Instantiation expression can be followed by line break or binary operator #49353
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typescript-bot
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For Uncommitted Bug
src/compiler/parser.ts
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| case SyntaxKind.InterfaceKeyword: | ||
| case SyntaxKind.LetKeyword: |
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You need to cover more than just these cases and have tests for them - for example
class C {
static specialFoo = f<string>
static bar = 123;
}
class D {
public specialFoo = f<string>
public bar = 123;
}
class E {
private specialFoo = f<string>
private bar = 123;
}
class F {
protected specialFoo = f<string>
protected bar = 123;
}
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CC @nicolo-ribaudo @evanw @kdy1 the idea of this PR and issue is that an instantiation expression cannot be followed by a newline and some set of strict-mode reserved words. |
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Other than strict-mode keywords, you might also want to special-case |
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We just discussed the nuances of |
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I hate any new "valid JavaScript has different semantics when parsed as TypeScript" rule, but it's so uncommon to see Maybe OT Since you are fine-tuning how instantiation expressions are parsed: it's weird that |
😬 Opened #49362 |
typescript-bot
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For Milestone Bug
ahejlsberg
changed the title
let or interface on new line
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@typescript-bot test top100 |
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Ran out of memory trying to compile angular ☠️ @typescript-bot test top100 |
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Let's try again: |
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Heya @sandersn, I've started to run the diff-based user code test suite on this PR at 816553a. You can monitor the build here. Update: The results are in! |
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@typescript-bot test this |
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Heya @ahejlsberg, I've started to run the parallelized Definitely Typed test suite on this PR at 816553a. You can monitor the build here. |
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Heya @ahejlsberg, I've started to run the abridged perf test suite on this PR at 816553a. You can monitor the build here. Update: The results are in! |
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Heya @ahejlsberg, I've started to run the diff-based user code test suite on this PR at 816553a. You can monitor the build here. Update: The results are in! |
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Heya @ahejlsberg, I've started to run the extended test suite on this PR at 816553a. You can monitor the build here. |
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@ahejlsberg Here they are:Comparison Report - main..49353
System
Hosts
Scenarios
Developer Information: |
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Heya @ahejlsberg, I've run the RWC suite on this PR - assuming you're on the TS core team, you can view the resulting diff here. |
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@ahejlsberg |
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All test runs are clean and performance is unaffected. |
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Does this PR also change the behavior of new expressions? e.g. new A<B>
Cdoes ASI affect this code? (or as an alternative, it there a playground where I can test it myself? 😅) EDIT: Yes, ASI inserts a semicolon there: https://www.typescriptlang.org/play?ts=4.8.0-dev.20220611#code%2FHYUw7gBAggPAQgPgFAGEg= |
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Hi, will this PR be released in the near future? |
This PR adjusts our parsing of instantiation expressions. When a potential type argument list is followed by
(token,<or>that isn't the start of an expression,we consider that construct to be a type argument list. Otherwise we consider the construct to be a
<relational expression followed by a '>` relational expression.Fixes #49348.
Fixes #49362.