private List <Expression> VisitParameters(AngularParser.FunctionCallContext context)
{
var parameterExpressions = new List <Expression>();
var parameterElements = context.assignment();
_actualScope.Push(new ScopeInfo(_scopeParameter));
foreach (var parameterElement in parameterElements)
{
var parameterExpression = Visit(parameterElement);
parameterExpressions.Add(parameterExpression);
}
_actualScope.Pop();
return(parameterExpressions);
}
public override Expression VisitFunctionCall(AngularParser.FunctionCallContext context)
{
var callingContext = _actualScope.Peek();
var functionName = context.identifier().GetText();
MethodCallExpression callExpression;
if (callingContext.ScopeExpression.Type == typeof(JavascriptObject) || callingContext.ScopeExpression.Type == typeof(object))
{
var delegateExpression = Expression.Call(_helperParameter, JavascriptObjectHelper.SelectFunctionInfo, callingContext.ScopeExpression,
Expression.Constant(null, typeof(object)), Expression.Constant(functionName));
List <Expression> parameterExpressions = VisitParameters(context);
CastAllParameter(parameterExpressions, typeof(object));
var variables = Expression.NewArrayInit(typeof(object), parameterExpressions);
callExpression = Expression.Call(delegateExpression, DynamicInvoke, variables);
}
else
{
var functionDelegate = callingContext.ScopeExpression.Type.GetMethod(functionName);
if (functionDelegate == null)
{
throw new AngularException($"Unknown method: {callingContext.ScopeExpression.Type.Name}.{functionName}");
}
List <Expression> parameterExpressions = VisitParameters(context);
var requiredParameters = functionDelegate.GetParameters();
if (!TryMatchParameters(parameterExpressions, requiredParameters))
{
throw new AngularException($"Parameterrs not matching the provided parameters for {callingContext.ScopeExpression.Type.Name}.{functionName} Parameters: {string.Join(", ", parameterExpressions.Select(e => e.Type.Name))}");
}
callExpression = Expression.Call(callingContext.ScopeExpression, functionDelegate, parameterExpressions);
}
var variable = Expression.Variable(callExpression.Type);
var varibaleInit = Expression.Assign(variable, callExpression);
_tryGetInfos.Add(new TryGetInfo
{
Variable = variable,
VariableInit = varibaleInit
});
return(variable);
}
