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gc: disallow [...][...]int{{1,2,3}}

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Fixes #1600.

R=ken2
CC=golang-dev
https://golang.org/cl/4819045
This commit is contained in:
Russ Cox 2011-07-26 00:52:02 -04:00
parent e5437ab065
commit bf899befdb
3 changed files with 7 additions and 7 deletions
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1
src/cmd/gc/go.h
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@ -531,6 +531,7 @@ enum
Eindir = 1<<8, // indirecting through expression Eindir = 1<<8, // indirecting through expression
Eaddr = 1<<9, // taking address of expression Eaddr = 1<<9, // taking address of expression
Eproc = 1<<10, // inside a go statement Eproc = 1<<10, // inside a go statement
Ecomplit = 1<<11, // type in composite literal
}; };
#define BITS 5 #define BITS 5

11
src/cmd/gc/typecheck.c
View File

@ -239,6 +239,8 @@ reswitch:
t->bound = -1; // slice t->bound = -1; // slice
} else if(l->op == ODDD) { } else if(l->op == ODDD) {
t->bound = -100; // to be filled in t->bound = -100; // to be filled in
if(!(top&Ecomplit))
yyerror("use of [...] array outside of array literal");
} else { } else {
l = typecheck(&n->left, Erv); l = typecheck(&n->left, Erv);
switch(consttype(l)) { switch(consttype(l)) {
@ -1342,11 +1344,6 @@ ret:
case TNIL: case TNIL:
case TBLANK: case TBLANK:
break; break;
case TARRAY:
if(t->bound == -100) {
yyerror("use of [...] array outside of array literal");
t->bound = 1;
}
default: default:
checkwidth(t); checkwidth(t);
} }
@ -1971,7 +1968,7 @@ typecheckcomplit(Node **np)
} }
setlineno(n->right); setlineno(n->right);
l = typecheck(&n->right /* sic */, Etype); l = typecheck(&n->right /* sic */, Etype|Ecomplit);
if((t = l->type) == T) if((t = l->type) == T)
goto error; goto error;
nerr = nerrors; nerr = nerrors;
@ -2039,7 +2036,7 @@ typecheckcomplit(Node **np)
l->right->right = typenod(pushtype); l->right->right = typenod(pushtype);
typecheck(&l->right, Erv); typecheck(&l->right, Erv);
defaultlit(&l->right, t->type); defaultlit(&l->right, t->type);
l->right = assignconv(l->right, t->type, "array index"); l->right = assignconv(l->right, t->type, "array element");
} }
if(t->bound == -100) if(t->bound == -100)
t->bound = len; t->bound = len;

2
test/ddd1.go
View File

@ -44,4 +44,6 @@ func bad(args ...int) {
_ = unsafe.Pointer(&x...) // ERROR "[.][.][.]" _ = unsafe.Pointer(&x...) // ERROR "[.][.][.]"
_ = unsafe.Sizeof(x...) // ERROR "[.][.][.]" _ = unsafe.Sizeof(x...) // ERROR "[.][.][.]"
_ = [...]byte("foo") // ERROR "[.][.][.]" _ = [...]byte("foo") // ERROR "[.][.][.]"
_ = [...][...]int{{1,2,3},{4,5,6}} // ERROR "[.][.][.]"
} }