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https://github.com/golang/go
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00b773a4a9
Previously, we would recognize &(T{...}) expressions during type
checking, rewrite them into (*T){...}, and then do a lot of extra work
to make sure the user doesn't write (*T){...} themselves and
resynthesizing the OPTRLIT later on.
This CL simply handles &T{...} directly in the straight forward
manner, by changing OADDR directly to OPTRLIT when appropriate.
While here, match go/types's invalid composite literal type error
message.
Passes toolstash-check.
Change-Id: I902b14c7e2cd9fa93e6915dd58272d2352ba38f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/197120
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
66 lines
1.5 KiB
Go
66 lines
1.5 KiB
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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// Verify that illegal composite literals are detected.
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// Does not compile.
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package main
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var m map[int][3]int
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func f() [3]int
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func fp() *[3]int
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var mp map[int]*[3]int
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var (
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_ = [3]int{1, 2, 3}[:] // ERROR "slice of unaddressable value"
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_ = m[0][:] // ERROR "slice of unaddressable value"
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_ = f()[:] // ERROR "slice of unaddressable value"
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_ = 301[:] // ERROR "cannot slice"
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_ = 3.1[:] // ERROR "cannot slice"
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_ = true[:] // ERROR "cannot slice"
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// these are okay because they are slicing a pointer to an array
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_ = (&[3]int{1, 2, 3})[:]
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_ = mp[0][:]
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_ = fp()[:]
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)
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type T struct {
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i int
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f float64
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s string
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next *T
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}
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type TP *T
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type Ti int
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var (
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_ = &T{0, 0, "", nil} // ok
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_ = &T{i: 0, f: 0, s: "", next: {}} // ERROR "missing type in composite literal|omit types within composite literal"
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_ = &T{0, 0, "", {}} // ERROR "missing type in composite literal|omit types within composite literal"
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_ = TP{i: 0, f: 0, s: "", next: {}} // ERROR "invalid composite literal type TP"
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_ = &Ti{} // ERROR "invalid composite literal type Ti"
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)
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type M map[T]T
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var (
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_ = M{{i:1}: {i:2}}
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_ = M{T{i:1}: {i:2}}
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_ = M{{i:1}: T{i:2}}
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_ = M{T{i:1}: T{i:2}}
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)
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type S struct { s [1]*M1 }
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type M1 map[S]int
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var _ = M1{{s:[1]*M1{&M1{{}:1}}}:2}
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