public ParameterExpression BuildVariable(Expression expr, string name = null)
{
if (name == null)
{
name = expr.Type.Name + Interlocked.Increment(ref VarIndex);
}
var variable = Expression.Variable(
expr.Type,
name.IndexOf('<') >= 0 ? null : name);
BlockVariables.Add(variable);
BlockExpressions.Add(Expression.Assign(variable, expr));
return(variable);
}
public Expression BuildBlock(Expression expression)
{
#if FW4 || SILVERLIGHT
if (IsBlockDisable || BlockExpressions.Count == 0)
{
return(expression);
}
BlockExpressions.Add(expression);
expression = Expression.Block(BlockVariables, BlockExpressions);
BlockVariables.Clear();
BlockExpressions.Clear();
#endif
return(expression);
}
public Expression BuildBlock(Expression expression)
{
if (IsBlockDisable || BlockExpressions.Count == 0)
{
return(expression);
}
BlockExpressions.Add(expression);
expression = Expression.Block(BlockVariables, BlockExpressions);
while (BlockVariables.Count > 1)
{
BlockVariables.RemoveAt(BlockVariables.Count - 1);
}
while (BlockExpressions.Count > 1)
{
BlockExpressions.RemoveAt(BlockExpressions.Count - 1);
}
return(expression);
}