public override Statement VisitExpressionStatement(ExpressionStatement statement)
{
if (statement == null) return null;
return base.VisitExpressionStatement((ExpressionStatement)statement.Clone());
}
/// <summary>
/// </summary>
/// <param name="expr_stat">Cloned</param>
/// <returns></returns>
public override Statement VisitExpressionStatement(ExpressionStatement expr_stat) {
// The AST may have shared nodes.
if (this.orig2Copy.ContainsKey(expr_stat)) {
return this.orig2Copy[expr_stat];
}
Expression newexpr = this.VisitExpression(expr_stat.Expression);
if (newexpr == null) {
// turn into nop statement
return new Statement(NodeType.Nop);
}
// check for special case where we now have a PopExpression as the expression.
// this corresponds to a push(pop), which is a noop and we need to represent it that way.
if (newexpr.NodeType == NodeType.Pop && !(newexpr is UnaryExpression)) {
return new Statement(NodeType.Nop);
}
ExpressionStatement copy = (ExpressionStatement)expr_stat.Clone();
copy.Expression = newexpr;
copy.SourceContext = this.current_source_context;
this.orig2Copy.Add(expr_stat, copy);
return copy;
}