AddVariable() public method

Adds a variable which will be scoped at the level of the final expression.
public AddVariable ( System.Linq.Expressions.ParameterExpression var ) : void
var System.Linq.Expressions.ParameterExpression
return void
ConditionalBuilder Class Documentation
Example #1
0
 private void EnsureTmp()
 {
     if (_tmp == null)
     {
         _tmp = Ast.Variable(typeof(object), "tmp");
         _cb.AddVariable(_tmp);
     }
 }
Example #2
0
        /// <summary>
        /// Gets an expression which is used for accessing this slot.  If the slot lookup fails the error expression
        /// is used again.
        /// 
        /// The default implementation just calls the TryGetValue method.  Subtypes of PythonTypeSlot can override
        /// this and provide a more optimal implementation.
        /// </summary>
        internal virtual void MakeGetExpression(PythonBinder/*!*/ binder, Expression/*!*/ codeContext, DynamicMetaObject instance, DynamicMetaObject/*!*/ owner, ConditionalBuilder/*!*/ builder) {
            ParameterExpression tmp = Ast.Variable(typeof(object), "slotTmp");
            Expression call = Ast.Call(
                 typeof(PythonOps).GetMethod("SlotTryGetValue"),
                 codeContext,
                 AstUtils.Convert(AstUtils.WeakConstant(this), typeof(PythonTypeSlot)),
                 instance != null ? instance.Expression : AstUtils.Constant(null),
                 owner.Expression,
                 tmp
            );

            builder.AddVariable(tmp);
            if (!GetAlwaysSucceeds) {
                builder.AddCondition(
                    call,
                    tmp
                );
            } else {
                builder.FinishCondition(Ast.Block(call, tmp));
            }
        }