statics-fastpath-flags.js

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// |jit-test| --fast-warmup

// Same source with different flags shares the statics' input and source, so

// the lazily replayed match must use the flags of the latest execution. Reading

// the statics clears their lazy source, so the later cases run two executions

// before reading to cover the case where only the flags changed.

const s = "Ab a Ab a";

const insensitive = /a/gi;

const sensitive = /a/g;

const sticky = /a/y;

const unanchored = /a/;

for (let i = 0; i < 500; i++) {

  insensitive.lastIndex = 0;

  assertEq(insensitive.exec(s).index, 0);

  assertEq(RegExp.lastMatch, "A");

  assertEq(RegExp.leftContext, "");

  sensitive.lastIndex = 0;

  assertEq(sensitive.exec(s).index, 3);

  assertEq(RegExp.lastMatch, "a");

  assertEq(RegExp.leftContext, "Ab ");

  sticky.lastIndex = 8;

  assertEq(sticky.exec(s).index, 8);

  assertEq(RegExp.leftContext, "Ab a Ab ");

  assertEq(unanchored.exec(s).index, 3);

  assertEq(RegExp.leftContext, "Ab ");

  assertEq(s.replace(insensitive, "-"), "-b - -b -");

  assertEq(RegExp.leftContext, "Ab a Ab ");

  assertEq(s.replace(/A/g, "-"), "-b a -b a");

  assertEq(RegExp.leftContext, "Ab a ");

  insensitive.lastIndex = 0;

  insensitive.exec(s);

  sensitive.lastIndex = 0;

  sensitive.exec(s);

  assertEq(RegExp.lastMatch, "a");

  assertEq(RegExp.leftContext, "Ab ");

  sensitive.lastIndex = 0;

  sensitive.exec(s);

  insensitive.lastIndex = 0;

  insensitive.exec(s);

  assertEq(RegExp.lastMatch, "A");

  assertEq(RegExp.leftContext, "");

  s.replace(/a/gi, "-");

  s.replace(/a/g, "-");

  assertEq(RegExp.leftContext, "Ab a Ab ");

  assertEq(RegExp.lastMatch, "a");

  unanchored.exec(s);

  sticky.lastIndex = 0;

  sticky.test(s);

  /a/i.exec(s);

  assertEq(RegExp.lastMatch, "A");

  assertEq(RegExp.leftContext, "");