internal override bool TryEvaluate(Stack <Context> contextStack, CompilationState state, out Context context)
{
//Add the Identifier to the current context
var memberSymbol = contextStack.Any() ? contextStack.Peek().Symbol.FindMember(_value) :
state.Introspector.GetTypeSymbol(_value);
if (memberSymbol != null)
{
var identifierContext = new Context(string.Join(".", contextStack.Peek().FullPath, _value), memberSymbol);
if (_next == null)
{
//Last element => return IdentifierContext
context = identifierContext;
return(true);
}
else
{
//Push the identifier on the contextStack and keep going
contextStack.Push(identifierContext);
return(_next.TryEvaluate(contextStack, state, out context));
}
}
else
{
state.AddTypeError($"Could not find Member '{_value}' in Type '{contextStack.Peek().Symbol.ToDisplayString()}'!", HandlebarsTypeErrorKind.UnknownMember);
context = null;
return(false);
}
}
protected bool InsideEachLoopCheck(CompilationState state)
{
if (state.LoopLevel > 0)
{
return(true);
}
state.AddTypeError("SpecialExpressions can only exist inside EachBlocks", HandlebarsTypeErrorKind.SpecialExpressionOutsideEachLoop);
return(false);
}
internal override bool TryEvaluate(Stack <Context> contextStack, CompilationState state, out Context context)
{
if (!contextStack.Any() || contextStack.Count == 1)
{
state.AddTypeError("Error in MemberExpression: Empty ContextStack but PathUp Element ('../')!", HandlebarsTypeErrorKind.EmptyContextStack);
context = null;
return(false);
}
contextStack.Pop();
return(_next.TryEvaluate(contextStack, state, out context));
}
internal override bool TryEvaluate(CompilationState state, out Context context)
{
var ctLoopContext = IsCompileTimeLoop(state);
if (ctLoopContext != null)
{
context = new Context($"\"{ctLoopContext.Key}\"", state.Introspector.GetStringTypeSymbol());
return(true);
}
else
{
state.AddTypeError("KeyExpression outside a compiletime loop over an Object", HandlebarsTypeErrorKind.IllegalKeyExpression);
context = null;
return(false);
}
}
