- fixed a few tests and added 3 incorrectly succeeding tests

- updated go_lang.txt to be more uniform and match the implementation
- made makehtml work on Mac
- fixed a couple of bugs in go.atg

SVN=121520

doc/go_lang.txt

@@ -4,7 +4,7 @@ The Go Programming Language (DRAFT)
 Robert Griesemer, Rob Pike, Ken Thompson
 
 ----
-(May 14, 2008)
+(June 6, 2008)
 
 This document is a semi-informal specification/proposal for a new
 systems programming language.  The document is under active
@@ -1563,17 +1563,19 @@ If statements
 
 If statements have the traditional form except that the
 condition need not be parenthesized and the "then" statement
-must be in brace brackets.
+must be in brace brackets. The condition may be omitted in which
+case it is assumed to have the value "true".
 
-  IfStat = "if" [ SimpleStat ";" ] Expression Block [ "else" Statement ] .
+  IfStat = "if" [ [ SimpleStat ";" ] Expression ] Block [ "else" Statement ] .
 
   if x > 0 {
     return true;
   }
-  
-An if statement may include the declaration of a single temporary variable.
+
+An "if" statement may include the declaration of a single temporary variable.
 The scope of the declared variable extends to the end of the if statement, and
-the variable is initialized once before the statement is entered. 
+the variable is initialized once before the statement is entered. If a variable
+is declared, the condition cannot be omitted.
 
   if x := f(); x < y {
     return x;

test/func.go

@@ -36,12 +36,12 @@ func f6(a int) (r int) {
 	return 6;
 }
 
-func f7(a int) (int, float) {
+func f7(a int) (x int, y float) {
 	return 7, 7.0;
 }
 
 
-func f8(a int) (a int, b float) {
+func f8(a int) (x int, y float) {
 	return 8, 8.0;
 }
 

test/func1.go

+// errchk $G $F.go
+
+// 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
+
+func f1(a int) (int, float) {  // BUG multiple return values must have names
+	return 7, 7.0;
+}
+
+
+func f2(a int) (a int, b float) {  // BUG return value names must be different from parameter names
+	return 8, 8.0;
+}

test/golden.out

@@ -23,6 +23,9 @@ main_f4: doasm: notfound from=75 to=10 (24)    IDIVL   $2,AX
 main_f4: doasm: notfound from=75 to=10 (24)    IDIVL   $2,AX
 BUG: known to fail incorrectly
 
+=========== ./func1.go
+BUG: known to succeed incorrectly
+
 =========== ./hashmap.go
 hashmap.go:46: fatal error: optoas: no entry LSH-<uint32>UINT32
 BUG: known to fail incorrectly
@@ -32,6 +35,9 @@ hello, world
 
 =========== ./if.go
 
+=========== ./if1.go
+BUG: known to succeed incorrectly
+
 =========== ./int_lit.go
 int_lit.go:5: syntax error
 BUG: known to fail incorrectly
@@ -52,6 +58,9 @@ BUG: known to fail incorrectly
 
 =========== ./switch.go
 
+=========== ./switch1.go
+BUG: known to succeed incorrectly
+
 =========== ./test0.go
 test0.go:23: addtyp: renaming Point/<Point>{<x><int32>INT32;<y><int32>INT32;} to Point2/<Point2>FORW
 test0.go:48: illegal types for operand

test/if.go

@@ -50,7 +50,7 @@ func main() {
 	assertequal(count, 1, "if empty");
 
 	count = 0;
-	if one := 1; {
+	if one := 1; true {
 		count = count + one;	
 	}
 	assertequal(count, 1, "if empty one");

test/if1.go

+// $G $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
+
+func main() {
+	count := 0;
+	if one := 1; {  // BUG if there is a simple stat, the condition must be present
+		count = count + one;	
+	}
+}

test/switch.go

@@ -35,7 +35,7 @@ func main() {
 	case i5 > x: assert(false, ">");
 	}
 
-	switch x := 5; {  // BUG?: true should not be necessary but now made mandatory in go_lang.txt
+	switch x := 5; true {
 	case i5 < x: assert(false, "<");
 	case i5 == x: assert(true, "!");
 	case i5 > x: assert(false, ">");

test/switch1.go

+// $G $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
+
+func main() {
+  i := 0;
+	switch x := 5; {  // BUG if there is a simple stat, the condition must be present
+	case i < x:
+	case i == x:
+	case i > x:
+	}
+}