Function matchLen

cmd/go-post/fix.go:537–543

matchLen returns the length of the longest prefix shared by x and y.

(x, y string)

// matchLen returns the length of the longest prefix shared by x and y.
func matchLen(x, y string) int {
	i := 0
	for i < len(x) && i < len(y) && x[i] == y[i] {
		i++
	}
	return i
}

// addImport adds the import path to the file f, if absent.
func addImport(f *ast.File, ipath string) (added bool) {