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cmd/gc: reject complex calls with mismatched argument types.

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The specification says "the two arguments must be of the same
floating-point type."

R=rsc, gri
CC=golang-dev
https://golang.org/cl/7671045
This commit is contained in:
Rémy Oudompheng 2013-03-11 22:55:14 +01:00
parent e15c0ac693
commit 401e0fea3a
2 changed files with 28 additions and 2 deletions
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4
src/cmd/gc/typecheck.c
View file

@ -1182,9 +1182,9 @@ reswitch:
defaultlit2(&l, &r, 0);
n->left = l;
n->right = r;
if(l->type->etype != r->type->etype) {
if(!eqtype(l->type, r->type)) {
badcmplx:
yyerror("invalid operation: %N (complex of types %T, %T)", n, l->type, r->type);
yyerror("invalid operation: %N (mismatched types %T and %T)", n, l->type, r->type);
goto error;
}
switch(l->type->etype) {

26
test/cmplx.go
View file

@ -9,12 +9,23 @@
package main
type (
Float32 float32
Float64 float64
Complex64 complex64
Complex128 complex128
)
var (
f32 float32
f64 float64
F32 Float32
F64 Float64
c64 complex64
c128 complex128
C64 Complex64
C128 Complex128
)
func main() {
@ -25,4 +36,19 @@ func main() {
_ = complex128(0) // ok
_ = complex(f32, f64) // ERROR "complex"
_ = complex(f64, f32) // ERROR "complex"
_ = complex(f32, F32) // ERROR "complex"
_ = complex(F32, f32) // ERROR "complex"
_ = complex(f64, F64) // ERROR "complex"
_ = complex(F64, f64) // ERROR "complex"
c128 = complex(f32, f32) // ERROR "cannot use"
c64 = complex(f64, f64) // ERROR "cannot use"
c64 = complex(1.0, 2.0) // ok, constant is untyped
c128 = complex(1.0, 2.0)
C64 = complex(1.0, 2.0)
C128 = complex(1.0, 2.0)
C64 = complex(f32, f32) // ERROR "cannot use"
C128 = complex(f64, f64) // ERROR "cannot use"
}