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https://github.com/golang/go
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23 lines
566 B
Go
23 lines
566 B
Go
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// +build ignore
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package C1
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import "strings"
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func example() {
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x := "foo"
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println(x[:len(x)])
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// Match, but the transformation is not sound w.r.t. possible side effects.
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println(strings.Repeat("*", 3)[:len(strings.Repeat("*", 3))])
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// No match, since second use of wildcard doesn't match first.
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println(strings.Repeat("*", 3)[:len(strings.Repeat("*", 2))])
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// Recursive match demonstrating bottom-up rewrite:
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// only after the inner replacement occurs does the outer syntax match.
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println((x[:len(x)])[:len(x[:len(x)])])
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// -> (x[:len(x)])
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// -> x
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}
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