private Expression MakeAssignBlock(ParameterExpression variable, Expression value)
{
var node = (BlockExpression)value;
var newBlock = new ReadOnlyCollectionBuilder <Expression>(node.Expressions);
Expression blockRhs = newBlock[newBlock.Count - 1];
if (blockRhs.NodeType == ExpressionType.Label)
{
var label = (LabelExpression)blockRhs;
GotoRewriteInfo curVariable = new GotoRewriteInfo(variable, Expression.Label(label.Target.Name + "_voided"));
var rewriter = new GotoRewriter(this, curVariable, label.Target);
for (int i = 0; i < newBlock.Count - 1; i++)
{
newBlock[i] = rewriter.Visit(newBlock[i]);
}
newBlock[newBlock.Count - 1] = MakeAssignLabel(variable, curVariable, rewriter.Visit(label.DefaultValue));
}
else
{
newBlock[newBlock.Count - 1] = MakeAssign(variable, newBlock[newBlock.Count - 1]);
}
return(Expression.Block(node.Variables, newBlock));
}
private Expression MakeAssignLabel(ParameterExpression variable, LabelExpression value)
{
GotoRewriteInfo curVariable = new GotoRewriteInfo(variable, Expression.Label(value.Target.Name + "_voided"));
var defaultValue = new GotoRewriter(this, curVariable, value.Target).Visit(value.DefaultValue);
return(MakeAssignLabel(variable, curVariable, defaultValue));
}
