public override Node visitFunctionDeclaration(JuliarParser.FunctionDeclarationContext ctx)
{
string funcName = ctx.funcName().Text;
FunctionDeclNode functionDeclNode = new FunctionDeclNode(funcName, new List <Node>());
callStack.Push(funcName);
symbolTable.addLevel(funcName + "_" + functionDeclCount++);
new IterateOverContext(this, ctx, this, functionDeclNode);
callStack.Pop();
popScope(functionDeclNode.Type);
functionNodeMap[funcName] = functionDeclNode;
return(functionDeclNode);
}
public override Node visitSubtract(JuliarParser.SubtractContext ctx)
{
string text = ctx.subtraction().Text;
if ("subtract".Equals(text) || "-".Equals(text))
{
if (ctx.types().size() == 2)
{
BinaryNode node = new BinaryNode();
try
{
/*
* Node n = node.makeNode(
* Operation.subtract,
* ctx.types(0).accept(this),
* ctx.types(1).accept(this));
* n.addInst( funcContextStack, n);
*/
}
catch (Exception ex)
{
JuliarLogger.log(ex.Message, ex);
}
}
if (ctx.types().size() > 2)
{
IList <IntegralTypeNode> data = new List <IntegralTypeNode>();
for (int i = 0; i < ctx.types().size(); i++)
{
data.Add((IntegralTypeNode)ctx.types(i).accept(this));
}
AggregateNode aggregateNode = new AggregateNode(Operation.subtract, data);
FunctionDeclNode functionDeclNode = (FunctionDeclNode)funcContextStack.Peek();
functionDeclNode.addInst(aggregateNode);
}
}
return(null);
}
public static IList <Node> evalFunctionCall(Node node, ActivationFrameStack activationFrame, string mainFunctionName, IDictionary <string, Node> functionNodeMap, Interpreter callback)
{
FunctionCallNode functionCallNode = (FunctionCallNode)node;
string functionToCall = functionCallNode.functionName();
//ActivationFrame evalFrame = activationFrameStack.pop();
bool isPrimitive = EvaluatePrimitives.evalIfPrimitive(node, activationFrame.peek(), callback);
//activationFrameStack.push( evalFrame );
if (isPrimitive)
{
return(new List <>());
}
// main should only be called from the compliationUnit
if (functionCallNode.Equals(mainFunctionName))
{
return(new List <>());
}
FunctionDeclNode functionDeclNode = (FunctionDeclNode)functionNodeMap[functionToCall];
if (functionDeclNode != null)
{
ActivationFrame frame = new ActivationFrame();
frame.frameName = functionToCall;
IList <VariableNode> sourceVariables = new List <VariableNode>();
IList <VariableDeclarationNode> targetVariables = new List <VariableDeclarationNode>();
foreach (Node v in node.Instructions)
{
if (v is VariableNode)
{
sourceVariables.Add((VariableNode)v);
}
}
foreach (Node v in functionDeclNode.Instructions)
{
if (v is VariableDeclarationNode)
{
targetVariables.Add((VariableDeclarationNode)v);
}
}
if (sourceVariables.Count != targetVariables.Count)
{
throw new Exception("Source and target variable count do not match");
}
// since the function that is getting called can reference the variable using the
// formal parameters of the function this code will match the calling functions data
// with the target calling functions variable name.
for (int i = 0; i < sourceVariables.Count; i++)
{
VariableNode variableNode = (VariableNode)targetVariables[0].Instructions[1];
if (variableNode.integralTypeNode == sourceVariables[i].integralTypeNode)
{
frame.variableSet[variableNode.variableName] = activationFrame.peek().variableSet[sourceVariables[i].variableName];
}
else
{
throw new Exception("data types are not the same");
}
}
activationFrame.push(frame);
IList <Node> statements = getFunctionStatements(functionDeclNode.Instructions);
callback.execute(statements);
activationFrame.pop();
//activationFrame.push(frame);
//execute(functionDeclNode.getInstructions());
return(new List <Node>());
}
else
{
FinalNode primitiveArg = new FinalNode();
primitiveArg.DataString = functionToCall;
PrimitiveNode primitiveNode = new PrimitiveNode();
primitiveNode.addInst(primitiveArg);
foreach (Node primArgs in node.Instructions)
{
if (primArgs is VariableNode || primArgs is IntegralTypeNode)
{
primitiveNode.addInst(primArgs);
}
}
return(EvaluatePrimitives.evalPrimitives(primitiveNode, activationFrame.peek(), callback));
}
}