// case *InterfaceType:
		// case *FuncType:
		// case *MapType:
		// case *ChanType:

		// statements
		// case *EmptyStmt:
		// case *LabeledStmt:
		// case *BlockStmt:
		// case *ExprStmt:
		case *SendStmt:
			m = n.Chan
		// case *DeclStmt:
		case *AssignStmt:
			m = n.Lhs
		// case *BranchStmt:
		// case *CallStmt:
		// case *ReturnStmt:
		// case *IfStmt:
		// case *ForStmt:
		// case *SwitchStmt:

	case *DeclStmt:
		Walk(v, n.Decl)

	case *EmptyStmt:
		// nothing to do

	case *LabeledStmt:
		Walk(v, n.Label)
		Walk(v, n.Stmt)

	case *ExprStmt:
		Walk(v, n.X)

	case *SendStmt:
		Walk(v, n.Chan)
		Walk(v, n.Value)

	case *IncDecStmt:
		Walk(v, n.X)

	case *AssignStmt:
		walkList(v, n.Lhs)
		walkList(v, n.Rhs)

	case *GoStmt:
		Walk(v, n.Call)

		for i, clause := range s.Body {
			if clause == nil {
				continue // error reported before
			}

			// clause.Comm must be a SendStmt, RecvStmt, or default case
			valid := false
			var rhs syntax.Expr // rhs of RecvStmt, or nil
			switch s := clause.Comm.(type) {
			case nil, *syntax.SendStmt:
				valid = true
			case *syntax.AssignStmt:
				if _, ok := s.Rhs.(*syntax.ListExpr); !ok {
					rhs = s.Rhs
				}

			clause, _ := s.(*ast.CommClause)
			if clause == nil {
				continue // error reported before
			}

			// clause.Comm must be a SendStmt, RecvStmt, or default case
			valid := false
			var rhs ast.Expr // rhs of RecvStmt, or nil
			switch s := clause.Comm.(type) {
			case nil, *ast.SendStmt:
				valid = true
			case *ast.AssignStmt:
				if len(s.Rhs) == 1 {
					rhs = s.Rhs[0]
				}
			case *ast.ExprStmt:

	b := new(BadExpr)
	b.pos = p.pos()
	return b
}

// ----------------------------------------------------------------------------
// Statements

// SimpleStmt = EmptyStmt | ExpressionStmt | SendStmt | IncDecStmt | Assignment | ShortVarDecl .
func (p *parser) simpleStmt(lhs Expr, keyword token) SimpleStmt {
	if trace {
		defer p.trace("simpleStmt")()
	}

	if keyword == _For && p.tok == _Range {

	GoStmt | ReturnStmt | BreakStmt | ContinueStmt | GotoStmt |
	FallthroughStmt | Block | IfStmt | SwitchStmt | SelectStmt | ForStmt |
	DeferStmt .

SimpleStmt = EmptyStmt | ExpressionStmt | SendStmt | IncDecStmt | Assignment | ShortVarDecl .
</pre>

<h3 id="Terminating_statements">Terminating statements</h3>

<p>
A <i>terminating statement</i> interrupts the regular flow of control in

	GoStmt | ReturnStmt | BreakStmt | ContinueStmt | GotoStmt |
	FallthroughStmt | Block | IfStmt | SwitchStmt | SelectStmt | ForStmt |
	DeferStmt .

SimpleStmt = EmptyStmt | ExpressionStmt | SendStmt | IncDecStmt | Assignment | ShortVarDecl .
</pre>

<h3 id="Terminating_statements">Terminating statements</h3>

<p>
A <i>terminating statement</i> interrupts the regular flow of control in