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gc: complex(0)

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Fixes #1232.

R=ken2
CC=golang-dev
https://golang.org/cl/3621041
This commit is contained in:
Russ Cox 2010-12-13 15:34:45 -05:00
parent 88cf5564fc
commit 9e26c4bd1a
3 changed files with 6 additions and 5 deletions
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8
src/cmd/gc/const.c
View File

@ -202,8 +202,6 @@ convlit1(Node **np, Type *t, int explicit)
goto bad;
case CTFLT:
case CTINT:
if(explicit)
goto bad;
n->val = tocplx(n->val);
break;
case CTCPLX:
@ -300,7 +298,7 @@ toflt(Val v)
f = mal(sizeof(*f));
mpmovefltflt(f, &v.u.cval->real);
if(mpcmpfltc(&v.u.cval->imag, 0) != 0)
yyerror("constant %#F truncated to real", v.u.fval);
yyerror("constant %#F%+#Fi truncated to real", &v.u.cval->real, &v.u.cval->imag);
v.ctype = CTFLT;
v.u.fval = f;
break;
@ -324,9 +322,9 @@ toint(Val v)
case CTCPLX:
i = mal(sizeof(*i));
if(mpmovefltfix(i, &v.u.cval->real) < 0)
yyerror("constant %#F truncated to integer", v.u.fval);
yyerror("constant %#F%+#Fi truncated to integer", &v.u.cval->real, &v.u.cval->imag);
if(mpcmpfltc(&v.u.cval->imag, 0) != 0)
yyerror("constant %#F truncated to real", v.u.fval);
yyerror("constant %#F%+#Fi truncated to real", &v.u.cval->real, &v.u.cval->imag);
v.ctype = CTINT;
v.u.xval = i;
break;

2
src/cmd/gc/mparith1.c
View File

@ -475,6 +475,8 @@ Fconv(Fmt *fp)
// for well in range, convert to double and use print's %g
if(-900 < fvp->exp && fvp->exp < 900) {
d = mpgetflt(fvp);
if(d >= 0 && (fp->flags & FmtSign))
fmtprint(fp, "+");
return fmtprint(fp, "%g", d);
}
// TODO(rsc): for well out of range, print

1
test/cmplx.go
View File

@ -22,6 +22,7 @@ func main() {
c64 = cmplx(f32, f32)
c128 = cmplx(f64, f64)
_ = complex(0) // ok
_ = cmplx(f, f32) // ERROR "cmplx"
_ = cmplx(f, f64) // ERROR "cmplx"
_ = cmplx(f32, f) // ERROR "cmplx"