Misc source map fixes

[jakebailey]

Pulling these out of my ES2022 branch; these are misc sourcemap related fixes that remove a lot of diffs.

[Copilot]

Pull request overview

This PR aligns tsgo’s source map emission with the reference TypeScript emitter, reducing baseline diffs across a wide set of sourcemap validation fixtures.

Changes:

• Adjust source map range selection for var-like declarations (enum vs non-enum) in the runtime syntax transformer.
• Refine printer sourcemap behavior by skipping trivia for token sourcemap positions and suppressing sourcemaps for function bodies.
• Update/clean reference baselines (many .diff files removed and .sourcemap.txt / .js.map.diff updated) to reflect the corrected emitter behavior.

Reviewed changes

Copilot reviewed 73 out of 333 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
testdata/baselines/reference/submodule/compiler/sourceMapValidationDestructuringForArrayBindingPattern(target=es2015).sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMapValidationDestructuringForArrayBindingPattern(target=es2015).sourcemap.txt	Updated expected sourcemap output to match new emitter behavior.
testdata/baselines/reference/submodule/compiler/sourceMapValidationDecorators(target=es2015).sourcemap.txt.diff	Updated baseline diff to reflect reduced/shifted mapping differences.
testdata/baselines/reference/submodule/compiler/sourceMapValidationDecorators(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapValidationClasses.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapValidationClass(target=es2015).sourcemap.txt.diff	Updated baseline diff to reflect new token/body mapping behavior.
testdata/baselines/reference/submodule/compiler/sourceMapValidationClass(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapSample.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionWithCommentPrecedingStatement01.sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionWithCommentPrecedingStatement01.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionWithCommentPrecedingStatement01.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionInInternalModuleWithCommentPrecedingStatement01.sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionInInternalModuleWithCommentPrecedingStatement01.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMapForFunctionInInternalModuleWithCommentPrecedingStatement01.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/sourceMap-StringLiteralWithNewLine(target=es2015).sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMap-StringLiteralWithNewLine(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMap-StringLiteralWithNewLine(target=es2015).js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/sourceMap-FileWithComments.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMap-Comments2(target=es2015).sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMap-Comments2(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/sourceMap-Comments2(target=es2015).js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/sourceMap-Comments(target=es2015).sourcemap.txt.diff	Reduced baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/sourceMap-Comments(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern2.sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern2.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern2.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern1.sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern1.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/restParameterWithBindingPattern1.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/properties(target=es2015).sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/properties(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/properties(target=es2015).js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/out-flag(target=es2015).sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/out-flag(target=es2015).sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/out-flag(target=es2015).js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/jsxFactoryQualifiedNameResolutionError.sourcemap.txt.diff	Updated baseline diff to reflect new token/body mapping behavior.
testdata/baselines/reference/submodule/compiler/jsxFactoryQualifiedNameResolutionError.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsxFactoryQualifiedNameResolutionError.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/jsxFactoryQualifiedName.sourcemap.txt.diff	Reduced baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/jsxFactoryQualifiedName.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierWithAbsentParameter.sourcemap.txt.diff	Updated baseline diff to reflect new token/body mapping behavior.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierWithAbsentParameter.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierWithAbsentParameter.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierAsParameter.sourcemap.txt.diff	Updated baseline diff to reflect new token/body mapping behavior.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierAsParameter.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifierAsParameter.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifier.sourcemap.txt.diff	Reduced baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/jsxFactoryIdentifier.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsFileCompilationWithMapFileAsJsWithOutDir.sourcemap.txt.diff	Removed resolved baseline diff after sourcemap alignment.
testdata/baselines/reference/submodule/compiler/jsFileCompilationWithMapFileAsJsWithOutDir.sourcemap.txt	Updated expected sourcemap output.
testdata/baselines/reference/submodule/compiler/jsFileCompilationWithMapFileAsJsWithOutDir.js.map.diff	Updated expected .js.map diff output.
testdata/baselines/reference/submodule/compiler/derivedClassConstructorWithExplicitReturns01(target=es2015).sourcemap.txt.diff	Updated baseline diff to reflect new token/body mapping behavior.
testdata/baselines/reference/submodule/compiler/derivedClassConstructorWithExplicitReturns01(target=es2015).sourcemap.txt	Updated expected sourcemap output.
internal/transformers/tstransforms/runtimesyntax.go	Adjusted which node receives the source map range for var declarations (enum vs non-enum).
internal/printer/printer.go	Updated source map and comment emission logic (skip trivia for token positions; suppress sourcemaps for function bodies).

[Copilot]

emitSourceMapsBeforeToken now unconditionally dereferences p.currentSourceFile when pos >= 0. If the printer is used in a context where p.currentSourceFile is nil (e.g. printing detached/synthetic nodes while sourcemaps are enabled), this will panic. Consider guarding the SkipTrivia call similarly to emitCommentsBeforeToken (check p.currentSourceFile != nil and skip only for non-synthesized positions), and fall back to emitting pos unchanged when no source file text is available.

Suggested change

	pos = scanner.SkipTrivia(p.currentSourceFile.Text(), pos)
	if p.currentSourceFile != nil && !ast.PositionIsSynthesized(pos) {
	pos = scanner.SkipTrivia(p.currentSourceFile.Text(), pos)
	}