Function looksLikeJSON

json_fuzz_test.go:1480–1493

============================================================================= The fuzzer (testing.F, native go-fuzz) ============================================================================= looksLikeJSON reports whether data begins with a byte that could start a JSON value. This is a cheap pre-

(data []byte)

// or to regenerate from the grammar (to maintain structural coverage when
// the engine has mutated the data into non-JSON garbage).
func looksLikeJSON(data []byte) bool {
	for _, b := range data {
		switch b {
		case ' ', '\t', '\n', '\r':
			continue
		case '{', '[', '"', 't', 'f', 'n', '-',
			'0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
			return true
		default:
			return false
		}
	}
	return false
}

// FuzzJSONStructureAware is the structure-aware fuzzer. It combines:
//   - Grammar-based JSON generation (always emits valid structures).