public Expression AutoInline(InvocationExpression expression)
{
this.isLocked = true;
if (expression == null)
{
throw new ArgumentNullException("expression");
}
var lambda = (LambdaExpression)expression.Expression;
var childScope = new ExpressionRewriter(this);
var lambdaParams = lambda.Parameters;
var invokeArgs = expression.Arguments;
if (lambdaParams.Count != invokeArgs.Count)
{
throw new InvalidOperationException("Lambda/invoke mismatch");
}
for (var i = 0; i < lambdaParams.Count; i++)
{
childScope.Substitute(lambdaParams[i], invokeArgs[i]);
}
return(childScope.Apply(lambda.Body));
}
public static Expression <Func <T, bool> > And <T>(
this Expression <Func <T, bool> > expression1, Expression <Func <T, bool> > expression2)
{
var newY =
new ExpressionRewriter().Substitute(expression2.Parameters[0], expression1.Parameters[0]).Inline()
.Apply(expression2.Body);
return(Expression.Lambda <Func <T, bool> >(Expression.AndAlso(expression1.Body, newY), expression1.Parameters));
}
private ExpressionRewriter(ExpressionRewriter parent)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
this.subst = new Dictionary<Expression, Expression>(parent.subst);
this.inline = parent.inline;
}
private ExpressionRewriter(ExpressionRewriter parent)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
this.subst = new Dictionary <Expression, Expression>(parent.subst);
this.inline = parent.inline;
}
public Expression AutoInline(InvocationExpression expression)
{
this.isLocked = true;
if (expression == null)
{
throw new ArgumentNullException("expression");
}
var lambda = (LambdaExpression)expression.Expression;
var childScope = new ExpressionRewriter(this);
var lambdaParams = lambda.Parameters;
var invokeArgs = expression.Arguments;
if (lambdaParams.Count != invokeArgs.Count)
{
throw new InvalidOperationException("Lambda/invoke mismatch");
}
for (var i = 0; i < lambdaParams.Count; i++)
{
childScope.Substitute(lambdaParams[i], invokeArgs[i]);
}
return childScope.Apply(lambda.Body);
}