// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build compiler_bootstrap
// +build compiler_bootstrap

package strconv

// index returns the index of the first instance of c in s, or -1 if missing.
func index(s string, c byte) int {
	for i := 0; i < len(s); i++ {
		if s[i] == c {
			return i
		}
	}
	return -1
}