public object Execute(FunctionEnvironment functionEnvironment, VariableEnvironment variableEnvironment)
{
foreach (Tuple <BogieLangType, string> param in Parameters)
{
if (!variableEnvironment.IsVariableDeclared(param.Item2))
{
throw new Exception("Missing parameter: " + param.Item2);
}
}
foreach (Body body in Body)
{
object obj = body.Execute(functionEnvironment, variableEnvironment);
if (obj != null)
{
BogieLangType returningType = BogieLangTypeHelpr.ObjectToType(obj);
if (returningType == ReturnBogieLangType)
{
return(obj);
}
else
{
throw new Exception("Function " + Identifier + " returned a " + returningType + ", but should return a " + ReturnBogieLangType);
}
}
}
return(null);
}
public object Execute(FunctionEnvironment functionEnvironment, VariableEnvironment variableEnvironment)
{
if (!functionEnvironment.IsFunctionDefined(Identifier))
{
throw new Exception("Calling undefined function: " + Identifier);
}
VariableEnvironment localVariables = new VariableEnvironment();
localVariables.ParentEnvironment = variableEnvironment;//todo: switch
FunctionDefinition functionDefinition = functionEnvironment.GetDefinedFunction(Identifier);
for (int i = 0; i < Arguments.Count; i++)
{
object obj = Arguments[i].Execute(functionEnvironment, variableEnvironment);
BogieLangType bogieLangType = BogieLangTypeHelpr.ObjectToType(obj);
if (functionDefinition.Parameters[i].Item1 == bogieLangType)
{
localVariables.DeclareVariable(functionDefinition.Parameters[i].Item2, functionDefinition.Parameters[i].Item1);
localVariables.DefineVariable(functionDefinition.Parameters[i].Item2, obj);
}
}
return(functionDefinition.Execute(functionEnvironment, localVariables));
}
public void DeclareVariable(string identifier, BogieLangType bogieLangType)
{
if (!IsVariableDeclared(identifier))
{
BogieLangTypeInstance bogieLangTypeInstance = new BogieLangTypeInstance();
bogieLangTypeInstance.BogieLangType = bogieLangType;
bogieLangTypeInstance.Identifer = identifier;
DeclaredVariables.Add(identifier, bogieLangTypeInstance);
}
else
{
throw new Exception("Redeclaration of: " + identifier);
}
}
public static FunctionDefinition Compile(BogieLangParser.FunctionDefinitionContext functionDefinitionContext)
{
FunctionDefinition result = new FunctionDefinition();
Antlr4.Runtime.Tree.ITerminalNode[] types = functionDefinitionContext.TYPE();
Antlr4.Runtime.Tree.ITerminalNode[] identifiers = functionDefinitionContext.IDENTIFIER();
result.ReturnBogieLangType = BogieLangTypeHelpr.StringToType(types[0].GetText());
result.Identifier = identifiers[0].GetText();
for (int i = 1; i < types.Length; i++)
{
BogieLangType bogieLangType = BogieLangTypeHelpr.StringToType(types[i].GetText());
string identifier = identifiers[i].GetText();
result.Parameters.Add(new Tuple <BogieLangType, string>(bogieLangType, identifier));
}
foreach (BogieLangParser.BodyContext context in functionDefinitionContext.body())
{
result.Body.Add(Runtime.Body.Compile(context));
}
return(result);
}
