public void AddNewContextCreationExpression(ParameterExpression contextParameter)
{
ConstructorInfo ctor = null;
Type[] parameterTypes = null;
Expression assignExpression = null;
NewExpression newExpression = null;
IEnumerable <Expression> parametersExpressions = null;
if (!_baseConstructorParameters.IsNullOrEmpty())
{
ParameterExpression parameter;
List <Type> types = new List <Type>();
var parametersSet = _baseConstructorParameters.ToDictionary(p => p.Name, p => p);
parametersExpressions = Parameters.Select(p => {
Type type = p.Type;
if (parametersSet.TryGetValue(p.Name, out parameter))
{
type = parameter.Type.MakeByRefType();
}
types.Add(type);
return(p);
}).ToList();
if (parametersSet.TryGetValue("Uniquifier", out parameter))
{
var expression = Expression.Default(parameter.Type);
types.Add(parameter.Type);
parametersExpressions = parametersExpressions.Concat(expression);
}
parameterTypes = types.ToArray();
}
else
{
var types = Parameters.Select(p => p.IsByRef ? p.Type.MakeByRefType() : p.Type);
parameterTypes = types.ToArray();
parametersExpressions = Parameters;
}
ctor = contextParameter.Type.GetConstructor(parameterTypes);
newExpression = Expression.New(ctor, parametersExpressions);
assignExpression = Expression.Assign(contextParameter, newExpression);
BlockExpressions.Insert(0, assignExpression);
}
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);
}
