public object Evaluate(Token contextToken, List<ExpressionArgument> args, ExecutionState state)
{
object o = state.HasVariable(variableToken.Value) ? state.GetVariable(variableToken.Value) : null;
if (o is IArgumentListEvaluatorExpression)
return ((IArgumentListEvaluatorExpression)o).Evaluate(contextToken, args, state);
else
return SystemTypeEvaluator.EvaluateArguments(state, o, args, contextToken);
}
public object Evaluate(ExecutionState state, Token contextToken)
{
// ensure that the variable has been set to some value first
if(!state.HasVariable(variableToken.Value))
throw new InstructionExecutionException("I can't evaluate the word \"" + variableToken.Value + "\". Either it doesn't mean anything or you forgot to assign it a value.", variableToken);
return state.GetVariable(variableToken.Value);
}
public object Evaluate(ExecutionState state, Token contextToken)
{
// ensure that the variable has been set to some value first
if (!state.HasVariable(variableToken.Value))
{
throw new InstructionExecutionException("I can't evaluate the word \"" + variableToken.Value + "\". Either it doesn't mean anything or you forgot to assign it a value.", variableToken);
}
return(state.GetVariable(variableToken.Value));
}
public object Evaluate(Token contextToken, List <ExpressionArgument> args, ExecutionState state)
{
object o = state.HasVariable(variableToken.Value) ? state.GetVariable(variableToken.Value) : null;
if (o is IArgumentListEvaluatorExpression)
{
return(((IArgumentListEvaluatorExpression)o).Evaluate(contextToken, args, state));
}
else
{
return(SystemTypeEvaluator.EvaluateArguments(state, o, args, contextToken));
}
}
public object EvaluateProperty(string propertyName, Token token, ExecutionState state)
{
object o = state.HasVariable(variableToken.Value) ? state.GetVariable(variableToken.Value) : null;
if (o is IPropertyEvaluatorExpression)
{
object val = ((IPropertyEvaluatorExpression)o).EvaluateProperty(propertyName, token, state);
if(val != null)
if (val.ToString() == VariableExpression.InvalidProperty)
throw new InstructionExecutionException("\"" + propertyName + "\" is not a valid property of this variable.", token);
return val;
}
else
return SystemTypeEvaluator.EvaluateProperty(o, propertyName, token);
}
public object EvaluateProperty(string propertyName, Token token, ExecutionState state)
{
object o = state.HasVariable(variableToken.Value) ? state.GetVariable(variableToken.Value) : null;
if (o is IPropertyEvaluatorExpression)
{
object val = ((IPropertyEvaluatorExpression)o).EvaluateProperty(propertyName, token, state);
if (val != null)
{
if (val.ToString() == VariableExpression.InvalidProperty)
{
throw new InstructionExecutionException("\"" + propertyName + "\" is not a valid property of this variable.", token);
}
}
return(val);
}
else
{
return(SystemTypeEvaluator.EvaluateProperty(o, propertyName, token));
}
}
