Typeof can refer to block-scoped values before declaration#15239
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sandersn merged 5 commits intoApr 18, 2017
mastermicrosoft/TypeScript:masterfrom
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Merged
Typeof can refer to block-scoped values before declaration#15239sandersn merged 5 commits intomastermicrosoft/TypeScript:masterfrom typeof-can-refer-class-before-declarationmicrosoft/TypeScript:typeof-can-refer-class-before-declarationCopy head branch name to clipboard
sandersn merged 5 commits into
mastermicrosoft/TypeScript:masterfrom
typeof-can-refer-class-before-declarationmicrosoft/TypeScript:typeof-can-refer-class-before-declarationCopy head branch name to clipboard
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mhegazy
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Apr 17, 2017
mhegazy
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LGTM.
Can you run the perf tests to make sure the new polymorphic function does not impact performance adversely.
alfaproject
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Apr 18, 2017
| * At that point findAncestor returns undefined. | ||
| */ | ||
| export function findAncestor<T>(node: Node, callback: (element: Node) => T | undefined, done?: (element: Node) => boolean): Node { | ||
| if (node) { |
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You don't need this condition, because it's being checked in the while loop again
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With the PR as it stands now, total time of Monaco was 0.01 seconds faster and TFS was 0.37 seconds faster. Neither of those are significant, if I'm reading the output correctly. I'm going to update the PR suggestions from @alfaproject and @Andy-MS and then re-run the perf test. I'll also try to get Angular correctly added to the perf test. |
Previously there was a 'found' callback and a 'quit' callback.
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Perf tests are about the same with the changes suggested by @Andy-MS. There's some variance but the average is right around 0. |
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Fixes #15102 by allowing references to block-scoped values before declaration inside of a type query.
Also adds
findAncestor, which iterates up a parent pointer chain. I updated the parent pointer walks in checker to usefindAncestor.