Fix cross-file merge of assignment decl valueDeclaration #26918
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Previously mergeSymbol in the checker always updated valueDeclaration if target.valueDeclaration was an assignment declaration. The binder only updates target.valueDeclaration if it is an assignment declaration and source.valueDeclaration is *not* an assignment declaration. Now the checker behaves the same way as the binder.
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Baseline diff in jsContainerMergeJsContainer on CI |
weswigham
approved these changes
Sep 14, 2018
Makes commonjs merge with globals when appropriate.
sandersn
commented
Sep 14, 2018
src/compiler/checker.ts
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| /** CommonJS is *almost* a module -- no merges -- except that assignment declarations need to merge with globals. */ | ||
| function mergeCommonJsSymbolTable(target: SymbolTable, source: SymbolTable) { | ||
| source.forEach((sourceSymbol, id) => { | ||
| if (target.has(id) && sourceSymbol.flags & SymbolFlags.Assignment) { |
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Talking with @weswigham, he pointed out that it would be better to store all the identifier-unbound declarations in a separate per-file commonJSGlobalAugmentations property that gets merged into globals instead of trying to filter here (there are plenty of symbols marked with Assignment that shouldn't necessarily merge with globals).
Instead of trying to filter these augmentations out of the normal symbol table of commonjs modules.
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All right, the new table is in. I dropped the "common" part since all JS files create global augmentations, and they all need to be merged, regardless of whether they are in a commonJS module. |
weswigham
approved these changes
Sep 15, 2018
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Previously mergeSymbol in the checker always updated valueDeclaration if target.valueDeclaration was an assignment declaration. The binder only updates target.valueDeclaration if it is an assignment declaration and source.valueDeclaration is not an assignment declaration.
Now the checker behaves the same way as the binder.
Fixes #26877