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Emit source positions for open/close braces #47924

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Merged
merged 4 commits into from
Sep 23, 2023
Merged

Emit source positions for open/close braces #47924

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edc34e8
Emit source positions for open/close braces
rbuckton Feb 16, 2022
fa26451
Merge branch 'main' into braceSourceMaps
rbuckton Sep 23, 2023
eb3ee31
Fix merge issue in tests
rbuckton Sep 23, 2023
d6a2502
Fix formatting
rbuckton Sep 23, 2023
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15 changes: 14 additions & 1 deletion src/compiler/emitter.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -927,6 +927,7 @@ export function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFi
inlineSourceMap: compilerOptions.inlineSourceMap,
extendedDiagnostics: compilerOptions.extendedDiagnostics,
onlyPrintJsDocStyle: true,
omitBraceSourceMapPositions: true,
writeBundleFileInfo: !!bundleBuildInfo,
recordInternalSection: !!bundleBuildInfo,
relativeToBuildInfo,
Expand Down Expand Up @@ -1391,6 +1392,7 @@ export function createPrinter(printerOptions: PrinterOptions = {}, handlers: Pri
} = handlers;

var extendedDiagnostics = !!printerOptions.extendedDiagnostics;
var omitBraceSourcePositions = !!printerOptions.omitBraceSourceMapPositions;
var newLine = getNewLineCharacter(printerOptions);
var moduleKind = getEmitModuleKind(printerOptions);
var bundledHelpers = new Map<string, boolean>();
Expand Down Expand Up @@ -3578,7 +3580,18 @@ export function createPrinter(printerOptions: PrinterOptions = {}, handlers: Pri
decreaseIndent();
}
}
pos = writeTokenText(token, writer, pos);

// We don't emit source positions for most tokens as it tends to be quite noisy, however
// we need to emit source positions for open and close braces so that tools like istanbul
// can map branches for code coverage. However, we still omit brace source positions when
// the output is a declaration file.
if (!omitBraceSourcePositions && (token === SyntaxKind.OpenBraceToken || token === SyntaxKind.CloseBraceToken)) {
pos = writeToken(token, pos, writer, contextNode);
}
else {
pos = writeTokenText(token, writer, pos);
}

if (isSimilarNode && contextNode.end !== pos) {
const isJsxExprContext = contextNode.kind === SyntaxKind.JsxExpression;
emitTrailingCommentsOfPosition(pos, /*prefixSpace*/ !isJsxExprContext, /*forceNoNewline*/ isJsxExprContext);
Expand Down
1 change: 1 addition & 0 deletions src/compiler/types.ts
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Expand Up @@ -9458,6 +9458,7 @@ export interface PrinterOptions {
/** @internal */ sourceMap?: boolean;
/** @internal */ inlineSourceMap?: boolean;
/** @internal */ inlineSources?: boolean;
/** @internal*/ omitBraceSourceMapPositions?: boolean;
/** @internal */ extendedDiagnostics?: boolean;
/** @internal */ onlyPrintJsDocStyle?: boolean;
/** @internal */ neverAsciiEscape?: boolean;
Expand Down
4 changes: 2 additions & 2 deletions tests/baselines/reference/ES5For-of1.js.map
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14 changes: 10 additions & 4 deletions tests/baselines/reference/ES5For-of1.sourcemap.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ sourceFile:ES5For-of1.ts
14> ^^
15> ^^^^
16> ^^
17> ^
1 >
2 >for (var v of
3 > ['a', 'b', 'c']
Expand All @@ -41,6 +42,7 @@ sourceFile:ES5For-of1.ts
14>
15> ['a', 'b', 'c']
16> )
17> {
1 >Emitted(1, 1) Source(1, 1) + SourceIndex(0)
2 >Emitted(1, 6) Source(1, 15) + SourceIndex(0)
3 >Emitted(1, 16) Source(1, 30) + SourceIndex(0)
Expand All @@ -57,6 +59,7 @@ sourceFile:ES5For-of1.ts
14>Emitted(1, 56) Source(1, 15) + SourceIndex(0)
15>Emitted(1, 60) Source(1, 30) + SourceIndex(0)
16>Emitted(1, 62) Source(1, 32) + SourceIndex(0)
17>Emitted(1, 63) Source(1, 33) + SourceIndex(0)
---
>>> var v = _a[_i];
1 >^^^^
Expand Down Expand Up @@ -101,10 +104,13 @@ sourceFile:ES5For-of1.ts
8 >Emitted(3, 20) Source(2, 20) + SourceIndex(0)
---
>>>}
1 >^
2 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
2 >^
3 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
>}
1 >Emitted(4, 2) Source(3, 2) + SourceIndex(0)
>
2 >}
1 >Emitted(4, 1) Source(3, 1) + SourceIndex(0)
2 >Emitted(4, 2) Source(3, 2) + SourceIndex(0)
---
>>>//# sourceMappingURL=ES5For-of1.js.map
4 changes: 2 additions & 2 deletions tests/baselines/reference/ES5For-of13.js.map
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14 changes: 10 additions & 4 deletions tests/baselines/reference/ES5For-of13.sourcemap.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ sourceFile:ES5For-of13.ts
14> ^^
15> ^^^^
16> ^^
17> ^
1 >
2 >for (let v of
3 > ['a', 'b', 'c']
Expand All @@ -41,6 +42,7 @@ sourceFile:ES5For-of13.ts
14>
15> ['a', 'b', 'c']
16> )
17> {
1 >Emitted(1, 1) Source(1, 1) + SourceIndex(0)
2 >Emitted(1, 6) Source(1, 15) + SourceIndex(0)
3 >Emitted(1, 16) Source(1, 30) + SourceIndex(0)
Expand All @@ -57,6 +59,7 @@ sourceFile:ES5For-of13.ts
14>Emitted(1, 56) Source(1, 15) + SourceIndex(0)
15>Emitted(1, 60) Source(1, 30) + SourceIndex(0)
16>Emitted(1, 62) Source(1, 32) + SourceIndex(0)
17>Emitted(1, 63) Source(1, 33) + SourceIndex(0)
---
>>> var v = _a[_i];
1 >^^^^
Expand Down Expand Up @@ -94,10 +97,13 @@ sourceFile:ES5For-of13.ts
6 >Emitted(3, 15) Source(2, 15) + SourceIndex(0)
---
>>>}
1 >^
2 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
2 >^
3 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
>}
1 >Emitted(4, 2) Source(3, 2) + SourceIndex(0)
>
2 >}
1 >Emitted(4, 1) Source(3, 1) + SourceIndex(0)
2 >Emitted(4, 2) Source(3, 2) + SourceIndex(0)
---
>>>//# sourceMappingURL=ES5For-of13.js.map
4 changes: 2 additions & 2 deletions tests/baselines/reference/ES5For-of25.js.map
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14 changes: 10 additions & 4 deletions tests/baselines/reference/ES5For-of25.sourcemap.txt
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Expand Up @@ -58,6 +58,7 @@ sourceFile:ES5For-of25.ts
8 > ^^
9 > ^^^^
10> ^^
11> ^
1->
>
2 >for (var v of
Expand All @@ -69,6 +70,7 @@ sourceFile:ES5For-of25.ts
8 >
9 > a
10> )
11> {
1->Emitted(2, 1) Source(2, 1) + SourceIndex(0)
2 >Emitted(2, 6) Source(2, 15) + SourceIndex(0)
3 >Emitted(2, 16) Source(2, 16) + SourceIndex(0)
Expand All @@ -79,6 +81,7 @@ sourceFile:ES5For-of25.ts
8 >Emitted(2, 44) Source(2, 15) + SourceIndex(0)
9 >Emitted(2, 48) Source(2, 16) + SourceIndex(0)
10>Emitted(2, 50) Source(2, 18) + SourceIndex(0)
11>Emitted(2, 51) Source(2, 19) + SourceIndex(0)
---
>>> var v = a_1[_i];
1 >^^^^
Expand Down Expand Up @@ -120,10 +123,13 @@ sourceFile:ES5For-of25.ts
3 >Emitted(5, 7) Source(4, 7) + SourceIndex(0)
---
>>>}
1 >^
2 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
2 >^
3 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
>}
1 >Emitted(6, 2) Source(5, 2) + SourceIndex(0)
>
2 >}
1 >Emitted(6, 1) Source(5, 1) + SourceIndex(0)
2 >Emitted(6, 2) Source(5, 2) + SourceIndex(0)
---
>>>//# sourceMappingURL=ES5For-of25.js.map
4 changes: 2 additions & 2 deletions tests/baselines/reference/ES5For-of26.js.map
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16 changes: 11 additions & 5 deletions tests/baselines/reference/ES5For-of26.sourcemap.txt
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Expand Up @@ -23,7 +23,8 @@ sourceFile:ES5For-of26.ts
12> ^^
13> ^^^^
14> ^^
15> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
15> ^
16> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
2 >for (var [a = 0, b = 1] of
3 > [2, 3]
Expand All @@ -38,6 +39,7 @@ sourceFile:ES5For-of26.ts
12>
13> [2, 3]
14> )
15> {
1 >Emitted(1, 1) Source(1, 1) + SourceIndex(0)
2 >Emitted(1, 6) Source(1, 28) + SourceIndex(0)
3 >Emitted(1, 16) Source(1, 34) + SourceIndex(0)
Expand All @@ -52,6 +54,7 @@ sourceFile:ES5For-of26.ts
12>Emitted(1, 47) Source(1, 28) + SourceIndex(0)
13>Emitted(1, 51) Source(1, 34) + SourceIndex(0)
14>Emitted(1, 53) Source(1, 36) + SourceIndex(0)
15>Emitted(1, 54) Source(1, 37) + SourceIndex(0)
---
>>> var _b = _a[_i], _c = _b[0], a = _c === void 0 ? 0 : _c, _d = _b[1], b = _d === void 0 ? 1 : _d;
1->^^^^
Expand Down Expand Up @@ -132,10 +135,13 @@ sourceFile:ES5For-of26.ts
3 >Emitted(4, 7) Source(3, 7) + SourceIndex(0)
---
>>>}
1 >^
2 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
2 >^
3 > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^->
1 >
>}
1 >Emitted(5, 2) Source(4, 2) + SourceIndex(0)
>
2 >}
1 >Emitted(5, 1) Source(4, 1) + SourceIndex(0)
2 >Emitted(5, 2) Source(4, 2) + SourceIndex(0)
---
>>>//# sourceMappingURL=ES5For-of26.js.map
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