[6a3a178] | 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import * as o from './output_ast';
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| 9 | import { SourceMapGenerator } from './source_map';
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| 10 | const _SINGLE_QUOTE_ESCAPE_STRING_RE = /'|\\|\n|\r|\$/g;
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| 11 | const _LEGAL_IDENTIFIER_RE = /^[$A-Z_][0-9A-Z_$]*$/i;
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| 12 | const _INDENT_WITH = ' ';
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| 13 | export const CATCH_ERROR_VAR = o.variable('error', null, null);
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| 14 | export const CATCH_STACK_VAR = o.variable('stack', null, null);
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| 15 | class _EmittedLine {
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| 16 | constructor(indent) {
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| 17 | this.indent = indent;
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| 18 | this.partsLength = 0;
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| 19 | this.parts = [];
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| 20 | this.srcSpans = [];
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| 21 | }
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| 22 | }
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| 23 | export class EmitterVisitorContext {
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| 24 | constructor(_indent) {
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| 25 | this._indent = _indent;
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| 26 | this._classes = [];
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| 27 | this._preambleLineCount = 0;
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| 28 | this._lines = [new _EmittedLine(_indent)];
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| 29 | }
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| 30 | static createRoot() {
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| 31 | return new EmitterVisitorContext(0);
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| 32 | }
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| 33 | /**
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| 34 | * @internal strip this from published d.ts files due to
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| 35 | * https://github.com/microsoft/TypeScript/issues/36216
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| 36 | */
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| 37 | get _currentLine() {
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| 38 | return this._lines[this._lines.length - 1];
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| 39 | }
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| 40 | println(from, lastPart = '') {
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| 41 | this.print(from || null, lastPart, true);
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| 42 | }
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| 43 | lineIsEmpty() {
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| 44 | return this._currentLine.parts.length === 0;
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| 45 | }
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| 46 | lineLength() {
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| 47 | return this._currentLine.indent * _INDENT_WITH.length + this._currentLine.partsLength;
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| 48 | }
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| 49 | print(from, part, newLine = false) {
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| 50 | if (part.length > 0) {
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| 51 | this._currentLine.parts.push(part);
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| 52 | this._currentLine.partsLength += part.length;
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| 53 | this._currentLine.srcSpans.push(from && from.sourceSpan || null);
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| 54 | }
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| 55 | if (newLine) {
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| 56 | this._lines.push(new _EmittedLine(this._indent));
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| 57 | }
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| 58 | }
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| 59 | removeEmptyLastLine() {
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| 60 | if (this.lineIsEmpty()) {
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| 61 | this._lines.pop();
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| 62 | }
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| 63 | }
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| 64 | incIndent() {
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| 65 | this._indent++;
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| 66 | if (this.lineIsEmpty()) {
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| 67 | this._currentLine.indent = this._indent;
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| 68 | }
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| 69 | }
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| 70 | decIndent() {
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| 71 | this._indent--;
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| 72 | if (this.lineIsEmpty()) {
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| 73 | this._currentLine.indent = this._indent;
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| 74 | }
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| 75 | }
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| 76 | pushClass(clazz) {
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| 77 | this._classes.push(clazz);
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| 78 | }
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| 79 | popClass() {
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| 80 | return this._classes.pop();
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| 81 | }
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| 82 | get currentClass() {
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| 83 | return this._classes.length > 0 ? this._classes[this._classes.length - 1] : null;
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| 84 | }
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| 85 | toSource() {
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| 86 | return this.sourceLines
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| 87 | .map(l => l.parts.length > 0 ? _createIndent(l.indent) + l.parts.join('') : '')
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| 88 | .join('\n');
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| 89 | }
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| 90 | toSourceMapGenerator(genFilePath, startsAtLine = 0) {
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| 91 | const map = new SourceMapGenerator(genFilePath);
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| 92 | let firstOffsetMapped = false;
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| 93 | const mapFirstOffsetIfNeeded = () => {
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| 94 | if (!firstOffsetMapped) {
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| 95 | // Add a single space so that tools won't try to load the file from disk.
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| 96 | // Note: We are using virtual urls like `ng:///`, so we have to
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| 97 | // provide a content here.
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| 98 | map.addSource(genFilePath, ' ').addMapping(0, genFilePath, 0, 0);
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| 99 | firstOffsetMapped = true;
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| 100 | }
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| 101 | };
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| 102 | for (let i = 0; i < startsAtLine; i++) {
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| 103 | map.addLine();
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| 104 | mapFirstOffsetIfNeeded();
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| 105 | }
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| 106 | this.sourceLines.forEach((line, lineIdx) => {
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| 107 | map.addLine();
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| 108 | const spans = line.srcSpans;
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| 109 | const parts = line.parts;
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| 110 | let col0 = line.indent * _INDENT_WITH.length;
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| 111 | let spanIdx = 0;
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| 112 | // skip leading parts without source spans
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| 113 | while (spanIdx < spans.length && !spans[spanIdx]) {
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| 114 | col0 += parts[spanIdx].length;
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| 115 | spanIdx++;
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| 116 | }
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| 117 | if (spanIdx < spans.length && lineIdx === 0 && col0 === 0) {
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| 118 | firstOffsetMapped = true;
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| 119 | }
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| 120 | else {
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| 121 | mapFirstOffsetIfNeeded();
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| 122 | }
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| 123 | while (spanIdx < spans.length) {
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| 124 | const span = spans[spanIdx];
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| 125 | const source = span.start.file;
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| 126 | const sourceLine = span.start.line;
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| 127 | const sourceCol = span.start.col;
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| 128 | map.addSource(source.url, source.content)
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| 129 | .addMapping(col0, source.url, sourceLine, sourceCol);
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| 130 | col0 += parts[spanIdx].length;
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| 131 | spanIdx++;
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| 132 | // assign parts without span or the same span to the previous segment
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| 133 | while (spanIdx < spans.length && (span === spans[spanIdx] || !spans[spanIdx])) {
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| 134 | col0 += parts[spanIdx].length;
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| 135 | spanIdx++;
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| 136 | }
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| 137 | }
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| 138 | });
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| 139 | return map;
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| 140 | }
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| 141 | setPreambleLineCount(count) {
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| 142 | return this._preambleLineCount = count;
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| 143 | }
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| 144 | spanOf(line, column) {
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| 145 | const emittedLine = this._lines[line - this._preambleLineCount];
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| 146 | if (emittedLine) {
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| 147 | let columnsLeft = column - _createIndent(emittedLine.indent).length;
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| 148 | for (let partIndex = 0; partIndex < emittedLine.parts.length; partIndex++) {
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| 149 | const part = emittedLine.parts[partIndex];
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| 150 | if (part.length > columnsLeft) {
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| 151 | return emittedLine.srcSpans[partIndex];
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| 152 | }
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| 153 | columnsLeft -= part.length;
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| 154 | }
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| 155 | }
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| 156 | return null;
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| 157 | }
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| 158 | /**
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| 159 | * @internal strip this from published d.ts files due to
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| 160 | * https://github.com/microsoft/TypeScript/issues/36216
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| 161 | */
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| 162 | get sourceLines() {
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| 163 | if (this._lines.length && this._lines[this._lines.length - 1].parts.length === 0) {
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| 164 | return this._lines.slice(0, -1);
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| 165 | }
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| 166 | return this._lines;
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| 167 | }
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| 168 | }
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| 169 | export class AbstractEmitterVisitor {
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| 170 | constructor(_escapeDollarInStrings) {
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| 171 | this._escapeDollarInStrings = _escapeDollarInStrings;
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| 172 | }
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| 173 | printLeadingComments(stmt, ctx) {
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| 174 | if (stmt.leadingComments === undefined) {
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| 175 | return;
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| 176 | }
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| 177 | for (const comment of stmt.leadingComments) {
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| 178 | if (comment instanceof o.JSDocComment) {
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| 179 | ctx.print(stmt, `/*${comment.toString()}*/`, comment.trailingNewline);
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| 180 | }
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| 181 | else {
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| 182 | if (comment.multiline) {
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| 183 | ctx.print(stmt, `/* ${comment.text} */`, comment.trailingNewline);
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| 184 | }
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| 185 | else {
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| 186 | comment.text.split('\n').forEach((line) => {
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| 187 | ctx.println(stmt, `// ${line}`);
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| 188 | });
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| 189 | }
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| 190 | }
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| 191 | }
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| 192 | }
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| 193 | visitExpressionStmt(stmt, ctx) {
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| 194 | this.printLeadingComments(stmt, ctx);
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| 195 | stmt.expr.visitExpression(this, ctx);
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| 196 | ctx.println(stmt, ';');
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| 197 | return null;
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| 198 | }
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| 199 | visitReturnStmt(stmt, ctx) {
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| 200 | this.printLeadingComments(stmt, ctx);
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| 201 | ctx.print(stmt, `return `);
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| 202 | stmt.value.visitExpression(this, ctx);
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| 203 | ctx.println(stmt, ';');
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| 204 | return null;
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| 205 | }
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| 206 | visitIfStmt(stmt, ctx) {
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| 207 | this.printLeadingComments(stmt, ctx);
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| 208 | ctx.print(stmt, `if (`);
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| 209 | stmt.condition.visitExpression(this, ctx);
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| 210 | ctx.print(stmt, `) {`);
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| 211 | const hasElseCase = stmt.falseCase != null && stmt.falseCase.length > 0;
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| 212 | if (stmt.trueCase.length <= 1 && !hasElseCase) {
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| 213 | ctx.print(stmt, ` `);
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| 214 | this.visitAllStatements(stmt.trueCase, ctx);
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| 215 | ctx.removeEmptyLastLine();
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| 216 | ctx.print(stmt, ` `);
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| 217 | }
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| 218 | else {
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| 219 | ctx.println();
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| 220 | ctx.incIndent();
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| 221 | this.visitAllStatements(stmt.trueCase, ctx);
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| 222 | ctx.decIndent();
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| 223 | if (hasElseCase) {
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| 224 | ctx.println(stmt, `} else {`);
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| 225 | ctx.incIndent();
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| 226 | this.visitAllStatements(stmt.falseCase, ctx);
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| 227 | ctx.decIndent();
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| 228 | }
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| 229 | }
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| 230 | ctx.println(stmt, `}`);
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| 231 | return null;
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| 232 | }
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| 233 | visitThrowStmt(stmt, ctx) {
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| 234 | this.printLeadingComments(stmt, ctx);
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| 235 | ctx.print(stmt, `throw `);
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| 236 | stmt.error.visitExpression(this, ctx);
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| 237 | ctx.println(stmt, `;`);
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| 238 | return null;
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| 239 | }
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| 240 | visitWriteVarExpr(expr, ctx) {
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| 241 | const lineWasEmpty = ctx.lineIsEmpty();
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| 242 | if (!lineWasEmpty) {
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| 243 | ctx.print(expr, '(');
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| 244 | }
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| 245 | ctx.print(expr, `${expr.name} = `);
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| 246 | expr.value.visitExpression(this, ctx);
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| 247 | if (!lineWasEmpty) {
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| 248 | ctx.print(expr, ')');
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| 249 | }
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| 250 | return null;
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| 251 | }
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| 252 | visitWriteKeyExpr(expr, ctx) {
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| 253 | const lineWasEmpty = ctx.lineIsEmpty();
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| 254 | if (!lineWasEmpty) {
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| 255 | ctx.print(expr, '(');
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| 256 | }
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| 257 | expr.receiver.visitExpression(this, ctx);
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| 258 | ctx.print(expr, `[`);
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| 259 | expr.index.visitExpression(this, ctx);
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| 260 | ctx.print(expr, `] = `);
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| 261 | expr.value.visitExpression(this, ctx);
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| 262 | if (!lineWasEmpty) {
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| 263 | ctx.print(expr, ')');
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| 264 | }
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| 265 | return null;
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| 266 | }
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| 267 | visitWritePropExpr(expr, ctx) {
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| 268 | const lineWasEmpty = ctx.lineIsEmpty();
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| 269 | if (!lineWasEmpty) {
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| 270 | ctx.print(expr, '(');
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| 271 | }
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| 272 | expr.receiver.visitExpression(this, ctx);
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| 273 | ctx.print(expr, `.${expr.name} = `);
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| 274 | expr.value.visitExpression(this, ctx);
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| 275 | if (!lineWasEmpty) {
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| 276 | ctx.print(expr, ')');
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| 277 | }
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| 278 | return null;
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| 279 | }
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| 280 | visitInvokeMethodExpr(expr, ctx) {
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| 281 | expr.receiver.visitExpression(this, ctx);
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| 282 | let name = expr.name;
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| 283 | if (expr.builtin != null) {
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| 284 | name = this.getBuiltinMethodName(expr.builtin);
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| 285 | if (name == null) {
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| 286 | // some builtins just mean to skip the call.
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| 287 | return null;
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| 288 | }
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| 289 | }
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| 290 | ctx.print(expr, `.${name}(`);
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| 291 | this.visitAllExpressions(expr.args, ctx, `,`);
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| 292 | ctx.print(expr, `)`);
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| 293 | return null;
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| 294 | }
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| 295 | visitInvokeFunctionExpr(expr, ctx) {
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| 296 | expr.fn.visitExpression(this, ctx);
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| 297 | ctx.print(expr, `(`);
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| 298 | this.visitAllExpressions(expr.args, ctx, ',');
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| 299 | ctx.print(expr, `)`);
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| 300 | return null;
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| 301 | }
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| 302 | visitTaggedTemplateExpr(expr, ctx) {
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| 303 | expr.tag.visitExpression(this, ctx);
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| 304 | ctx.print(expr, '`' + expr.template.elements[0].rawText);
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| 305 | for (let i = 1; i < expr.template.elements.length; i++) {
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| 306 | ctx.print(expr, '${');
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| 307 | expr.template.expressions[i - 1].visitExpression(this, ctx);
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| 308 | ctx.print(expr, `}${expr.template.elements[i].rawText}`);
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| 309 | }
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| 310 | ctx.print(expr, '`');
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| 311 | return null;
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| 312 | }
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| 313 | visitWrappedNodeExpr(ast, ctx) {
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| 314 | throw new Error('Abstract emitter cannot visit WrappedNodeExpr.');
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| 315 | }
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| 316 | visitTypeofExpr(expr, ctx) {
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| 317 | ctx.print(expr, 'typeof ');
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| 318 | expr.expr.visitExpression(this, ctx);
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| 319 | }
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| 320 | visitReadVarExpr(ast, ctx) {
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| 321 | let varName = ast.name;
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| 322 | if (ast.builtin != null) {
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| 323 | switch (ast.builtin) {
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| 324 | case o.BuiltinVar.Super:
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| 325 | varName = 'super';
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| 326 | break;
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| 327 | case o.BuiltinVar.This:
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| 328 | varName = 'this';
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| 329 | break;
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| 330 | case o.BuiltinVar.CatchError:
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| 331 | varName = CATCH_ERROR_VAR.name;
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| 332 | break;
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| 333 | case o.BuiltinVar.CatchStack:
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| 334 | varName = CATCH_STACK_VAR.name;
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| 335 | break;
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| 336 | default:
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| 337 | throw new Error(`Unknown builtin variable ${ast.builtin}`);
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| 338 | }
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| 339 | }
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| 340 | ctx.print(ast, varName);
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| 341 | return null;
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| 342 | }
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| 343 | visitInstantiateExpr(ast, ctx) {
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| 344 | ctx.print(ast, `new `);
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| 345 | ast.classExpr.visitExpression(this, ctx);
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| 346 | ctx.print(ast, `(`);
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| 347 | this.visitAllExpressions(ast.args, ctx, ',');
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| 348 | ctx.print(ast, `)`);
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| 349 | return null;
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| 350 | }
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| 351 | visitLiteralExpr(ast, ctx) {
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| 352 | const value = ast.value;
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| 353 | if (typeof value === 'string') {
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| 354 | ctx.print(ast, escapeIdentifier(value, this._escapeDollarInStrings));
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| 355 | }
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| 356 | else {
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| 357 | ctx.print(ast, `${value}`);
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| 358 | }
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| 359 | return null;
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| 360 | }
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| 361 | visitLocalizedString(ast, ctx) {
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| 362 | const head = ast.serializeI18nHead();
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| 363 | ctx.print(ast, '$localize `' + head.raw);
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| 364 | for (let i = 1; i < ast.messageParts.length; i++) {
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| 365 | ctx.print(ast, '${');
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| 366 | ast.expressions[i - 1].visitExpression(this, ctx);
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| 367 | ctx.print(ast, `}${ast.serializeI18nTemplatePart(i).raw}`);
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| 368 | }
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| 369 | ctx.print(ast, '`');
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| 370 | return null;
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| 371 | }
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| 372 | visitConditionalExpr(ast, ctx) {
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| 373 | ctx.print(ast, `(`);
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| 374 | ast.condition.visitExpression(this, ctx);
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| 375 | ctx.print(ast, '? ');
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| 376 | ast.trueCase.visitExpression(this, ctx);
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| 377 | ctx.print(ast, ': ');
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| 378 | ast.falseCase.visitExpression(this, ctx);
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| 379 | ctx.print(ast, `)`);
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| 380 | return null;
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| 381 | }
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| 382 | visitNotExpr(ast, ctx) {
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| 383 | ctx.print(ast, '!');
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| 384 | ast.condition.visitExpression(this, ctx);
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| 385 | return null;
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| 386 | }
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| 387 | visitAssertNotNullExpr(ast, ctx) {
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| 388 | ast.condition.visitExpression(this, ctx);
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| 389 | return null;
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| 390 | }
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| 391 | visitUnaryOperatorExpr(ast, ctx) {
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| 392 | let opStr;
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| 393 | switch (ast.operator) {
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| 394 | case o.UnaryOperator.Plus:
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| 395 | opStr = '+';
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| 396 | break;
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| 397 | case o.UnaryOperator.Minus:
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| 398 | opStr = '-';
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| 399 | break;
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| 400 | default:
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| 401 | throw new Error(`Unknown operator ${ast.operator}`);
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| 402 | }
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| 403 | if (ast.parens)
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| 404 | ctx.print(ast, `(`);
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| 405 | ctx.print(ast, opStr);
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| 406 | ast.expr.visitExpression(this, ctx);
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| 407 | if (ast.parens)
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| 408 | ctx.print(ast, `)`);
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| 409 | return null;
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| 410 | }
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| 411 | visitBinaryOperatorExpr(ast, ctx) {
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| 412 | let opStr;
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| 413 | switch (ast.operator) {
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| 414 | case o.BinaryOperator.Equals:
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| 415 | opStr = '==';
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| 416 | break;
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| 417 | case o.BinaryOperator.Identical:
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| 418 | opStr = '===';
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| 419 | break;
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| 420 | case o.BinaryOperator.NotEquals:
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| 421 | opStr = '!=';
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| 422 | break;
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| 423 | case o.BinaryOperator.NotIdentical:
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| 424 | opStr = '!==';
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| 425 | break;
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| 426 | case o.BinaryOperator.And:
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| 427 | opStr = '&&';
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| 428 | break;
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| 429 | case o.BinaryOperator.BitwiseAnd:
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| 430 | opStr = '&';
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| 431 | break;
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| 432 | case o.BinaryOperator.Or:
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| 433 | opStr = '||';
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| 434 | break;
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| 435 | case o.BinaryOperator.Plus:
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| 436 | opStr = '+';
|
---|
| 437 | break;
|
---|
| 438 | case o.BinaryOperator.Minus:
|
---|
| 439 | opStr = '-';
|
---|
| 440 | break;
|
---|
| 441 | case o.BinaryOperator.Divide:
|
---|
| 442 | opStr = '/';
|
---|
| 443 | break;
|
---|
| 444 | case o.BinaryOperator.Multiply:
|
---|
| 445 | opStr = '*';
|
---|
| 446 | break;
|
---|
| 447 | case o.BinaryOperator.Modulo:
|
---|
| 448 | opStr = '%';
|
---|
| 449 | break;
|
---|
| 450 | case o.BinaryOperator.Lower:
|
---|
| 451 | opStr = '<';
|
---|
| 452 | break;
|
---|
| 453 | case o.BinaryOperator.LowerEquals:
|
---|
| 454 | opStr = '<=';
|
---|
| 455 | break;
|
---|
| 456 | case o.BinaryOperator.Bigger:
|
---|
| 457 | opStr = '>';
|
---|
| 458 | break;
|
---|
| 459 | case o.BinaryOperator.BiggerEquals:
|
---|
| 460 | opStr = '>=';
|
---|
| 461 | break;
|
---|
| 462 | case o.BinaryOperator.NullishCoalesce:
|
---|
| 463 | opStr = '??';
|
---|
| 464 | break;
|
---|
| 465 | default:
|
---|
| 466 | throw new Error(`Unknown operator ${ast.operator}`);
|
---|
| 467 | }
|
---|
| 468 | if (ast.parens)
|
---|
| 469 | ctx.print(ast, `(`);
|
---|
| 470 | ast.lhs.visitExpression(this, ctx);
|
---|
| 471 | ctx.print(ast, ` ${opStr} `);
|
---|
| 472 | ast.rhs.visitExpression(this, ctx);
|
---|
| 473 | if (ast.parens)
|
---|
| 474 | ctx.print(ast, `)`);
|
---|
| 475 | return null;
|
---|
| 476 | }
|
---|
| 477 | visitReadPropExpr(ast, ctx) {
|
---|
| 478 | ast.receiver.visitExpression(this, ctx);
|
---|
| 479 | ctx.print(ast, `.`);
|
---|
| 480 | ctx.print(ast, ast.name);
|
---|
| 481 | return null;
|
---|
| 482 | }
|
---|
| 483 | visitReadKeyExpr(ast, ctx) {
|
---|
| 484 | ast.receiver.visitExpression(this, ctx);
|
---|
| 485 | ctx.print(ast, `[`);
|
---|
| 486 | ast.index.visitExpression(this, ctx);
|
---|
| 487 | ctx.print(ast, `]`);
|
---|
| 488 | return null;
|
---|
| 489 | }
|
---|
| 490 | visitLiteralArrayExpr(ast, ctx) {
|
---|
| 491 | ctx.print(ast, `[`);
|
---|
| 492 | this.visitAllExpressions(ast.entries, ctx, ',');
|
---|
| 493 | ctx.print(ast, `]`);
|
---|
| 494 | return null;
|
---|
| 495 | }
|
---|
| 496 | visitLiteralMapExpr(ast, ctx) {
|
---|
| 497 | ctx.print(ast, `{`);
|
---|
| 498 | this.visitAllObjects(entry => {
|
---|
| 499 | ctx.print(ast, `${escapeIdentifier(entry.key, this._escapeDollarInStrings, entry.quoted)}:`);
|
---|
| 500 | entry.value.visitExpression(this, ctx);
|
---|
| 501 | }, ast.entries, ctx, ',');
|
---|
| 502 | ctx.print(ast, `}`);
|
---|
| 503 | return null;
|
---|
| 504 | }
|
---|
| 505 | visitCommaExpr(ast, ctx) {
|
---|
| 506 | ctx.print(ast, '(');
|
---|
| 507 | this.visitAllExpressions(ast.parts, ctx, ',');
|
---|
| 508 | ctx.print(ast, ')');
|
---|
| 509 | return null;
|
---|
| 510 | }
|
---|
| 511 | visitAllExpressions(expressions, ctx, separator) {
|
---|
| 512 | this.visitAllObjects(expr => expr.visitExpression(this, ctx), expressions, ctx, separator);
|
---|
| 513 | }
|
---|
| 514 | visitAllObjects(handler, expressions, ctx, separator) {
|
---|
| 515 | let incrementedIndent = false;
|
---|
| 516 | for (let i = 0; i < expressions.length; i++) {
|
---|
| 517 | if (i > 0) {
|
---|
| 518 | if (ctx.lineLength() > 80) {
|
---|
| 519 | ctx.print(null, separator, true);
|
---|
| 520 | if (!incrementedIndent) {
|
---|
| 521 | // continuation are marked with double indent.
|
---|
| 522 | ctx.incIndent();
|
---|
| 523 | ctx.incIndent();
|
---|
| 524 | incrementedIndent = true;
|
---|
| 525 | }
|
---|
| 526 | }
|
---|
| 527 | else {
|
---|
| 528 | ctx.print(null, separator, false);
|
---|
| 529 | }
|
---|
| 530 | }
|
---|
| 531 | handler(expressions[i]);
|
---|
| 532 | }
|
---|
| 533 | if (incrementedIndent) {
|
---|
| 534 | // continuation are marked with double indent.
|
---|
| 535 | ctx.decIndent();
|
---|
| 536 | ctx.decIndent();
|
---|
| 537 | }
|
---|
| 538 | }
|
---|
| 539 | visitAllStatements(statements, ctx) {
|
---|
| 540 | statements.forEach((stmt) => stmt.visitStatement(this, ctx));
|
---|
| 541 | }
|
---|
| 542 | }
|
---|
| 543 | export function escapeIdentifier(input, escapeDollar, alwaysQuote = true) {
|
---|
| 544 | if (input == null) {
|
---|
| 545 | return null;
|
---|
| 546 | }
|
---|
| 547 | const body = input.replace(_SINGLE_QUOTE_ESCAPE_STRING_RE, (...match) => {
|
---|
| 548 | if (match[0] == '$') {
|
---|
| 549 | return escapeDollar ? '\\$' : '$';
|
---|
| 550 | }
|
---|
| 551 | else if (match[0] == '\n') {
|
---|
| 552 | return '\\n';
|
---|
| 553 | }
|
---|
| 554 | else if (match[0] == '\r') {
|
---|
| 555 | return '\\r';
|
---|
| 556 | }
|
---|
| 557 | else {
|
---|
| 558 | return `\\${match[0]}`;
|
---|
| 559 | }
|
---|
| 560 | });
|
---|
| 561 | const requiresQuotes = alwaysQuote || !_LEGAL_IDENTIFIER_RE.test(body);
|
---|
| 562 | return requiresQuotes ? `'${body}'` : body;
|
---|
| 563 | }
|
---|
| 564 | function _createIndent(count) {
|
---|
| 565 | let res = '';
|
---|
| 566 | for (let i = 0; i < count; i++) {
|
---|
| 567 | res += _INDENT_WITH;
|
---|
| 568 | }
|
---|
| 569 | return res;
|
---|
| 570 | }
|
---|
| 571 | //# 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return new EmitterVisitorContext(0);\n  }\n\n  private _lines: _EmittedLine[];\n  private _classes: o.ClassStmt[] = [];\n  private _preambleLineCount = 0;\n\n  constructor(private _indent: number) {\n    this._lines = [new _EmittedLine(_indent)];\n  }\n\n  /**\n   * @internal strip this from published d.ts files due to\n   * https://github.com/microsoft/TypeScript/issues/36216\n   */\n  private get _currentLine(): _EmittedLine {\n    return this._lines[this._lines.length - 1];\n  }\n\n  println(from?: {sourceSpan: ParseSourceSpan|null}|null, lastPart: string = ''): void {\n    this.print(from || null, lastPart, true);\n  }\n\n  lineIsEmpty(): boolean {\n    return this._currentLine.parts.length === 0;\n  }\n\n  lineLength(): number {\n    return this._currentLine.indent * _INDENT_WITH.length + this._currentLine.partsLength;\n  }\n\n  print(from: {sourceSpan: ParseSourceSpan|null}|null, part: string, newLine: boolean = false) {\n    if (part.length > 0) {\n      this._currentLine.parts.push(part);\n      this._currentLine.partsLength += part.length;\n      this._currentLine.srcSpans.push(from && from.sourceSpan || null);\n    }\n    if (newLine) {\n      this._lines.push(new _EmittedLine(this._indent));\n    }\n  }\n\n  removeEmptyLastLine() {\n    if (this.lineIsEmpty()) {\n      this._lines.pop();\n    }\n  }\n\n  incIndent() {\n    this._indent++;\n    if (this.lineIsEmpty()) {\n      this._currentLine.indent = this._indent;\n    }\n  }\n\n  decIndent() {\n    this._indent--;\n    if (this.lineIsEmpty()) {\n      this._currentLine.indent = this._indent;\n    }\n  }\n\n  pushClass(clazz: o.ClassStmt) {\n    this._classes.push(clazz);\n  }\n\n  popClass(): o.ClassStmt {\n    return this._classes.pop()!;\n  }\n\n  get currentClass(): o.ClassStmt|null {\n    return this._classes.length > 0 ? this._classes[this._classes.length - 1] : null;\n  }\n\n  toSource(): string {\n    return this.sourceLines\n        .map(l => l.parts.length > 0 ? _createIndent(l.indent) + l.parts.join('') : '')\n        .join('\\n');\n  }\n\n  toSourceMapGenerator(genFilePath: string, startsAtLine: number = 0): SourceMapGenerator {\n    const map = new SourceMapGenerator(genFilePath);\n\n    let firstOffsetMapped = false;\n    const mapFirstOffsetIfNeeded = () => {\n      if (!firstOffsetMapped) {\n        // Add a single space so that tools won't try to load the file from disk.\n        // Note: We are using virtual urls like `ng:///`, so we have to\n        // provide a content here.\n        map.addSource(genFilePath, ' ').addMapping(0, genFilePath, 0, 0);\n        firstOffsetMapped = true;\n      }\n    };\n\n    for (let i = 0; i < startsAtLine; i++) {\n      map.addLine();\n      mapFirstOffsetIfNeeded();\n    }\n\n    this.sourceLines.forEach((line, lineIdx) => {\n      map.addLine();\n\n      const spans = line.srcSpans;\n      const parts = line.parts;\n      let col0 = line.indent * _INDENT_WITH.length;\n      let spanIdx = 0;\n      // skip leading parts without source spans\n      while (spanIdx < spans.length && !spans[spanIdx]) {\n        col0 += parts[spanIdx].length;\n        spanIdx++;\n      }\n      if (spanIdx < spans.length && lineIdx === 0 && col0 === 0) {\n        firstOffsetMapped = true;\n      } else {\n        mapFirstOffsetIfNeeded();\n      }\n\n      while (spanIdx < spans.length) {\n        const span = spans[spanIdx]!;\n        const source = span.start.file;\n        const sourceLine = span.start.line;\n        const sourceCol = span.start.col;\n        map.addSource(source.url, source.content)\n            .addMapping(col0, source.url, sourceLine, sourceCol);\n\n        col0 += parts[spanIdx].length;\n        spanIdx++;\n\n        // assign parts without span or the same span to the previous segment\n        while (spanIdx < spans.length && (span === spans[spanIdx] || !spans[spanIdx])) {\n          col0 += parts[spanIdx].length;\n          spanIdx++;\n        }\n      }\n    });\n\n    return map;\n  }\n\n  setPreambleLineCount(count: number) {\n    return this._preambleLineCount = count;\n  }\n\n  spanOf(line: number, column: number): ParseSourceSpan|null {\n    const emittedLine = this._lines[line - this._preambleLineCount];\n    if (emittedLine) {\n      let columnsLeft = column - _createIndent(emittedLine.indent).length;\n      for (let partIndex = 0; partIndex < emittedLine.parts.length; partIndex++) {\n        const part = emittedLine.parts[partIndex];\n        if (part.length > columnsLeft) {\n          return emittedLine.srcSpans[partIndex];\n        }\n        columnsLeft -= part.length;\n      }\n    }\n    return null;\n  }\n\n  /**\n   * @internal strip this from published d.ts files due to\n   * https://github.com/microsoft/TypeScript/issues/36216\n   */\n  private get sourceLines(): _EmittedLine[] {\n    if (this._lines.length && this._lines[this._lines.length - 1].parts.length === 0) {\n      return this._lines.slice(0, -1);\n    }\n    return this._lines;\n  }\n}\n\nexport abstract class AbstractEmitterVisitor implements o.StatementVisitor, o.ExpressionVisitor {\n  constructor(private _escapeDollarInStrings: boolean) {}\n\n  protected printLeadingComments(stmt: o.Statement, ctx: EmitterVisitorContext): void {\n    if (stmt.leadingComments === undefined) {\n      return;\n    }\n    for (const comment of stmt.leadingComments) {\n      if (comment instanceof o.JSDocComment) {\n        ctx.print(stmt, `/*${comment.toString()}*/`, comment.trailingNewline);\n      } else {\n        if (comment.multiline) {\n          ctx.print(stmt, `/* ${comment.text} */`, comment.trailingNewline);\n        } else {\n          comment.text.split('\\n').forEach((line) => {\n            ctx.println(stmt, `// ${line}`);\n          });\n        }\n      }\n    }\n  }\n\n  visitExpressionStmt(stmt: o.ExpressionStatement, ctx: EmitterVisitorContext): any {\n    this.printLeadingComments(stmt, ctx);\n    stmt.expr.visitExpression(this, ctx);\n    ctx.println(stmt, ';');\n    return null;\n  }\n\n  visitReturnStmt(stmt: o.ReturnStatement, ctx: EmitterVisitorContext): any {\n    this.printLeadingComments(stmt, ctx);\n    ctx.print(stmt, `return `);\n    stmt.value.visitExpression(this, ctx);\n    ctx.println(stmt, ';');\n    return null;\n  }\n\n  abstract visitCastExpr(ast: o.CastExpr, context: any): any;\n\n  abstract visitDeclareClassStmt(stmt: o.ClassStmt, ctx: EmitterVisitorContext): any;\n\n  visitIfStmt(stmt: o.IfStmt, ctx: EmitterVisitorContext): any {\n    this.printLeadingComments(stmt, ctx);\n    ctx.print(stmt, `if (`);\n    stmt.condition.visitExpression(this, ctx);\n    ctx.print(stmt, `) {`);\n    const hasElseCase = stmt.falseCase != null && stmt.falseCase.length > 0;\n    if (stmt.trueCase.length <= 1 && !hasElseCase) {\n      ctx.print(stmt, ` `);\n      this.visitAllStatements(stmt.trueCase, ctx);\n      ctx.removeEmptyLastLine();\n      ctx.print(stmt, ` `);\n    } else {\n      ctx.println();\n      ctx.incIndent();\n      this.visitAllStatements(stmt.trueCase, ctx);\n      ctx.decIndent();\n      if (hasElseCase) {\n        ctx.println(stmt, `} else {`);\n        ctx.incIndent();\n        this.visitAllStatements(stmt.falseCase, ctx);\n        ctx.decIndent();\n      }\n    }\n    ctx.println(stmt, `}`);\n    return null;\n  }\n\n  abstract visitTryCatchStmt(stmt: o.TryCatchStmt, ctx: EmitterVisitorContext): any;\n\n  visitThrowStmt(stmt: o.ThrowStmt, ctx: EmitterVisitorContext): any {\n    this.printLeadingComments(stmt, ctx);\n    ctx.print(stmt, `throw `);\n    stmt.error.visitExpression(this, ctx);\n    ctx.println(stmt, `;`);\n    return null;\n  }\n\n  abstract visitDeclareVarStmt(stmt: o.DeclareVarStmt, ctx: EmitterVisitorContext): any;\n\n  visitWriteVarExpr(expr: o.WriteVarExpr, ctx: EmitterVisitorContext): any {\n    const lineWasEmpty = ctx.lineIsEmpty();\n    if (!lineWasEmpty) {\n      ctx.print(expr, '(');\n    }\n    ctx.print(expr, `${expr.name} = `);\n    expr.value.visitExpression(this, ctx);\n    if (!lineWasEmpty) {\n      ctx.print(expr, ')');\n    }\n    return null;\n  }\n  visitWriteKeyExpr(expr: o.WriteKeyExpr, ctx: EmitterVisitorContext): any {\n    const lineWasEmpty = ctx.lineIsEmpty();\n    if (!lineWasEmpty) {\n      ctx.print(expr, '(');\n    }\n    expr.receiver.visitExpression(this, ctx);\n    ctx.print(expr, `[`);\n    expr.index.visitExpression(this, ctx);\n    ctx.print(expr, `] = `);\n    expr.value.visitExpression(this, ctx);\n    if (!lineWasEmpty) {\n      ctx.print(expr, ')');\n    }\n    return null;\n  }\n  visitWritePropExpr(expr: o.WritePropExpr, ctx: EmitterVisitorContext): any {\n    const lineWasEmpty = ctx.lineIsEmpty();\n    if (!lineWasEmpty) {\n      ctx.print(expr, '(');\n    }\n    expr.receiver.visitExpression(this, ctx);\n    ctx.print(expr, `.${expr.name} = `);\n    expr.value.visitExpression(this, ctx);\n    if (!lineWasEmpty) {\n      ctx.print(expr, ')');\n    }\n    return null;\n  }\n  visitInvokeMethodExpr(expr: o.InvokeMethodExpr, ctx: EmitterVisitorContext): any {\n    expr.receiver.visitExpression(this, ctx);\n    let name = expr.name;\n    if (expr.builtin != null) {\n      name = this.getBuiltinMethodName(expr.builtin);\n      if (name == null) {\n        // some builtins just mean to skip the call.\n        return null;\n      }\n    }\n    ctx.print(expr, `.${name}(`);\n    this.visitAllExpressions(expr.args, ctx, `,`);\n    ctx.print(expr, `)`);\n    return null;\n  }\n\n  abstract getBuiltinMethodName(method: o.BuiltinMethod): string;\n\n  visitInvokeFunctionExpr(expr: o.InvokeFunctionExpr, ctx: EmitterVisitorContext): any {\n    expr.fn.visitExpression(this, ctx);\n    ctx.print(expr, `(`);\n    this.visitAllExpressions(expr.args, ctx, ',');\n    ctx.print(expr, `)`);\n    return null;\n  }\n  visitTaggedTemplateExpr(expr: o.TaggedTemplateExpr, ctx: EmitterVisitorContext): any {\n    expr.tag.visitExpression(this, ctx);\n    ctx.print(expr, '`' + expr.template.elements[0].rawText);\n    for (let i = 1; i < expr.template.elements.length; i++) {\n      ctx.print(expr, '${');\n      expr.template.expressions[i - 1].visitExpression(this, ctx);\n      ctx.print(expr, `}${expr.template.elements[i].rawText}`);\n    }\n    ctx.print(expr, '`');\n    return null;\n  }\n  visitWrappedNodeExpr(ast: o.WrappedNodeExpr<any>, ctx: EmitterVisitorContext): any {\n    throw new Error('Abstract emitter cannot visit WrappedNodeExpr.');\n  }\n  visitTypeofExpr(expr: o.TypeofExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(expr, 'typeof ');\n    expr.expr.visitExpression(this, ctx);\n  }\n  visitReadVarExpr(ast: o.ReadVarExpr, ctx: EmitterVisitorContext): any {\n    let varName = ast.name!;\n    if (ast.builtin != null) {\n      switch (ast.builtin) {\n        case o.BuiltinVar.Super:\n          varName = 'super';\n          break;\n        case o.BuiltinVar.This:\n          varName = 'this';\n          break;\n        case o.BuiltinVar.CatchError:\n          varName = CATCH_ERROR_VAR.name!;\n          break;\n        case o.BuiltinVar.CatchStack:\n          varName = CATCH_STACK_VAR.name!;\n          break;\n        default:\n          throw new Error(`Unknown builtin variable ${ast.builtin}`);\n      }\n    }\n    ctx.print(ast, varName);\n    return null;\n  }\n  visitInstantiateExpr(ast: o.InstantiateExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, `new `);\n    ast.classExpr.visitExpression(this, ctx);\n    ctx.print(ast, `(`);\n    this.visitAllExpressions(ast.args, ctx, ',');\n    ctx.print(ast, `)`);\n    return null;\n  }\n\n  visitLiteralExpr(ast: o.LiteralExpr, ctx: EmitterVisitorContext): any {\n    const value = ast.value;\n    if (typeof value === 'string') {\n      ctx.print(ast, escapeIdentifier(value, this._escapeDollarInStrings));\n    } else {\n      ctx.print(ast, `${value}`);\n    }\n    return null;\n  }\n\n  visitLocalizedString(ast: o.LocalizedString, ctx: EmitterVisitorContext): any {\n    const head = ast.serializeI18nHead();\n    ctx.print(ast, '$localize `' + head.raw);\n    for (let i = 1; i < ast.messageParts.length; i++) {\n      ctx.print(ast, '${');\n      ast.expressions[i - 1].visitExpression(this, ctx);\n      ctx.print(ast, `}${ast.serializeI18nTemplatePart(i).raw}`);\n    }\n    ctx.print(ast, '`');\n    return null;\n  }\n\n  abstract visitExternalExpr(ast: o.ExternalExpr, ctx: EmitterVisitorContext): any;\n\n  visitConditionalExpr(ast: o.ConditionalExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, `(`);\n    ast.condition.visitExpression(this, ctx);\n    ctx.print(ast, '? ');\n    ast.trueCase.visitExpression(this, ctx);\n    ctx.print(ast, ': ');\n    ast.falseCase!.visitExpression(this, ctx);\n    ctx.print(ast, `)`);\n    return null;\n  }\n  visitNotExpr(ast: o.NotExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, '!');\n    ast.condition.visitExpression(this, ctx);\n    return null;\n  }\n  visitAssertNotNullExpr(ast: o.AssertNotNull, ctx: EmitterVisitorContext): any {\n    ast.condition.visitExpression(this, ctx);\n    return null;\n  }\n  abstract visitFunctionExpr(ast: o.FunctionExpr, ctx: EmitterVisitorContext): any;\n  abstract visitDeclareFunctionStmt(stmt: o.DeclareFunctionStmt, context: any): any;\n\n  visitUnaryOperatorExpr(ast: o.UnaryOperatorExpr, ctx: EmitterVisitorContext): any {\n    let opStr: string;\n    switch (ast.operator) {\n      case o.UnaryOperator.Plus:\n        opStr = '+';\n        break;\n      case o.UnaryOperator.Minus:\n        opStr = '-';\n        break;\n      default:\n        throw new Error(`Unknown operator ${ast.operator}`);\n    }\n    if (ast.parens) ctx.print(ast, `(`);\n    ctx.print(ast, opStr);\n    ast.expr.visitExpression(this, ctx);\n    if (ast.parens) ctx.print(ast, `)`);\n    return null;\n  }\n\n  visitBinaryOperatorExpr(ast: o.BinaryOperatorExpr, ctx: EmitterVisitorContext): any {\n    let opStr: string;\n    switch (ast.operator) {\n      case o.BinaryOperator.Equals:\n        opStr = '==';\n        break;\n      case o.BinaryOperator.Identical:\n        opStr = '===';\n        break;\n      case o.BinaryOperator.NotEquals:\n        opStr = '!=';\n        break;\n      case o.BinaryOperator.NotIdentical:\n        opStr = '!==';\n        break;\n      case o.BinaryOperator.And:\n        opStr = '&&';\n        break;\n      case o.BinaryOperator.BitwiseAnd:\n        opStr = '&';\n        break;\n      case o.BinaryOperator.Or:\n        opStr = '||';\n        break;\n      case o.BinaryOperator.Plus:\n        opStr = '+';\n        break;\n      case o.BinaryOperator.Minus:\n        opStr = '-';\n        break;\n      case o.BinaryOperator.Divide:\n        opStr = '/';\n        break;\n      case o.BinaryOperator.Multiply:\n        opStr = '*';\n        break;\n      case o.BinaryOperator.Modulo:\n        opStr = '%';\n        break;\n      case o.BinaryOperator.Lower:\n        opStr = '<';\n        break;\n      case o.BinaryOperator.LowerEquals:\n        opStr = '<=';\n        break;\n      case o.BinaryOperator.Bigger:\n        opStr = '>';\n        break;\n      case o.BinaryOperator.BiggerEquals:\n        opStr = '>=';\n        break;\n      case o.BinaryOperator.NullishCoalesce:\n        opStr = '??';\n        break;\n      default:\n        throw new Error(`Unknown operator ${ast.operator}`);\n    }\n    if (ast.parens) ctx.print(ast, `(`);\n    ast.lhs.visitExpression(this, ctx);\n    ctx.print(ast, ` ${opStr} `);\n    ast.rhs.visitExpression(this, ctx);\n    if (ast.parens) ctx.print(ast, `)`);\n    return null;\n  }\n\n  visitReadPropExpr(ast: o.ReadPropExpr, ctx: EmitterVisitorContext): any {\n    ast.receiver.visitExpression(this, ctx);\n    ctx.print(ast, `.`);\n    ctx.print(ast, ast.name);\n    return null;\n  }\n  visitReadKeyExpr(ast: o.ReadKeyExpr, ctx: EmitterVisitorContext): any {\n    ast.receiver.visitExpression(this, ctx);\n    ctx.print(ast, `[`);\n    ast.index.visitExpression(this, ctx);\n    ctx.print(ast, `]`);\n    return null;\n  }\n  visitLiteralArrayExpr(ast: o.LiteralArrayExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, `[`);\n    this.visitAllExpressions(ast.entries, ctx, ',');\n    ctx.print(ast, `]`);\n    return null;\n  }\n  visitLiteralMapExpr(ast: o.LiteralMapExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, `{`);\n    this.visitAllObjects(entry => {\n      ctx.print(ast, `${escapeIdentifier(entry.key, this._escapeDollarInStrings, entry.quoted)}:`);\n      entry.value.visitExpression(this, ctx);\n    }, ast.entries, ctx, ',');\n    ctx.print(ast, `}`);\n    return null;\n  }\n  visitCommaExpr(ast: o.CommaExpr, ctx: EmitterVisitorContext): any {\n    ctx.print(ast, '(');\n    this.visitAllExpressions(ast.parts, ctx, ',');\n    ctx.print(ast, ')');\n    return null;\n  }\n  visitAllExpressions(expressions: o.Expression[], ctx: EmitterVisitorContext, separator: string):\n      void {\n    this.visitAllObjects(expr => expr.visitExpression(this, ctx), expressions, ctx, separator);\n  }\n\n  visitAllObjects<T>(\n      handler: (t: T) => void, expressions: T[], ctx: EmitterVisitorContext,\n      separator: string): void {\n    let incrementedIndent = false;\n    for (let i = 0; i < expressions.length; i++) {\n      if (i > 0) {\n        if (ctx.lineLength() > 80) {\n          ctx.print(null, separator, true);\n          if (!incrementedIndent) {\n            // continuation are marked with double indent.\n            ctx.incIndent();\n            ctx.incIndent();\n            incrementedIndent = true;\n          }\n        } else {\n          ctx.print(null, separator, false);\n        }\n      }\n      handler(expressions[i]);\n    }\n    if (incrementedIndent) {\n      // continuation are marked with double indent.\n      ctx.decIndent();\n      ctx.decIndent();\n    }\n  }\n\n  visitAllStatements(statements: o.Statement[], ctx: EmitterVisitorContext): void {\n    statements.forEach((stmt) => stmt.visitStatement(this, ctx));\n  }\n}\n\nexport function escapeIdentifier(\n    input: string, escapeDollar: boolean, alwaysQuote: boolean = true): any {\n  if (input == null) {\n    return null;\n  }\n  const body = input.replace(_SINGLE_QUOTE_ESCAPE_STRING_RE, (...match: string[]) => {\n    if (match[0] == '$') {\n      return escapeDollar ? '\\\\$' : '$';\n    } else if (match[0] == '\\n') {\n      return '\\\\n';\n    } else if (match[0] == '\\r') {\n      return '\\\\r';\n    } else {\n      return `\\\\${match[0]}`;\n    }\n  });\n  const requiresQuotes = alwaysQuote || !_LEGAL_IDENTIFIER_RE.test(body);\n  return requiresQuotes ? `'${body}'` : body;\n}\n\nfunction _createIndent(count: number): string {\n  let res = '';\n  for (let i = 0; i < count; i++) {\n    res += _INDENT_WITH;\n  }\n  return res;\n}\n"]} |
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