disallow parens around type in struct literal syntax,

per discussion with gri.

R=ken
OCL=35108
CL=35108

src/cmd/gc/go.y

@@ -70,7 +70,7 @@
 %type	<list>	interfacedcl_list vardcl vardcl_list structdcl structdcl_list
 %type	<list>	common_dcl constdcl constdcl1 constdcl_list typedcl_list
 
-%type	<node>	convtype dotdotdot
+%type	<node>	convtype dotdotdot littype
 %type	<node>	indcl interfacetype structtype ptrtype
 %type	<node>	chantype non_chan_type othertype non_fn_type fntype
 
@@ -862,7 +862,7 @@ pexpr:
 		if($2 == LBODY)
 			loophack = 1;
 	}
-|	pexpr '{' braced_keyval_list '}'
+|	littype '{' braced_keyval_list '}'
 	{
 		// composite expression
 		$$ = nod(OCOMPLIT, N, $1);
@@ -870,6 +870,20 @@ pexpr:
 	}
 |	fnliteral
 
+littype:
+	name
+|	pexpr '.' sym
+	{
+		if($1->op == OPACK) {
+			Sym *s;
+			s = restrictlookup($3->name, $1->sym->name);
+			$1->used = 1;
+			$$ = oldname(s);
+			break;
+		}
+		$$ = nod(OXDOT, $1, newname($3));
+	}
+
 expr_or_type:
 	expr
 |	non_expr_type	%prec PreferToRightParen
@@ -942,6 +956,7 @@ convtype:
 	}
 |	structtype
 
+
 /*
  * to avoid parsing conflicts, type is split into
  *	channel types

src/pkg/reflect/all_test.go

@@ -84,15 +84,15 @@ var valueTests = []pair {
 	pair { (bool)(false), "true" },
 	pair { (*int8)(nil), "*int8(0)" },
 	pair { (**int8)(nil), "**int8(0)" },
-	pair { ([5]int32){}, "[5]int32{0, 0, 0, 0, 0}" },
+	pair { [5]int32{}, "[5]int32{0, 0, 0, 0, 0}" },
 	pair { (**integer)(nil), "**reflect_test.integer(0)" },
 	pair { (map[string]int32)(nil), "map[string] int32{<can't iterate on maps>}" },
 	pair { (chan<-string)(nil), "chan<- string" },
-	pair { (struct {c chan *int32; d float32}){}, "struct { c chan *int32; d float32 }{chan *int32, 0}" },
+	pair { struct {c chan *int32; d float32}{}, "struct { c chan *int32; d float32 }{chan *int32, 0}" },
 	pair { (func(a int8, b int32))(nil), "func(int8, int32)(0)" },
-	pair { (struct {c func(chan *integer, *int8)}){}, "struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}" },
-	pair { (struct {a int8; b int32}){}, "struct { a int8; b int32 }{0, 0}" },
-	pair { (struct {a int8; b int8; c int32}){}, "struct { a int8; b int8; c int32 }{0, 0, 0}" },
+	pair { struct {c func(chan *integer, *int8)}{}, "struct { c func(chan *reflect_test.integer, *int8) }{func(chan *reflect_test.integer, *int8)(0)}" },
+	pair { struct {a int8; b int32}{}, "struct { a int8; b int32 }{0, 0}" },
+	pair { struct {a int8; b int8; c int32}{}, "struct { a int8; b int8; c int32 }{0, 0, 0}" },
 }
 
 func testType(t *testing.T, i int, typ Type, want string) {

test/fixedbugs/bug207.go

+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+var _ = []int{}
+var _ = ([]int){}	// ERROR "syntax"
+var _ = [...]int{}
+var _ = ([...]int){}	// ERROR "syntax"

test/parentype.go

@@ -10,8 +10,6 @@ func f(interface{})
 func g() {}
 func main() {
 	f(map[string]string{"a":"b","c":"d"});
-	f((map[string]string){"a":"b","c":"d"});
-	f((map[string]func()){"a":g,"c":g});
 	f(make(chan(<-chan int)));
 	f(make(chan<-(chan int)));
 }