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treat ... as agreed

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only unencapsulated if passing one ddd
argument to one ddd parameter.

R=r
OCL=18376
CL=18376
This commit is contained in:
Ken Thompson 2008-11-03 15:32:49 -08:00
parent 63f38d62ac
commit 90e5574f1c
1 changed files with 27 additions and 10 deletions
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35
src/cmd/gc/walk.c
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@ -1640,7 +1640,7 @@ sigtype(Type *st)
* with a pointer to the structure * with a pointer to the structure
*/ */
Node* Node*
mkdotargs(Node *r, Iter *saver, Node *nn, Type *l, int fp) mkdotargs(Node *r, Node *rr, Iter *saver, Node *nn, Type *l, int fp)
{ {
Type *t, *st, *ft; Type *t, *st, *ft;
Node *a, *n, *var; Node *a, *n, *var;
@ -1664,6 +1664,10 @@ mkdotargs(Node *r, Iter *saver, Node *nn, Type *l, int fp)
a = nod(OAS, N, r); a = nod(OAS, N, r);
n = list(n, a); n = list(n, a);
if(rr != N) {
r = rr;
rr = N;
} else
r = listnext(saver); r = listnext(saver);
} }
@ -1705,8 +1709,8 @@ mkdotargs(Node *r, Iter *saver, Node *nn, Type *l, int fp)
Node* Node*
ascompatte(int op, Type **nl, Node **nr, int fp) ascompatte(int op, Type **nl, Node **nr, int fp)
{ {
Type *l; Type *l, *ll;
Node *r, *nn, *a; Node *r, *rr, *nn, *a;
Iter savel, saver; Iter savel, saver;
/* /*
@ -1721,15 +1725,28 @@ ascompatte(int op, Type **nl, Node **nr, int fp)
loop: loop:
if(l != T && isddd(l->type)) { if(l != T && isddd(l->type)) {
if(r != N && isddd(r->type)) { // the ddd parameter must be last
goto more; ll = structnext(&savel);
if(ll != T)
yyerror("... must be last argument");
// special case --
// only if we are assigning a single ddd
// argument to a ddd parameter then it is
// passed thru unencapsulated
rr = listnext(&saver);
if(r != N && rr == N && isddd(r->type)) {
a = nod(OAS, nodarg(l, fp), r);
a = convas(a);
nn = list(a, nn);
return rev(nn);
} }
nn = mkdotargs(r, &saver, nn, l, fp); // normal case -- make a structure of all
// remaining arguments and pass a pointer to
// it to the ddd parameter (empty interface)
nn = mkdotargs(r, rr, &saver, nn, l, fp);
l = structnext(&savel);
if(l != T)
yyerror("... must be last argument");
return rev(nn); return rev(nn);
} }