mirror of
https://github.com/golang/go
synced 2024-09-30 18:18:32 -06:00
bfcffc697d
See refactor/eg/eg.go for details. LGTM=crawshaw R=crawshaw, gri, kamil.kisiel, josharian CC=golang-codereviews https://golang.org/cl/81010043
23 lines
566 B
Go
23 lines
566 B
Go
// +build ignore
|
|
|
|
package C1
|
|
|
|
import "strings"
|
|
|
|
func example() {
|
|
x := "foo"
|
|
println(x[:len(x)])
|
|
|
|
// Match, but the transformation is not sound w.r.t. possible side effects.
|
|
println(strings.Repeat("*", 3)[:len(strings.Repeat("*", 3))])
|
|
|
|
// No match, since second use of wildcard doesn't match first.
|
|
println(strings.Repeat("*", 3)[:len(strings.Repeat("*", 2))])
|
|
|
|
// Recursive match demonstrating bottom-up rewrite:
|
|
// only after the inner replacement occurs does the outer syntax match.
|
|
println((x[:len(x)])[:len(x[:len(x)])])
|
|
// -> (x[:len(x)])
|
|
// -> x
|
|
}
|