cmd/gc: qualified embedded fields with owner package.

R=rsc
CC=golang-dev
https://golang.org/cl/14188044

src/cmd/gc/dcl.c

@@ -1021,7 +1021,7 @@ tointerface(NodeList *l)
 }
 
 Node*
-embedded(Sym *s)
+embedded(Sym *s, Pkg *pkg)
 {
 	Node *n;
 	char *name;
@@ -1038,9 +1038,9 @@ embedded(Sym *s)
 
 	if(exportname(name))
 		n = newname(lookup(name));
-	else if(s->pkg == builtinpkg && importpkg != nil)
-		// The name of embedded builtins during imports belongs to importpkg.
-		n = newname(pkglookup(name, importpkg));
+	else if(s->pkg == builtinpkg)
+		// The name of embedded builtins belongs to pkg.
+		n = newname(pkglookup(name, pkg));
 	else
 		n = newname(pkglookup(name, s->pkg));
 	n = nod(ODCLFIELD, n, oldname(s));

src/cmd/gc/fmt.c

@@ -754,6 +754,9 @@ typefmt(Fmt *fp, Type *t)
 				//if(t->funarg)
 				//	fmtstrcpy(fp, "_ ");
 				//else
+				if(t->embedded && s->pkg != nil && s->pkg->path->len > 0)
+					fmtprint(fp, "@\"%Z\".? ", s->pkg->path);
+				else
 					fmtstrcpy(fp, "? ");
 			}
 		}

src/cmd/gc/go.h

@@ -1080,7 +1080,7 @@ NodeList*	constiter(NodeList *vl, Node *t, NodeList *cl);
 Node*	dclname(Sym *s);
 void	declare(Node *n, int ctxt);
 void	dumpdcl(char *st);
-Node*	embedded(Sym *s);
+Node*	embedded(Sym *s, Pkg *pkg);
 Node*	fakethis(void);
 void	funcbody(Node *n);
 void	funccompile(Node *n, int isclosure);

src/cmd/gc/go.y

@@ -1126,6 +1126,19 @@ hidden_importsym:
 		}
 		$$ = pkglookup($4->name, p);
 	}
+|	'@' LLITERAL '.' '?'
+	{
+		Pkg *p;
+
+		if($2.u.sval->len == 0)
+			p = importpkg;
+		else {
+			if(isbadimport($2.u.sval))
+				errorexit();
+			p = mkpkg($2.u.sval);
+		}
+		$$ = pkglookup("?", p);
+	}
 
 name:
 	sym	%prec NotParen
@@ -1536,7 +1549,7 @@ structdcl:
 			n = $2;
 			if(n->op == OIND)
 				n = n->left;
-			n = embedded(n->sym);
+			n = embedded(n->sym, importpkg);
 			n->right = $2;
 			n->val = $3;
 			$$ = list1(n);
@@ -1607,7 +1620,7 @@ packname:
 embed:
 	packname
 	{
-		$$ = embedded($1);
+		$$ = embedded($1, localpkg);
 	}
 
 interfacedcl:
@@ -2061,15 +2074,19 @@ hidden_structdcl:
 	sym hidden_type oliteral
 	{
 		Sym *s;
+		Pkg *p;
 
-		if($1 != S) {
+		if($1 != S && strcmp($1->name, "?") != 0) {
 			$$ = nod(ODCLFIELD, newname($1), typenod($2));
 			$$->val = $3;
 		} else {
 			s = $2->sym;
 			if(s == S && isptr[$2->etype])
 				s = $2->type->sym;
-			$$ = embedded(s);
+			p = importpkg;
+			if($1 != S)
+				p = $1->pkg;
+			$$ = embedded(s, p);
 			$$->right = typenod($2);
 			$$->val = $3;
 		}

src/cmd/gc/y.tab.h

-/* A Bison parser, made by GNU Bison 2.3.  */
+/* A Bison parser, made by GNU Bison 2.5.  */
 
-/* Skeleton interface for Bison's Yacc-like parsers in C
-
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006
-   Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
+/* Bison interface for Yacc-like parsers in C
+   
+      Copyright (C) 1984, 1989-1990, 2000-2011 Free Software Foundation, Inc.
+   
+   This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+   
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-
+   
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* As a special exception, you may create a larger work that contains
    part or all of the Bison parser skeleton and distribute that work
@@ -29,10 +26,11 @@
    special exception, which will cause the skeleton and the resulting
    Bison output files to be licensed under the GNU General Public
    License without this special exception.
-
+   
    This special exception was added by the Free Software Foundation in
    version 2.2 of Bison.  */
 
+
 /* Tokens.  */
 #ifndef YYTOKENTYPE
 # define YYTOKENTYPE
@@ -146,22 +144,28 @@
 
 #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
 typedef union YYSTYPE
-#line 28 "go.y"
 {
+
+/* Line 2068 of yacc.c  */
+#line 28 "go.y"
+
 	Node*		node;
 	NodeList*		list;
 	Type*		type;
 	Sym*		sym;
 	struct	Val	val;
 	int		i;
-}
-/* Line 1529 of yacc.c.  */
-#line 160 "y.tab.h"
-	YYSTYPE;
+
+
+
+/* Line 2068 of yacc.c  */
+#line 163 "y.tab.h"
+} YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
 # define yystype YYSTYPE /* obsolescent; will be withdrawn */
 # define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
 #endif
 
 extern YYSTYPE yylval;
 
+

src/cmd/gc/yerr.h

@@ -14,28 +14,28 @@ static struct {
 	// is converted by bisonerrors into the yystate and yychar caused
 	// by that token list.
 
-	221, ',',
+	222, ',',
 	"unexpected comma during import block",
 
 	32, ';',
 	"missing import path; require quoted string",
 
-	377, ';',
+	378, ';',
 	"missing { after if clause",
 
-	398, ';',
+	399, ';',
 	"missing { after switch clause",
 
-	237, ';',
+	238, ';',
 	"missing { after for clause",
 
-	475, LBODY,
+	476, LBODY,
 	"missing { after for clause",
 
 	22, '{',
 	"unexpected semicolon or newline before {",
 
-	144, ';',
+	145, ';',
 	"unexpected semicolon or newline in type declaration",
 
 	37, '}',
@@ -47,33 +47,33 @@ static struct {
 	37, ',',
 	"unexpected comma in channel type",
 
-	438, LELSE,
+	439, LELSE,
 	"unexpected semicolon or newline before else",
 
-	257, ',',
+	258, ',',
 	"name list not allowed in interface type",
 
-	237, LVAR,
+	238, LVAR,
 	"var declaration not allowed in for initializer",
 
 	65, '{',
 	"unexpected { at end of statement",
 
-	376, '{',
+	377, '{',
 	"unexpected { at end of statement",
 	
-	125, ';',
+	126, ';',
 	"argument to go/defer must be function call",
 	
-	425, ';',
+	426, ';',
 	"need trailing comma before newline in composite literal",
 	
-	436, ';',
+	437, ';',
 	"need trailing comma before newline in composite literal",
 	
-	112, LNAME,
+	113, LNAME,
 	"nested func not allowed",
 
-	644, ';',
+	645, ';',
 	"else must be followed by if or statement block"
 };

test/fixedbugs/issue6513.dir/a.go

+// Copyright 2013 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 a
+
+type T struct{ int }

test/fixedbugs/issue6513.dir/b.go

+// Copyright 2013 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 b
+
+import "./a"
+
+type U struct{ a.T }

test/fixedbugs/issue6513.dir/main.go

+// Copyright 2013 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
+
+import (
+	"./a"
+	"./b"
+)
+
+func main() {
+	var t a.T
+	var u b.U
+	_, _ = t, u
+}

test/fixedbugs/issue6513.go

+// compiledir
+
+// Copyright 2013 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.
+
+// Issue 6513: embedded builtins may get incorrect qualified
+// field name during import.
+
+package ignored