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Code Releases Activity

- gofmt-ify walk.go

Browse Source 
- fixed several bugs

R=rsc
http://go/go-review/1015015
This commit is contained in:
Robert Griesemer 2009-10-26 19:21:13 -07:00
parent 5a75ac88c9
commit ae3c9992ae
1 changed files with 67 additions and 44 deletions
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111
src/pkg/go/ast/walk.go
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@ -69,18 +69,28 @@ func walkBlockStmt(v Visitor, b *BlockStmt) {
// Walk visits each of the children of n.
//
func Walk(v Visitor, node interface{}) {
if node != nil && !v.Visit(node) {
if node == nil || !v.Visit(node) {
return;
}
// walk children
// (the order of the cases matches the order
// of the corresponding declaration in ast.go)
switch n := node.(type) {
// Comments and fields
case *Comment:
// nothing to do
case *CommentGroup:
for _, c := range n.List {
Walk(v, c);
}
// TODO(gri): Keep comments in a list/vector instead
// of linking them via Next. Following next will lead
// to multiple visits and potentially n^2 behavior
// since Doc and Comments fields point into the global
// comments list.
case *Field:
walkCommentGroup(v, n.Doc);
walkIdentList(v, n.Names);
@ -91,51 +101,54 @@ func Walk(v Visitor, node interface{}) {
walkCommentGroup(v, n.Comment);
// Expressions
case *BadExpr, *Ident, *Ellipsis, *BasicLit:
// nothing to do
case *StringList:
for _, x := range n.Strings {
Walk(v, x);
}
case *FuncLit:
Walk(v, n.Type);
if n != nil {
Walk(v, n.Type);
}
walkBlockStmt(v, n.Body);
case *CompositeLit:
Walk(v, n.Type);
walkExprList(v, n.Elts);
case *ParenExpr:
Walk(v, n.X);
case *SelectorExpr:
Walk(v, n.X);
if n.Sel != nil {
Walk(v, n.Sel);
}
walkIdent(v, n.Sel);
case *IndexExpr:
Walk(v, n.X);
Walk(v, n.Index);
Walk(v, n.End);
case *TypeAssertExpr:
Walk(v, n.X);
Walk(v, n.Type);
case *CallExpr:
Walk(v, n.Fun);
walkExprList(v, n.Args);
case *StarExpr:
Walk(v, n.X);
case *UnaryExpr:
Walk(v, n.X);
case *BinaryExpr:
Walk(v, n.X);
Walk(v, n.Y);
case *KeyValueExpr:
Walk(v, n.Key);
Walk(v, n.Value);
@ -144,76 +157,82 @@ func Walk(v Visitor, node interface{}) {
case *ArrayType:
Walk(v, n.Len);
Walk(v, n.Elt);
case *StructType:
walkFieldList(v, n.Fields);
case *FuncType:
walkFieldList(v, n.Params);
walkFieldList(v, n.Results);
case *InterfaceType:
walkFieldList(v, n.Methods);
case *MapType:
Walk(v, n.Key);
Walk(v, n.Value);
case *ChanType:
Walk(v, n.Value);
// Statements
case *BadStmt:
// nothing to do
case *DeclStmt:
Walk(v, n.Decl);
case *EmptyStmt:
// nothing to do
case *LabeledStmt:
walkIdent(v, n.Label);
Walk(v, n.Stmt);
case *ExprStmt:
Walk(v, n.X);
case *IncDecStmt:
Walk(v, n.X);
case *AssignStmt:
walkExprList(v, n.Lhs);
walkExprList(v, n.Rhs);
case *GoStmt:
if n.Call != nil {
Walk(v, n.Call);
}
case *DeferStmt:
if n.Call != nil {
Walk(v, n.Call);
}
case *ReturnStmt:
walkExprList(v, n.Results);
case *BranchStmt:
walkIdent(v, n.Label);
case *BlockStmt:
walkStmtList(v, n.List);
case *IfStmt:
Walk(v, n.Init);
Walk(v, n.Cond);
walkBlockStmt(v, n.Body);
Walk(v, n.Else);
case *CaseClause:
walkExprList(v, n.Values);
walkStmtList(v, n.Body);
case *SwitchStmt:
Walk(v, n.Init);
Walk(v, n.Tag);
walkBlockStmt(v, n.Body);
case *TypeCaseClause:
walkExprList(v, n.Types);
walkStmtList(v, n.Body);
@ -222,12 +241,12 @@ func Walk(v Visitor, node interface{}) {
Walk(v, n.Init);
Walk(v, n.Assign);
walkBlockStmt(v, n.Body);
case *CommClause:
Walk(v, n.Lhs);
Walk(v, n.Rhs);
walkStmtList(v, n.Body);
case *SelectStmt:
walkBlockStmt(v, n.Body);
@ -236,13 +255,13 @@ func Walk(v Visitor, node interface{}) {
Walk(v, n.Cond);
Walk(v, n.Post);
walkBlockStmt(v, n.Body);
case *RangeStmt:
Walk(v, n.Key);
Walk(v, n.Value);
Walk(v, n.X);
walkBlockStmt(v, n.Body);
// Declarations
case *ImportSpec:
walkCommentGroup(v, n.Doc);
@ -251,34 +270,38 @@ func Walk(v Visitor, node interface{}) {
Walk(v, x);
}
walkCommentGroup(v, n.Comment);
case *ValueSpec:
walkCommentGroup(v, n.Doc);
walkIdentList(v, n.Names);
Walk(v, n.Type);
walkExprList(v, n.Values);
walkCommentGroup(v, n.Comment);
case *TypeSpec:
walkCommentGroup(v, n.Doc);
walkIdent(v, n.Name);
Walk(v, n.Type);
walkCommentGroup(v, n.Comment);
case *BadDecl:
// nothing to do
case *GenDecl:
walkCommentGroup(v, n.Doc);
for _, s := range n.Specs {
Walk(v, s);
}
case *FuncDecl:
walkCommentGroup(v, n.Doc);
if n.Recv != nil {
Walk(v, n.Recv);
}
walkIdent(v, n.Name);
Walk(v, n.Type);
if n.Type != nil {
Walk(v, n.Type);
}
walkBlockStmt(v, n.Body);
// Files and packages