private static object ResolveLambdaExpressionBindTarget(string bindAs, LambdaRepository lambdaRepo, ScopeChain scopeChain)
{
Func <object> lambda = lambdaRepo.Resolve(bindAs, scopeChain);
object target = lambda();
return(target);
}
private static object ResolveScopeWalkBindTarget(string bindAs, LambdaRepository lambdaRepo, ScopeChain scopeChain)
{
int lastIdxOf;
int depth = BindHelper.CountInstancesOfPattern(bindAs, @"..\", out lastIdxOf);
object target = BindHelper.ResolveBindTarget(bindAs.Substring(lastIdxOf + 3, bindAs.Length - (depth * 3)), lambdaRepo, scopeChain, depth);
return(target);
}
private static object ResolveVariableReferenceBindTarget(string bindAs, LambdaRepository lambdaRepo, ScopeChain scopeChain)
{
object target = null;
int dot = bindAs.IndexOf('.');
if (dot > -1)
{
target = scopeChain.AccessVariable(bindAs.Substring(0, dot));
scopeChain.Push(target);
target = BindHelper.ResolveBindTarget(bindAs.Substring(++dot, bindAs.Length - dot), lambdaRepo, scopeChain);
scopeChain.Pop();
}
else
{
target = scopeChain.AccessVariable(bindAs);
}
return(target);
}
public static object ResolveBindTarget(string bindAs, LambdaRepository lambdaRepo, ScopeChain scopeChain, int scopeLinkDepth = 0)
{
object target = null;
object localScope = scopeChain.Peek(scopeLinkDepth);
if (bindAs.Length == 1 && bindAs[0] == '$')//append bindto obj
{
target = localScope;
}
else if (bindAs[0] == '$' && bindAs[1] == '.')//reflect from bindto object
{
target = BindHelper.ResolveRootedBindTarget(bindAs, localScope);
}
else if (bindAs[0] == ':')//variable reference
{
target = BindHelper.ResolveVariableReferenceBindTarget(bindAs, lambdaRepo, scopeChain);
}
else if (bindAs[0] == '.' && bindAs[1] == '.' && bindAs[2] == '\\')//scope chain walk ..\
{
target = BindHelper.ResolveScopeWalkBindTarget(bindAs, lambdaRepo, scopeChain);
}
else if (BindHelper.IsLambdaExpression(bindAs))//lambda expression
{
target = BindHelper.ResolveLambdaExpressionBindTarget(bindAs, lambdaRepo, scopeChain);
}
else//simple bind
{
target = ReflectionHelper.Expression.ReflectItem(localScope, bindAs);
}
return(target);
}
private TemplateEngine WithLambdaRepository(LambdaRepository repo)
{
_lambdaRepo = repo;
return(this);
}