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e710a1fb2e
Previously, we used a single "untyped number" type for all untyped
numeric constants. This led to vague error messages like "string(1.0)"
reporting that "1 (type untyped number)" can't be converted to string,
even though "string(1)" is valid.
This CL makes cmd/compile more like go/types by utilizing
types.Ideal{int,rune,float,complex} instead of types.Types[TIDEAL],
and keeping n.Type in sync with n.Val().Ctype() during constant
folding.
Thanks to K Heller for looking into this issue, and for the included
test case.
Fixes #21979.
Change-Id: Ibfea88c05704bc3c0a502a455d018a375589754d
Reviewed-on: https://go-review.googlesource.com/c/go/+/194019
Reviewed-by: Robert Griesemer <gri@golang.org>
16 lines
462 B
Go
16 lines
462 B
Go
// errorcheck
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// Copyright 2014 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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// Internal compiler crash used to stop errors during second copy.
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package main
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func main() {
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_ = copy(nil, []int{}) // ERROR "use of untyped nil"
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_ = copy([]int{}, nil) // ERROR "use of untyped nil"
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_ = 1 + true // ERROR "mismatched types untyped int and untyped bool"
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}
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