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go/types: in string(x) conversions, x must be of integer type

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Port of https://go-review.googlesource.com/11365

Fixes #11357.

Change-Id: Icd20fa038696a8853d1d14477e1c1132938b3e2e
Reviewed-on: https://go-review.googlesource.com/11368
Reviewed-by: Alan Donovan <adonovan@google.com>
This commit is contained in:
Robert Griesemer 2015-06-23 14:01:45 -07:00
parent 4ba1f25888
commit eb30fda83e
2 changed files with 6 additions and 1 deletions
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2
src/go/types/conversions.go
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@ -20,7 +20,7 @@ func (check *Checker) conversion(x *operand, T Type) {
switch t := T.Underlying().(*Basic); {
case representableConst(x.val, check.conf, t.kind, &x.val):
ok = true
case x.isInteger() && isString(t):
case isInteger(x.typ) && isString(t):
codepoint := int64(-1)
if i, ok := exact.Int64Val(x.val); ok {
codepoint = i

5
src/go/types/testdata/conversions.src vendored
View File

@ -32,6 +32,11 @@ func string_conversions() {
const _ = string(true /* ERROR "cannot convert" */ )
const _ = string(1.2 /* ERROR "cannot convert" */ )
const _ = string(nil /* ERROR "cannot convert" */ )
// issues 11357, 11353: argument must be of integer type
_ = string(0.0 /* ERROR "cannot convert" */ )
_ = string(0i /* ERROR "cannot convert" */ )
_ = string(1 /* ERROR "cannot convert" */ + 2i)
}
func interface_conversions() {