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[dev.typeparams] cmd/compile/internal/types2: set compiler error message for undeclared variable

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Change-Id: Ie2950cdc5406915935f114bfd97ef03d965f9069
Reviewed-on: https://go-review.googlesource.com/c/go/+/274616
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
This commit is contained in:
Robert Griesemer 2020-12-01 16:07:00 -08:00
parent bdc4ffe9a8
commit 036245862a
2 changed files with 7 additions and 3 deletions
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6
src/cmd/compile/internal/types2/typexpr.go
View File

@ -32,7 +32,11 @@ func (check *Checker) ident(x *operand, e *syntax.Name, def *Named, wantType boo
if e.Value == "_" {
check.errorf(e, "cannot use _ as value or type")
} else {
check.errorf(e, "undeclared name: %s", e.Value)
if check.conf.CompilerErrorMessages {
check.errorf(e, "undefined: %s", e.Value)
} else {
check.errorf(e, "undeclared name: %s", e.Value)
}
}
return
}

4
test/typeparam/tparam1.go
View File

@ -10,8 +10,8 @@ package tparam1
// The predeclared identifier "any" is only visible as a constraint
// in a type parameter list.
var _ any // ERROR "undeclared"
func _(_ any) // ERROR "undeclared"
var _ any // ERROR "undefined"
func _(_ any) // ERROR "undefined"
type _[_ any /* ok here */ ] struct{}
const N = 10