(self, output) {
|
|
output.print_template_string_chars(self.value);
|
|
});
|
|
|
|
AST_Arrow.DEFMETHOD("_do_print", function(output) {
|
|
var self = this;
|
|
var parent = output.parent();
|
|
var needs_parens = (parent instanceof AST_Binary && !(parent instanceof AST_Assign)) ||
|
|
parent instanceof AST_Unary ||
|
|
(parent instanceof AST_Call && self === parent.expression);
|
|
if (needs_parens) { output.print("("); }
|
|
if (self.async) {
|
|
output.print("async");
|
|
output.space();
|
|
}
|
|
if (self.argnames.length === 1 && self.argnames[0] instanceof AST_Symbol) {
|
|
self.argnames[0].print(output);
|
|
} else {
|
|
output.with_parens(function() {
|
|
self.argnames.forEach(function(arg, i) {
|
|
if (i) output.comma();
|
|
arg.print(output);
|
|
});
|
|
});
|
|
}
|
|
output.space();
|
|
output.print("=>");
|
|
output.space();
|
|
const first_statement = self.body[0];
|
|
if (
|
|
self.body.length === 1
|
|
&& first_statement instanceof AST_Return
|
|
) {
|
|
const returned = first_statement.value;
|
|
if (!returned) {
|
|
output.print("{}");
|
|
} else if (left_is_object(returned)) {
|
|
output.print("(");
|
|
returned.print(output);
|
|
output.print(")");
|
|
} else {
|
|
returned.print(output);
|
|
}
|
|
} else {
|
|
print_braced(self, output);
|
|
}
|
|
if (needs_parens) { output.print(")"); }
|
|
output.gc_scope(self);
|
|
});
|
|
|
|
/* -----[ exits ]----- */
|
|
AST_Exit.DEFMETHOD("_do_print", function(output, kind) {
|
|
output.print(kind);
|
|
if (this.value) {
|
|
output.space();
|
|
const comments = this.value.start.comments_before;
|
|
if (comments && comments.length && !output.printed_comments.has(comments)) {
|
|
output.print("(");
|
|
this.value.print(output);
|
|
output.print(")");
|
|
} else {
|
|
this.value.print(output);
|
|
}
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Return, function(self, output) {
|
|
self._do_print(output, "return");
|
|
});
|
|
DEFPRINT(AST_Throw, function(self, output) {
|
|
self._do_print(output, "throw");
|
|
});
|
|
|
|
/* -----[ yield ]----- */
|
|
|
|
DEFPRINT(AST_Yield, function(self, output) {
|
|
var star = self.is_star ? "*" : "";
|
|
output.print("yield" + star);
|
|
if (self.expression) {
|
|
output.space();
|
|
self.expression.print(output);
|
|
}
|
|
});
|
|
|
|
DEFPRINT(AST_Await, function(self, output) {
|
|
output.print("await");
|
|
output.space();
|
|
var e = self.expression;
|
|
var parens = !(
|
|
e instanceof AST_Call
|
|
|| e instanceof AST_SymbolRef
|
|
|| e instanceof AST_PropAccess
|
|
|| e instanceof AST_Unary
|
|
|| e instanceof AST_Constant
|
|
|| e instanceof AST_Await
|
|
|| e instanceof AST_Object
|
|
);
|
|
if (parens) output.print("(");
|
|
self.expression.print(output);
|
|
if (parens) output.print(")");
|
|
});
|
|
|
|
/* -----[ loop control ]----- */
|
|
AST_LoopControl.DEFMETHOD("_do_print", function(output, kind) {
|
|
output.print(kind);
|
|
if (this.label) {
|
|
output.space();
|
|
this.label.print(output);
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Break, function(self, output) {
|
|
self._do_print(output, "break");
|
|
});
|
|
DEFPRINT(AST_Continue, function(self, output) {
|
|
self._do_print(output, "continue");
|
|
});
|
|
|
|
/* -----[ if ]----- */
|
|
function make_then(self, output) {
|
|
var b = self.body;
|
|
if (output.option("braces")
|
|
|| output.option("ie8") && b instanceof AST_Do)
|
|
return make_block(b, output);
|
|
// The squeezer replaces "block"-s that contain only a single
|
|
// statement with the statement itself; technically, the AST
|
|
// is correct, but this can create problems when we output an
|
|
// IF having an ELSE clause where the THEN clause ends in an
|
|
// IF *without* an ELSE block (then the outer ELSE would refer
|
|
// to the inner IF). This function checks for this case and
|
|
// adds the block braces if needed.
|
|
if (!b) return output.force_semicolon();
|
|
while (true) {
|
|
if (b instanceof AST_If) {
|
|
if (!b.alternative) {
|
|
make_block(self.body, output);
|
|
return;
|
|
}
|
|
b = b.alternative;
|
|
} else if (b instanceof AST_StatementWithBody) {
|
|
b = b.body;
|
|
} else break;
|
|
}
|
|
force_statement(self.body, output);
|
|
}
|
|
DEFPRINT(AST_If, function(self, output) {
|
|
output.print("if");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.condition.print(output);
|
|
});
|
|
output.space();
|
|
if (self.alternative) {
|
|
make_then(self, output);
|
|
output.space();
|
|
output.print("else");
|
|
output.space();
|
|
if (self.alternative instanceof AST_If)
|
|
self.alternative.print(output);
|
|
else
|
|
force_statement(self.alternative, output);
|
|
} else {
|
|
self._do_print_body(output);
|
|
}
|
|
});
|
|
|
|
/* -----[ switch ]----- */
|
|
DEFPRINT(AST_Switch, function(self, output) {
|
|
output.print("switch");
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.expression.print(output);
|
|
});
|
|
output.space();
|
|
var last = self.body.length - 1;
|
|
if (last < 0) print_braced_empty(self, output);
|
|
else output.with_block(function() {
|
|
self.body.forEach(function(branch, i) {
|
|
output.indent(true);
|
|
branch.print(output);
|
|
if (i < last && branch.body.length > 0)
|
|
output.newline();
|
|
});
|
|
});
|
|
});
|
|
AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) {
|
|
output.newline();
|
|
this.body.forEach(function(stmt) {
|
|
output.indent();
|
|
stmt.print(output);
|
|
output.newline();
|
|
});
|
|
});
|
|
DEFPRINT(AST_Default, function(self, output) {
|
|
output.print("default:");
|
|
self._do_print_body(output);
|
|
});
|
|
DEFPRINT(AST_Case, function(self, output) {
|
|
output.print("case");
|
|
output.space();
|
|
self.expression.print(output);
|
|
output.print(":");
|
|
self._do_print_body(output);
|
|
});
|
|
|
|
/* -----[ exceptions ]----- */
|
|
DEFPRINT(AST_Try, function(self, output) {
|
|
output.print("try");
|
|
output.space();
|
|
print_braced(self, output);
|
|
if (self.bcatch) {
|
|
output.space();
|
|
self.bcatch.print(output);
|
|
}
|
|
if (self.bfinally) {
|
|
output.space();
|
|
self.bfinally.print(output);
|
|
}
|
|
});
|
|
DEFPRINT(AST_Catch, function(self, output) {
|
|
output.print("catch");
|
|
if (self.argname) {
|
|
output.space();
|
|
output.with_parens(function() {
|
|
self.argname.print(output);
|
|
});
|
|
}
|
|
output.space();
|
|
print_braced(self, output);
|
|
});
|
|
DEFPRINT(AST_Finally, function(self, output) {
|
|
output.print("finally");
|
|
output.space();
|
|
print_braced(self, output);
|
|
});
|
|
|
|
/* -----[ var/const ]----- */
|
|
AST_Definitions.DEFMETHOD("_do_print", function(output, kind) {
|
|
output.print(kind);
|
|
output.space();
|
|
this.definitions.forEach(function(def, i) {
|
|
if (i) output.comma();
|
|
def.print(output);
|
|
});
|
|
var p = output.parent();
|
|
var in_for = p instanceof AST_For || p instanceof AST_ForIn;
|
|
var output_semicolon = !in_for || p && p.init !== this;
|
|
if (output_semicolon)
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_Let, function(self, output) {
|
|
self._do_print(output, "let");
|
|
});
|
|
DEFPRINT(AST_Var, function(self, output) {
|
|
self._do_print(output, "var");
|
|
});
|
|
DEFPRINT(AST_Const, function(self, output) {
|
|
self._do_print(output, "const");
|
|
});
|
|
DEFPRINT(AST_Import, function(self, output) {
|
|
output.print("import");
|
|
output.space();
|
|
if (self.imported_name) {
|
|
self.imported_name.print(output);
|
|
}
|
|
if (self.imported_name && self.imported_names) {
|
|
output.print(",");
|
|
output.space();
|
|
}
|
|
if (self.imported_names) {
|
|
if (self.imported_names.length === 1 && self.imported_names[0].foreign_name.name === "*") {
|
|
self.imported_names[0].print(output);
|
|
} else {
|
|
output.print("{");
|
|
self.imported_names.forEach(function (name_import, i) {
|
|
output.space();
|
|
name_import.print(output);
|
|
if (i < self.imported_names.length - 1) {
|
|
output.print(",");
|
|
}
|
|
});
|
|
output.space();
|
|
output.print("}");
|
|
}
|
|
}
|
|
if (self.imported_name || self.imported_names) {
|
|
output.space();
|
|
output.print("from");
|
|
output.space();
|
|
}
|
|
self.module_name.print(output);
|
|
if (self.assert_clause) {
|
|
output.print("assert");
|
|
self.assert_clause.print(output);
|
|
}
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_ImportMeta, function(self, output) {
|
|
output.print("import.meta");
|
|
});
|
|
|
|
DEFPRINT(AST_NameMapping, function(self, output) {
|
|
var is_import = output.parent() instanceof AST_Import;
|
|
var definition = self.name.definition();
|
|
var names_are_different =
|
|
(definition && definition.mangled_name || self.name.name) !==
|
|
self.foreign_name.name;
|
|
if (names_are_different) {
|
|
if (is_import) {
|
|
output.print(self.foreign_name.name);
|
|
} else {
|
|
self.name.print(output);
|
|
}
|
|
output.space();
|
|
output.print("as");
|
|
output.space();
|
|
if (is_import) {
|
|
self.name.print(output);
|
|
} else {
|
|
output.print(self.foreign_name.name);
|
|
}
|
|
} else {
|
|
self.name.print(output);
|
|
}
|
|
});
|
|
|
|
DEFPRINT(AST_Export, function(self, output) {
|
|
output.print("export");
|
|
output.space();
|
|
if (self.is_default) {
|
|
output.print("default");
|
|
output.space();
|
|
}
|
|
if (self.exported_names) {
|
|
if (self.exported_names.length === 1 && self.exported_names[0].name.name === "*") {
|
|
self.exported_names[0].print(output);
|
|
} else {
|
|
output.print("{");
|
|
self.exported_names.forEach(function(name_export, i) {
|
|
output.space();
|
|
name_export.print(output);
|
|
if (i < self.exported_names.length - 1) {
|
|
output.print(",");
|
|
}
|
|
});
|
|
output.space();
|
|
output.print("}");
|
|
}
|
|
} else if (self.exported_value) {
|
|
self.exported_value.print(output);
|
|
} else if (self.exported_definition) {
|
|
self.exported_definition.print(output);
|
|
if (self.exported_definition instanceof AST_Definitions) return;
|
|
}
|
|
if (self.module_name) {
|
|
output.space();
|
|
output.print("from");
|
|
output.space();
|
|
self.module_name.print(output);
|
|
}
|
|
if (self.assert_clause) {
|
|
output.print("assert");
|
|
self.assert_clause.print(output);
|
|
}
|
|
if (self.exported_value
|
|
&& !(self.exported_value instanceof AST_Defun ||
|
|
self.exported_value instanceof AST_Function ||
|
|
self.exported_value instanceof AST_Class)
|
|
|| self.module_name
|
|
|| self.exported_names
|
|
) {
|
|
output.semicolon();
|
|
}
|
|
});
|
|
|
|
function parenthesize_for_noin(node, output, noin) {
|
|
var parens = false;
|
|
// need to take some precautions here:
|
|
// https://github.com/mishoo/UglifyJS2/issues/60
|
|
if (noin) {
|
|
parens = walk(node, node => {
|
|
// Don't go into scopes -- except arrow functions:
|
|
// https://github.com/terser/terser/issues/1019#issuecomment-877642607
|
|
if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
|
|
return true;
|
|
}
|
|
if (node instanceof AST_Binary && node.operator == "in") {
|
|
return walk_abort; // makes walk() return true
|
|
}
|
|
});
|
|
}
|
|
node.print(output, parens);
|
|
}
|
|
|
|
DEFPRINT(AST_VarDef, function(self, output) {
|
|
self.name.print(output);
|
|
if (self.value) {
|
|
output.space();
|
|
output.print("=");
|
|
output.space();
|
|
var p = output.parent(1);
|
|
var noin = p instanceof AST_For || p instanceof AST_ForIn;
|
|
parenthesize_for_noin(self.value, output, noin);
|
|
}
|
|
});
|
|
|
|
/* -----[ other expressions ]----- */
|
|
DEFPRINT(AST_Call, function(self, output) {
|
|
self.expression.print(output);
|
|
if (self instanceof AST_New && self.args.length === 0)
|
|
return;
|
|
if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
|
|
output.add_mapping(self.start);
|
|
}
|
|
if (self.optional) output.print("?.");
|
|
output.with_parens(function() {
|
|
self.args.forEach(function(expr, i) {
|
|
if (i) output.comma();
|
|
expr.print(output);
|
|
});
|
|
});
|
|
});
|
|
DEFPRINT(AST_New, function(self, output) {
|
|
output.print("new");
|
|
output.space();
|
|
AST_Call.prototype._codegen(self, output);
|
|
});
|
|
|
|
AST_Sequence.DEFMETHOD("_do_print", function(output) {
|
|
this.expressions.forEach(function(node, index) {
|
|
if (index > 0) {
|
|
output.comma();
|
|
if (output.should_break()) {
|
|
output.newline();
|
|
output.indent();
|
|
}
|
|
}
|
|
node.print(output);
|
|
});
|
|
});
|
|
DEFPRINT(AST_Sequence, function(self, output) {
|
|
self._do_print(output);
|
|
// var p = output.parent();
|
|
// if (p instanceof AST_Statement) {
|
|
// output.with_indent(output.next_indent(), function(){
|
|
// self._do_print(output);
|
|
// });
|
|
// } else {
|
|
// self._do_print(output);
|
|
// }
|
|
});
|
|
DEFPRINT(AST_Dot, function(self, output) {
|
|
var expr = self.expression;
|
|
expr.print(output);
|
|
var prop = self.property;
|
|
var print_computed = ALL_RESERVED_WORDS.has(prop)
|
|
? output.option("ie8")
|
|
: !is_identifier_string(
|
|
prop,
|
|
output.option("ecma") >= 2015 || output.option("safari10")
|
|
);
|
|
|
|
if (self.optional) output.print("?.");
|
|
|
|
if (print_computed) {
|
|
output.print("[");
|
|
output.add_mapping(self.end);
|
|
output.print_string(prop);
|
|
output.print("]");
|
|
} else {
|
|
if (expr instanceof AST_Number && expr.getValue() >= 0) {
|
|
if (!/[xa-f.)]/i.test(output.last())) {
|
|
output.print(".");
|
|
}
|
|
}
|
|
if (!self.optional) output.print(".");
|
|
// the name after dot would be mapped about here.
|
|
output.add_mapping(self.end);
|
|
output.print_name(prop);
|
|
}
|
|
});
|
|
DEFPRINT(AST_DotHash, function(self, output) {
|
|
var expr = self.expression;
|
|
expr.print(output);
|
|
var prop = self.property;
|
|
|
|
if (self.optional) output.print("?");
|
|
output.print(".#");
|
|
output.add_mapping(self.end);
|
|
output.print_name(prop);
|
|
});
|
|
DEFPRINT(AST_Sub, function(self, output) {
|
|
self.expression.print(output);
|
|
if (self.optional) output.print("?.");
|
|
output.print("[");
|
|
self.property.print(output);
|
|
output.print("]");
|
|
});
|
|
DEFPRINT(AST_Chain, function(self, output) {
|
|
self.expression.print(output);
|
|
});
|
|
DEFPRINT(AST_UnaryPrefix, function(self, output) {
|
|
var op = self.operator;
|
|
output.print(op);
|
|
if (/^[a-z]/i.test(op)
|
|
|| (/[+-]$/.test(op)
|
|
&& self.expression instanceof AST_UnaryPrefix
|
|
&& /^[+-]/.test(self.expression.operator))) {
|
|
output.space();
|
|
}
|
|
self.expression.print(output);
|
|
});
|
|
DEFPRINT(AST_UnaryPostfix, function(self, output) {
|
|
self.expression.print(output);
|
|
output.print(self.operator);
|
|
});
|
|
DEFPRINT(AST_Binary, function(self, output) {
|
|
var op = self.operator;
|
|
self.left.print(output);
|
|
if (op[0] == ">" /* ">>" ">>>" ">" ">=" */
|
|
&& self.left instanceof AST_UnaryPostfix
|
|
&& self.left.operator == "--") {
|
|
// space is mandatory to avoid outputting -->
|
|
output.print(" ");
|
|
} else {
|
|
// the space is optional depending on "beautify"
|
|
output.space();
|
|
}
|
|
output.print(op);
|
|
if ((op == "<" || op == "<<")
|
|
&& self.right instanceof AST_UnaryPrefix
|
|
&& self.right.operator == "!"
|
|
&& self.right.expression instanceof AST_UnaryPrefix
|
|
&& self.right.expression.operator == "--") {
|
|
// space is mandatory to avoid outputting <!--
|
|
output.print(" ");
|
|
} else {
|
|
// the space is optional depending on "beautify"
|
|
output.space();
|
|
}
|
|
self.right.print(output);
|
|
});
|
|
DEFPRINT(AST_Conditional, function(self, output) {
|
|
self.condition.print(output);
|
|
output.space();
|
|
output.print("?");
|
|
output.space();
|
|
self.consequent.print(output);
|
|
output.space();
|
|
output.colon();
|
|
self.alternative.print(output);
|
|
});
|
|
|
|
/* -----[ literals ]----- */
|
|
DEFPRINT(AST_Array, function(self, output) {
|
|
output.with_square(function() {
|
|
var a = self.elements, len = a.length;
|
|
if (len > 0) output.space();
|
|
a.forEach(function(exp, i) {
|
|
if (i) output.comma();
|
|
exp.print(output);
|
|
// If the final element is a hole, we need to make sure it
|
|
// doesn't look like a trailing comma, by inserting an actual
|
|
// trailing comma.
|
|
if (i === len - 1 && exp instanceof AST_Hole)
|
|
output.comma();
|
|
});
|
|
if (len > 0) output.space();
|
|
});
|
|
});
|
|
DEFPRINT(AST_Object, function(self, output) {
|
|
if (self.properties.length > 0) output.with_block(function() {
|
|
self.properties.forEach(function(prop, i) {
|
|
if (i) {
|
|
output.print(",");
|
|
output.newline();
|
|
}
|
|
output.indent();
|
|
prop.print(output);
|
|
});
|
|
output.newline();
|
|
});
|
|
else print_braced_empty(self, output);
|
|
});
|
|
DEFPRINT(AST_Class, function(self, output) {
|
|
output.print("class");
|
|
output.space();
|
|
if (self.name) {
|
|
self.name.print(output);
|
|
output.space();
|
|
}
|
|
if (self.extends) {
|
|
var parens = (
|
|
!(self.extends instanceof AST_SymbolRef)
|
|
&& !(self.extends instanceof AST_PropAccess)
|
|
&& !(self.extends instanceof AST_ClassExpression)
|
|
&& !(self.extends instanceof AST_Function)
|
|
);
|
|
output.print("extends");
|
|
if (parens) {
|
|
output.print("(");
|
|
} else {
|
|
output.space();
|
|
}
|
|
self.extends.print(output);
|
|
if (parens) {
|
|
output.print(")");
|
|
} else {
|
|
output.space();
|
|
}
|
|
}
|
|
if (self.properties.length > 0) output.with_block(function() {
|
|
self.properties.forEach(function(prop, i) {
|
|
if (i) {
|
|
output.newline();
|
|
}
|
|
output.indent();
|
|
prop.print(output);
|
|
});
|
|
output.newline();
|
|
});
|
|
else output.print("{}");
|
|
});
|
|
DEFPRINT(AST_NewTarget, function(self, output) {
|
|
output.print("new.target");
|
|
});
|
|
|
|
function print_property_name(key, quote, output) {
|
|
if (output.option("quote_keys")) {
|
|
return output.print_string(key);
|
|
}
|
|
if ("" + +key == key && key >= 0) {
|
|
if (output.option("keep_numbers")) {
|
|
return output.print(key);
|
|
}
|
|
return output.print(make_num(key));
|
|
}
|
|
var print_string = ALL_RESERVED_WORDS.has(key)
|
|
? output.option("ie8")
|
|
: (
|
|
output.option("ecma") < 2015 || output.option("safari10")
|
|
? !is_basic_identifier_string(key)
|
|
: !is_identifier_string(key, true)
|
|
);
|
|
if (print_string || (quote && output.option("keep_quoted_props"))) {
|
|
return output.print_string(key, quote);
|
|
}
|
|
return output.print_name(key);
|
|
}
|
|
|
|
DEFPRINT(AST_ObjectKeyVal, function(self, output) {
|
|
function get_name(self) {
|
|
var def = self.definition();
|
|
return def ? def.mangled_name || def.name : self.name;
|
|
}
|
|
|
|
var allowShortHand = output.option("shorthand");
|
|
if (allowShortHand &&
|
|
self.value instanceof AST_Symbol &&
|
|
is_identifier_string(
|
|
self.key,
|
|
output.option("ecma") >= 2015 || output.option("safari10")
|
|
) &&
|
|
get_name(self.value) === self.key &&
|
|
!ALL_RESERVED_WORDS.has(self.key)
|
|
) {
|
|
print_property_name(self.key, self.quote, output);
|
|
|
|
} else if (allowShortHand &&
|
|
self.value instanceof AST_DefaultAssign &&
|
|
self.value.left instanceof AST_Symbol &&
|
|
is_identifier_string(
|
|
self.key,
|
|
output.option("ecma") >= 2015 || output.option("safari10")
|
|
) &&
|
|
get_name(self.value.left) === self.key
|
|
) {
|
|
print_property_name(self.key, self.quote, output);
|
|
output.space();
|
|
output.print("=");
|
|
output.space();
|
|
self.value.right.print(output);
|
|
} else {
|
|
if (!(self.key instanceof AST_Node)) {
|
|
print_property_name(self.key, self.quote, output);
|
|
} else {
|
|
output.with_square(function() {
|
|
self.key.print(output);
|
|
});
|
|
}
|
|
output.colon();
|
|
self.value.print(output);
|
|
}
|
|
});
|
|
DEFPRINT(AST_ClassPrivateProperty, (self, output) => {
|
|
if (self.static) {
|
|
output.print("static");
|
|
output.space();
|
|
}
|
|
|
|
output.print("#");
|
|
|
|
print_property_name(self.key.name, self.quote, output);
|
|
|
|
if (self.value) {
|
|
output.print("=");
|
|
self.value.print(output);
|
|
}
|
|
|
|
output.semicolon();
|
|
});
|
|
DEFPRINT(AST_ClassProperty, (self, output) => {
|
|
if (self.static) {
|
|
output.print("static");
|
|
output.space();
|
|
}
|
|
|
|
if (self.key instanceof AST_SymbolClassProperty) {
|
|
print_property_name(self.key.name, self.quote, output);
|
|
} else {
|
|
output.print("[");
|
|
self.key.print(output);
|
|
output.print("]");
|
|
}
|
|
|
|
if (self.value) {
|
|
output.print("=");
|
|
self.value.print(output);
|
|
}
|
|
|
|
output.semicolon();
|
|
});
|
|
AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, is_private, output) {
|
|
var self = this;
|
|
if (self.static) {
|
|
output.print("static");
|
|
output.space();
|
|
}
|
|
if (type) {
|
|
output.print(type);
|
|
output.space();
|
|
}
|
|
if (self.key instanceof AST_SymbolMethod) {
|
|
if (is_private) output.print("#");
|
|
print_property_name(self.key.name, self.quote, output);
|
|
} else {
|
|
output.with_square(function() {
|
|
self.key.print(output);
|
|
});
|
|
}
|
|
self.value._do_print(output, true);
|
|
});
|
|
DEFPRINT(AST_ObjectSetter, function(self, output) {
|
|
self._print_getter_setter("set", false, output);
|
|
});
|
|
DEFPRINT(AST_ObjectGetter, function(self, output) {
|
|
self._print_getter_setter("get", false, output);
|
|
});
|
|
DEFPRINT(AST_PrivateSetter, function(self, output) {
|
|
self._print_getter_setter("set", true, output);
|
|
});
|
|
DEFPRINT(AST_PrivateGetter, function(self, output) {
|
|
self._print_getter_setter("get", true, output);
|
|
});
|
|
DEFPRINT(AST_PrivateMethod, function(self, output) {
|
|
var type;
|
|
if (self.is_generator && self.async) {
|
|
type = "async*";
|
|
} else if (self.is_generator) {
|
|
type = "*";
|
|
} else if (self.async) {
|
|
type = "async";
|
|
}
|
|
self._print_getter_setter(type, true, output);
|
|
});
|
|
DEFPRINT(AST_ConciseMethod, function(self, output) {
|
|
var type;
|
|
if (self.is_generator && self.async) {
|
|
type = "async*";
|
|
} else if (self.is_generator) {
|
|
type = "*";
|
|
} else if (self.async) {
|
|
type = "async";
|
|
}
|
|
self._print_getter_setter(type, false, output);
|
|
});
|
|
AST_Symbol.DEFMETHOD("_do_print", function(output) {
|
|
var def = this.definition();
|
|
output.print_name(def ? def.mangled_name || def.name : this.name);
|
|
});
|
|
DEFPRINT(AST_Symbol, function (self, output) {
|
|
self._do_print(output);
|
|
});
|
|
DEFPRINT(AST_Hole, noop);
|
|
DEFPRINT(AST_This, function(self, output) {
|
|
output.print("this");
|
|
});
|
|
DEFPRINT(AST_Super, function(self, output) {
|
|
output.print("super");
|
|
});
|
|
DEFPRINT(AST_Constant, function(self, output) {
|
|
output.print(self.getValue());
|
|
});
|
|
DEFPRINT(AST_String, function(self, output) {
|
|
output.print_string(self.getValue(), self.quote, output.in_directive);
|
|
});
|
|
DEFPRINT(AST_Number, function(self, output) {
|
|
if ((output.option("keep_numbers") || output.use_asm) && self.raw) {
|
|
output.print(self.raw);
|
|
} else {
|
|
output.print(make_num(self.getValue()));
|
|
}
|
|
});
|
|
DEFPRINT(AST_BigInt, function(self, output) {
|
|
output.print(self.getValue() + "n");
|
|
});
|
|
|
|
const r_slash_script = /(<\s*\/\s*script)/i;
|
|
const slash_script_replace = (_, $1) => $1.replace("/", "\\/");
|
|
DEFPRINT(AST_RegExp, function(self, output) {
|
|
let { source, flags } = self.getValue();
|
|
source = regexp_source_fix(source);
|
|
flags = flags ? sort_regexp_flags(flags) : "";
|
|
source = source.replace(r_slash_script, slash_script_replace);
|
|
|
|
output.print(output.to_utf8(`/${source}/${flags}`, false, true));
|
|
|
|
const parent = output.parent();
|
|
if (
|
|
parent instanceof AST_Binary
|
|
&& /^\w/.test(parent.operator)
|
|
&& parent.left === self
|
|
) {
|
|
output.print(" ");
|
|
}
|
|
});
|
|
|
|
function force_statement(stat, output) {
|
|
if (output.option("braces")) {
|
|
make_block(stat, output);
|
|
} else {
|
|
if (!stat || stat instanceof AST_EmptyStatement)
|
|
output.force_semicolon();
|
|
else
|
|
stat.print(output);
|
|
}
|
|
}
|
|
|
|
function best_of(a) {
|
|
var best = a[0], len = best.length;
|
|
for (var i = 1; i < a.length; ++i) {
|
|
if (a[i].length < len) {
|
|
best = a[i];
|
|
len = best.length;
|
|
}
|
|
}
|
|
return best;
|
|
}
|
|
|
|
function make_num(num) {
|
|
var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e");
|
|
var candidates = [ str ];
|
|
if (Math.floor(num) === num) {
|
|
if (num < 0) {
|
|
candidates.push("-0x" + (-num).toString(16).toLowerCase());
|
|
} else {
|
|
candidates.push("0x" + num.toString(16).toLowerCase());
|
|
}
|
|
}
|
|
var match, len, digits;
|
|
if (match = /^\.0+/.exec(str)) {
|
|
len = match[0].length;
|
|
digits = str.slice(len);
|
|
candidates.push(digits + "e-" + (digits.length + len - 1));
|
|
} else if (match = /0+$/.exec(str)) {
|
|
len = match[0].length;
|
|
candidates.push(str.slice(0, -len) + "e" + len);
|
|
} else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) {
|
|
candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length));
|
|
}
|
|
return best_of(candidates);
|
|
}
|
|
|
|
function make_block(stmt, output) {
|
|
if (!stmt || stmt instanceof AST_EmptyStatement)
|
|
output.print("{}");
|
|
else if (stmt instanceof AST_BlockStatement)
|
|
stmt.print(output);
|
|
else output.with_block(function() {
|
|
output.indent();
|
|
stmt.print(output);
|
|
output.newline();
|
|
});
|
|
}
|
|
|
|
/* -----[ source map generators ]----- */
|
|
|
|
function DEFMAP(nodetype, generator) {
|
|
nodetype.forEach(function(nodetype) {
|
|
nodetype.DEFMETHOD("add_source_map", generator);
|
|
});
|
|
}
|
|
|
|
DEFMAP([
|
|
// We could easily add info for ALL nodes, but it seems to me that
|
|
// would be quite wasteful, hence this noop in the base class.
|
|
AST_Node,
|
|
// since the label symbol will mark it
|
|
AST_LabeledStatement,
|
|
AST_Toplevel,
|
|
], noop);
|
|
|
|
// XXX: I'm not exactly sure if we need it for all of these nodes,
|
|
// or if we should add even more.
|
|
DEFMAP([
|
|
AST_Array,
|
|
AST_BlockStatement,
|
|
AST_Catch,
|
|
AST_Class,
|
|
AST_Constant,
|
|
AST_Debugger,
|
|
AST_Definitions,
|
|
AST_Directive,
|
|
AST_Finally,
|
|
AST_Jump,
|
|
AST_Lambda,
|
|
AST_New,
|
|
AST_Object,
|
|
AST_StatementWithBody,
|
|
AST_Symbol,
|
|
AST_Switch,
|
|
AST_SwitchBranch,
|
|
AST_TemplateString,
|
|
AST_TemplateSegment,
|
|
AST_Try,
|
|
], function(output) {
|
|
output.add_mapping(this.start);
|
|
});
|
|
|
|
DEFMAP([
|
|
AST_ObjectGetter,
|
|
AST_ObjectSetter,
|
|
AST_PrivateGetter,
|
|
AST_PrivateSetter,
|
|
], function(output) {
|
|
output.add_mapping(this.key.end, this.key.name);
|
|
});
|
|
|
|
DEFMAP([ AST_ObjectProperty ], function(output) {
|
|
output.add_mapping(this.start, this.key);
|
|
});
|
|
})();
|
|
|
|
export {
|
|
OutputStream,
|
|
};
|