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Instead, let the lexer produce .eof itself. This will be needed for regex literal lexing, where the lexer may still want to produce an empty regex literal pattern when at the end of the file, before the .eof token.

Instead, let the lexer produce `.eof` itself. This
will be needed for regex literal lexing, where the
lexer may still want to produce an empty regex
literal pattern when at the end of the file, before
the `.eof` token.
@hamishknight hamishknight requested a review from ahoppen as a code owner March 28, 2023 12:04
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@swift-ci please test

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@ahoppen FWIW it seems this is a minor performance win too, parsing MovieSwiftUI:

  • time: ~16ms -> ~15ms
  • instructions: ~128,670,000 -> ~128,400,000

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LGTM

@hamishknight hamishknight merged commit 96e6850 into swiftlang:main Mar 28, 2023
@hamishknight hamishknight deleted the eof branch March 28, 2023 18:07
ahoppen pushed a commit to ahoppen/swift-syntax that referenced this pull request Mar 31, 2023
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2 participants