- fixed a bug w/ exports (wrong package info)

- keep track of type alias (type T1 T0) so we can print the proper type name

R=r
OCL=13688
CL=13688

usr/gri/gosrc/base.go

@@ -6,9 +6,14 @@
 
 package base
 
+type Foo int
+
+type Bar *float;
+
 type Node struct {
   left, right *Node;
-  val bool
+  val bool;
+  f Foo
 }
 
-export Node
+export Foo, Bar, Node

usr/gri/gosrc/decls.go

@@ -6,7 +6,7 @@
 
 package decls
 
-import "base"
+//import "base"
 import base "base"
 import base2 "base"
 

usr/gri/gosrc/export.go

@@ -23,7 +23,7 @@ type Exporter struct {
 
 func (E *Exporter) WriteType(typ *Globals.Type);
 func (E *Exporter) WriteObject(obj *Globals.Object);
-func (E *Exporter) WritePackage(pkg *Globals.Package);
+func (E *Exporter) WritePackage(pno int);
 
 
 func (E *Exporter) WriteByte(x byte) {
@@ -132,7 +132,7 @@ func (E *Exporter) WriteObject(obj *Globals.Object) {
 		E.WriteObjectTag(obj.kind);
 		E.WriteString(obj.ident);
 		E.WriteType(obj.typ);
-		E.WritePackage(E.comp.pkgs[obj.pnolev]);
+		E.WritePackage(obj.pnolev);
 
 		switch obj.kind {
 		case Object.CONST:
@@ -173,12 +173,15 @@ func (E *Exporter) WriteType(typ *Globals.Type) {
 			panic "typ.obj.type() != typ";  // primary type
 		}
 		E.WriteString(typ.obj.ident);
-		E.WritePackage(E.comp.pkgs[typ.obj.pnolev]);
+		E.WritePackage(typ.obj.pnolev);
 	} else {
 		E.WriteString("");
 	}
 
 	switch typ.form {
+	case Type.ALIAS:
+		E.WriteType(typ.elt);
+
 	case Type.ARRAY:
 		E.WriteInt(typ.len_);
 		E.WriteType(typ.elt);
@@ -207,7 +210,11 @@ func (E *Exporter) WriteType(typ *Globals.Type) {
 }
 
 
-func (E *Exporter) WritePackage(pkg *Globals.Package) {
+func (E *Exporter) WritePackage(pno int) {
+	if pno < 0 {
+		pno = 0;
+	}
+	pkg := E.comp.pkgs[pno];
 	if pkg.ref >= 0 {
 		E.WritePackageTag(pkg.ref);  // package already exported
 		return;
@@ -251,7 +258,7 @@ func (E *Exporter) Export(comp* Globals.Compilation, file_name string) {
 	E.type_ref = Universe.types.len_;
 	
 	pkg := comp.pkgs[0];
-	E.WritePackage(pkg);
+	E.WritePackage(0);
 	E.WriteScope(pkg.scope);
 	
 	if E.debug {

usr/gri/gosrc/import.go

@@ -200,7 +200,9 @@ func (I *Importer) ReadType() *Globals.Type {
 	I.type_ref++;
 
 	switch (typ.form) {
-	default: fallthrough;
+	case Type.ALIAS:
+		typ.elt = I.ReadType();
+
 	case Type.ARRAY:
 		typ.len_ = I.ReadInt();
 		typ.elt = I.ReadType();

usr/gri/gosrc/parser.go

@@ -1633,9 +1633,21 @@ func (P *Parser) ParseTypeSpec(exported bool) {
 		P.Declare(obj);
 	}
 	
-	typ := P.TryType();  // nil if we have an explicit forward declaration
+	// If the next token is an identifier and we have a legal program,
+	// it must be a typename. In that case this declaration introduces
+	// an alias type.
+	make_alias := P.tok == Scanner.IDENT;
+	
+	// If we have an explicit forward declaration, TryType will not
+	// find a type and return nil.
+	typ := P.TryType();
 
 	if typ != nil {
+		if make_alias {
+			alias := Globals.NewType(Type.ALIAS);
+			alias.elt = typ;
+			typ = alias;
+		}
 		obj.typ = typ;
 		if typ.obj == nil {
 			typ.obj = obj;  // primary type object

usr/gri/gosrc/printer.go

@@ -199,6 +199,9 @@ func (P *Printer) PrintTypeStruct(typ *Globals.Type) {
 		}
 		P.PrintType(typ);
 
+	case Type.ALIAS:
+		P.PrintType(typ.elt);
+
 	case Type.ARRAY:
 		print "[]";
 		P.PrintType(typ.elt);

usr/gri/gosrc/type.go

@@ -8,7 +8,7 @@ export
 	UNDEF, BAD, NIL,
 	BOOL, UINT, INT, FLOAT, STRING,
 	ANY,
-	ARRAY, STRUCT, INTERFACE, MAP, CHANNEL, FUNCTION, POINTER, REFERENCE
+	ALIAS, ARRAY, STRUCT, INTERFACE, MAP, CHANNEL, FUNCTION, POINTER, REFERENCE
 
 const /* form */ (
 	// internal types
@@ -18,7 +18,7 @@ const /* form */ (
 	// 'any' type
 	ANY;
 	// composite types
-	ARRAY; STRUCT; INTERFACE; MAP; CHANNEL; FUNCTION; POINTER; REFERENCE;
+	ALIAS; ARRAY; STRUCT; INTERFACE; MAP; CHANNEL; FUNCTION; POINTER; REFERENCE;
 )
 
 
@@ -48,6 +48,7 @@ func FormStr(form int) string {
 	case FLOAT: return "FLOAT";
 	case STRING: return "STRING";
 	case ANY: return "ANY";
+	case ALIAS: return "ALIAS";
 	case ARRAY: return "ARRAY";
 	case STRUCT: return "STRUCT";
 	case INTERFACE: return "INTERFACE";

usr/gri/gosrc/universe.go

@@ -79,15 +79,17 @@ func DeclObj(kind int, ident string, typ *Globals.Type) *Globals.Object {
 }
 
 
-func DeclAlias(ident string, typ *Globals.Type) *Globals.Type {
-	return DeclObj(Object.TYPE, ident, typ).typ;
-}
-
-
 func DeclType(form int, ident string, size int) *Globals.Type {
   typ := Globals.NewType(form);
   typ.size = size;
-  return DeclAlias(ident, typ);
+  return DeclObj(Object.TYPE, ident, typ).typ;
+}
+
+
+func DeclAlias(ident string, typ *Globals.Type) *Globals.Type {
+	alias := Globals.NewType(Type.ALIAS);
+	alias.elt = typ;
+	return DeclObj(Object.TYPE, ident, alias).typ;
 }
 
 

usr/gri/gosrc/verifier.go

@@ -50,6 +50,8 @@ func VerifyType(typ *Globals.Type) {
 		break;
 	case Type.ANY:
 		break;
+	case Type.ALIAS:
+		break;
 	case Type.ARRAY:
 		break;
 	case Type.STRUCT: