public void visit(ProcCall procCall)
{
if (stack.level >= Dictionary.MAX_NEST_LEVEL)
{
throw new Exception(Dictionary.max_nest_level_exc);
}
if (!stack.containsProcedure(procCall.procName))
{
throw new Exception("Don't know how to " + procCall.procName);
}
ProcDecl returnedProcedure = stack.getProcedure(procCall.procName);
if (procCall.arguments.Count != returnedProcedure.parameters.Count)
{
throw new Exception("Arguments number mismatch in " + procCall.procName);
}
stack.levelUp();
pushParams(returnedProcedure, procCall);
procCall.output = returnedProcedure;
foreach (IAST child in procCall.output.children)
{
child.accept(this);
}
stack.clearParams();
stack.levelDown();
}
private void pushParams(ProcDecl declaration, ProcCall call)
{
for (int i = 0; i < declaration.parameters.Count; i++)
{
call.arguments[i].accept(this);
stack.pushLocal(declaration.parameters[i].varNode.name, call.arguments[i].output);
}
}
public void visit(ProcDecl procDecl)
{
if (scope.scopeLevel == Dictionary.MAX_NEST_LEVEL)
{
throw new Exception(Dictionary.max_nest_level_exc);
}
ProcedureSymbol procSym = new ProcedureSymbol(procDecl.name);
scope.define(procSym);
scope = new ScopeSymbolTable(scope.scopeLevel + 1, scope);
foreach (Param param in procDecl.parameters)
{
VarSymbol paramSymbol = createParamSymbol(param);
scope.define(paramSymbol);
procSym.parameters.Add(paramSymbol);
}
foreach (IAST child in procDecl.children)
{
child.accept(this);
}
scope = scope.globalScope;
}
public void pushProcedure(ProcDecl procedure)
{
procedures[procedure.name] = procedure;
}
public void visit(ProcDecl procDecl)
{
stack.pushProcedure(procDecl);
}
