First cut at a Go pretty printer:

- code scavenged from Go-in-Go front-end (will merge back)
- using "symbol-table" free parsing to build AST
- no printing yet

R=r
OCL=15504
CL=15504

1 files changed, 48 insertions, 0 deletions

diff --git a/usr/gri/pretty/pretty.go b/usr/gri/pretty/pretty.go
new file mode 100644
index 000000000..48f470f18
--- /dev/null
+++ b/usr/gri/pretty/pretty.go
@@ -0,0 +1,48 @@
+// 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
+
+import Flag "flag"
+import Platform "platform"
+import Scanner "scanner"
+import AST "ast"  // should not be needed
+import Parser "parser"
+import Printer "printer"
+
+
+var (
+    verbose = Flag.Bool("v", false, nil, "verbose mode");
+    sixg = Flag.Bool("6g", false, nil, "6g compatibility mode");
+    tokenchan = Flag.Bool("token_chan", false, nil, "use token channel for scanner-parser connection");
+)
+
+
+func main() {
+	Flag.Parse();
+	
+	// process files
+	for i := 0; i < Flag.NArg(); i++ {
+	    src_file := Flag.Arg(i);
+
+	    src, ok := Platform.ReadSourceFile(src_file);
+	    if !ok {
+                print("cannot open ", src_file, "\n");
+                return;
+            }
+
+	    scanner := new(Scanner.Scanner);
+            scanner.Open(src_file, src);
+
+	    var tstream *<-chan *Scanner.Token;
+            if tokenchan.BVal() {
+                tstream = scanner.TokenStream();
+	    }
+
+	    parser := new(Parser.Parser);
+	    parser.Open(verbose.BVal(), scanner, tstream);
+
+	    parser.ParseProgram();
+	}
+}