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Simplify or optimize regexes with polynomial time worst cases (#44197)

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* Simplify or optimize regexes with polynomial time worst cases

* PR feedback & cleanup

Co-authored-by: David Michon <dmichon-msft@users.noreply.github.com>

* Use builtin scanner function for checking whitespace in fallback method (its faster)

Co-authored-by: David Michon <dmichon-msft@users.noreply.github.com>
This commit is contained in:
Wesley Wigham
2021-05-24 15:28:52 -07:00
committed by GitHub
parent 2203228b62
commit fcabb5c0cc
11 changed files with 158 additions and 85 deletions
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src/compiler/program.ts
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@@ -406,7 +406,7 @@ namespace ts {
const lineStart = getPositionOfLineAndCharacter(file, i, 0);
const lineEnd = i < lastLineInFile ? getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
let lineContent = file.text.slice(lineStart, lineEnd);
lineContent = lineContent.replace(/\s+$/g, ""); // trim from end
lineContent = trimStringEnd(lineContent); // trim from end
lineContent = lineContent.replace(/\t/g, " "); // convert tabs to single spaces
// Output the gutter and the actual contents of the line.