From 2d20a210e4dd27c83b43dc9f72d02ecfecd203fa Mon Sep 17 00:00:00 2001
From: Andrei Vieru <euvieru@gmail.com>
Date: Thu, 15 Apr 2010 09:50:37 -0700
Subject: "godoc -src pkg_name" excludes duplicates entries

$ godoc xml | grep Copy\(\)
func (c CharData) Copy() CharData
func (c Comment) Copy() Comment
func (d Directive) Copy() Directive
func (p ProcInst) Copy() ProcInst
func (e StartElement) Copy() StartElement
--------------------------------------------
$ godoc -src xml | grep Copy\(\)
func (c CharData) Copy() CharData
--------------------------------------------
$ godoc -src xml Copy
func (c CharData) Copy() CharData { return CharData(makeCopy(c)) }
--------------------------------------------
The command "godoc -src pkg_name" should output the interface of the named package, but it excludes all duplicate entries. Also the command "godoc -src pkg_name method_name" will output the source code only for one method even if there are more of them with the same name in the same package. This patch set fixes this issue.

R=gri
CC=golang-dev
http://codereview.appspot.com/883051

Committer: Robert Griesemer <gri@golang.org>
---
 src/pkg/go/ast/filter.go | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

(limited to 'src/pkg/go')

diff --git a/src/pkg/go/ast/filter.go b/src/pkg/go/ast/filter.go
index d1d096ffd..009ffc21d 100644
--- a/src/pkg/go/ast/filter.go
+++ b/src/pkg/go/ast/filter.go
@@ -290,6 +290,17 @@ func FilterPackage(pkg *Package, f Filter) bool {
 // ----------------------------------------------------------------------------
 // Merging of package files
 
+// The MergeMode flags control the behavior of MergePackageFiles.
+type MergeMode uint
+
+const (
+	// If set, duplicate function declarations are excluded.
+	FilterFuncDuplicates MergeMode = 1 << iota
+	// If set, comments that are not associated with a specific
+	// AST node (as Doc or Comment) are excluded.
+	FilterUnassociatedComments
+)
+
 // separator is an empty //-style comment that is interspersed between
 // different comment groups when they are concatenated into a single group
 //
@@ -318,14 +329,9 @@ func lineAfterComment(c *Comment) token.Position {
 
 
 // MergePackageFiles creates a file AST by merging the ASTs of the
-// files belonging to a package. If complete is set, the package
-// files are assumed to contain the complete, unfiltered package
-// information. In this case, MergePackageFiles collects all entities
-// and all comments. Otherwise (complete == false), MergePackageFiles
-// excludes duplicate entries and does not collect comments that are
-// not attached to AST nodes.
+// files belonging to a package. The mode flags control merging behavior.
 //
-func MergePackageFiles(pkg *Package, complete bool) *File {
+func MergePackageFiles(pkg *Package, mode MergeMode) *File {
 	// Count the number of package docs, comments and declarations across
 	// all package files.
 	ndocs := 0
@@ -380,7 +386,7 @@ func MergePackageFiles(pkg *Package, complete bool) *File {
 		n := 0                        // number of filtered entries
 		for _, f := range pkg.Files {
 			for _, d := range f.Decls {
-				if !complete {
+				if mode&FilterFuncDuplicates != 0 {
 					// A language entity may be declared multiple
 					// times in different package files; only at
 					// build time declarations must be unique.
@@ -432,7 +438,7 @@ func MergePackageFiles(pkg *Package, complete bool) *File {
 
 	// Collect comments from all package files.
 	var comments []*CommentGroup
-	if complete {
+	if mode&FilterUnassociatedComments == 0 {
 		comments = make([]*CommentGroup, ncomments)
 		i := 0
 		for _, f := range pkg.Files {
-- 
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