Improve @template lookup and resilience #42851
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1. @template parsing may produce a template tag with a type parameter whose name is the missing identifier. These tags should be skipped in the checker because they receive an error in the parser. 2. The fix in #37819 was incorrect; there's no such thing as a type parameter declared on a variable declaration. Instead, there needs to be a type parameter declared on a jsdoc comment, because that's the scope for tags like `@return` and `@typedef`. There are 3 tests because either fix (1) and (2) fix the first test's failure, but both are required to fix the last two tests' failures.
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Author: Team
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andrewbranch
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Feb 18, 2021
src/compiler/utilities.ts
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| @@ -4408,7 +4408,7 @@ namespace ts { | |||
| } | |||
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| export function getJSDocTypeParameterDeclarations(node: DeclarationWithTypeParameters): readonly TypeParameterDeclaration[] { | |||
| return flatMap(getJSDocTags(node), tag => isNonTypeAliasTemplate(tag) ? tag.typeParameters : undefined); | |||
| return flatMap(getJSDocTags(node), tag => isNonTypeAliasTemplate(tag) ? tag.typeParameters.filter(p => !containsParseError(p)) : undefined); | |||
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I heard u like Haskell
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| return flatMap(getJSDocTags(node), tag => isNonTypeAliasTemplate(tag) ? tag.typeParameters.filter(p => !containsParseError(p)) : undefined); | |
| return flatMap(getJSDocTags(node), tag => isNonTypeAliasTemplate(tag) ? tag.typeParameters.filter(not(containsParseError)) : undefined); |
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Um....oops. This isn't needed since I found that the Pursuit fellows made a better fix in December.
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parameter declared on a jsdoc comment, because that's the scope for tags like
@returnand@typedef.There are 3 tests because either fix (1) and (2) fix the first test's failure, but both are required to fix the last two tests' failures.
Fixes #42812
Edit: The fix in (1) isn't as good as the one in #42017, so I'm going to take that and leave the test cases in place.