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Expressions involving nil, even if they can be evaluated at compile time, do not count as Go constants and cannot be used in const initializers. Fixes #4673. Fixes #4680. R=ken2 CC=golang-dev https://golang.org/cl/7278043
34 lines
681 B
Go
34 lines
681 B
Go
// errorcheck
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test that len non-constants are not constants, http://golang.org/issue/3244.
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package p
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var b struct {
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a[10]int
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}
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var m map[string][20]int
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var s [][30]int
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func f() *[40]int
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var c chan *[50]int
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const (
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n1 = len(b.a)
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n2 = len(m[""])
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n3 = len(s[10])
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n4 = len(f()) // ERROR "is not a constant|is not constant"
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n5 = len(<-c) // ERROR "is not a constant|is not constant"
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n6 = cap(f()) // ERROR "is not a constant|is not constant"
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n7 = cap(<-c) // ERROR "is not a constant|is not constant"
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)
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