Function referenceStringEnd

optimization_equiv_test.go:26–50

============================================================================= Focused equivalence tests for the stringEnd fast path (PR #285-style "fast path for the provably-safe common case" pattern). These tests pin the contract that stringEnd's new SIMD fast path returns EXACTLY the same (endIn

(data []byte)

// referenceStringEnd is the original byte-at-a-time implementation, kept here
// as an oracle. Do NOT modify — it is the semantic reference.
func referenceStringEnd(data []byte) (int, bool) {
	escaped := false
	for i, c := range data {
		if c == '"' {
			if !escaped {
				return i + 1, false
			} else {
				j := i - 1
				for {
					if j < 0 || data[j] != '\\' {
						return i + 1, true
					}
					j--
					if j < 0 || data[j] != '\\' {
						break
					}
					j--
				}
			}
		} else if c == '\\' {
			escaped = true
		}
	}
	return -1, escaped
}

// Verifies: SYS-REQ-045
func TestStringEnd_FastPathEquivalence_Cases(t *testing.T) {