gofmt: don't print ()'s around function-typed results (not needed anymore)

- add extra test cases to go/printer tests
- apply gofmt to src and misc

R=rsc
CC=golang-dev
http://codereview.appspot.com/223041

3 files changed, 17 insertions, 9 deletions

diff --git a/src/pkg/go/printer/nodes.go b/src/pkg/go/printer/nodes.go
index dd6b1db6b..6096751bd 100644
--- a/src/pkg/go/printer/nodes.go
+++ b/src/pkg/go/printer/nodes.go
@@ -241,19 +241,13 @@ func (p *printer) signature(params, result []*ast.Field, multiLine *bool) {
 	p.parameters(params, multiLine)
 	if result != nil {
 		p.print(blank)
-
 		if len(result) == 1 && result[0].Names == nil {
-			// single anonymous result; no ()'s unless it's a function type
-			f := result[0]
-			if _, isFtyp := f.Type.(*ast.FuncType); !isFtyp {
-				p.expr(f.Type, multiLine)
-				return
-			}
+			// single anonymous result; no ()'s
+			p.expr(result[0].Type, multiLine)
+			return
 		}
-
 		p.parameters(result, multiLine)
 	}
-	return
 }
 
 
diff --git a/src/pkg/go/printer/testdata/declarations.golden b/src/pkg/go/printer/testdata/declarations.golden
index 9998103cf..b15e52ad6 100644
--- a/src/pkg/go/printer/testdata/declarations.golden
+++ b/src/pkg/go/printer/testdata/declarations.golden
@@ -471,6 +471,13 @@ func _() {
 }
 
 
+// formatting of function results
+func _() func()				{}
+func _() func(int)			{ return nil }
+func _() func(int) int			{ return nil }
+func _() func(int) func(int) func()	{ return nil }
+
+
 // formatting of consecutive single-line functions
 func _()	{}
 func _()	{}
diff --git a/src/pkg/go/printer/testdata/declarations.input b/src/pkg/go/printer/testdata/declarations.input
index fd80cb626..1d1dc45f0 100644
--- a/src/pkg/go/printer/testdata/declarations.input
+++ b/src/pkg/go/printer/testdata/declarations.input
@@ -468,6 +468,13 @@ func _() {
 }
 
 
+// formatting of function results
+func _() func() {}
+func _() func(int) { return nil }
+func _() func(int) int { return nil }
+func _() func(int) func(int) func() { return nil }
+
+
 // formatting of consecutive single-line functions
 func _() {}
 func _() {}