private Expression CompileVariableContextExpression(int lambdaLevel)
{
PushPosition();
List <VariableInfo> variables = new List <VariableInfo>();
while (!IsPunctuationOf("->"))
{
string variableName = GetWord();
Move();
Type clazz = null;
if (IsPunctuationOf(":"))
{
SkipPunctuation(":");
string className = ReadClassName();
try
{
clazz = Types.GetType(className, LanguageService.GetImportedPackages());
}
catch
{
ThrowException(string.Format("{0} not defined.", className));
}
}
else
{
clazz = typeof(double);
}
variables.Add(new VariableInfo()
{
Name = variableName, Type = clazz
});
if (IsPunctuationOf(","))
{
Move();
}
}
Move();
Expression expression = Compile(lambdaLevel);
VariableContextExpression result = new VariableContextExpression(expression, variables.ToArray(), PeekPos(), Pos);
PopPosition();
return(result);
}
private void CheckVariableContextExpression(VariableContextExpression e, TypeCheckingContext context)
{
foreach (VariableInfo variable in e.Variables)
{
context.VariableContext.Set(variable.Name, context.CreateAutoCreatedVariableValue(variable.Type));
}
PerformTypeChecking(e.Expression, context);
foreach (VariableInfo variable in e.Variables)
{
context.VariableContext.Remove(variable.Name);
}
e.Type = typeof(VariableContextExpression);
e.Evaluator = new MathyExpressionEvaluator();
}
private object EvaluateVariableContextExpression(VariableContextExpression e, VariableContext context)
{
e.VariableContext = context;
return(e);
}
