private void Visit(ProcedureDeclarationStmt declarationStmt)
{
if (!Symbols.ExistsInCurrentScope(declarationStmt.Identifier))
{
int currentScope = Symbols.CurrentScope;
int procedureScope = Symbols.EnterScope();
//ReturnTypeStack.Push(TypeInfo.BasicVoid);
var parameterSymbols = new List <ParameterSymbol>();
foreach (var parameter in declarationStmt.Parameters)
{
var parameterSymbol = new ParameterSymbol(parameter, procedureScope);
Symbols.AddSymbol(parameterSymbol);
parameterSymbols.Add(parameterSymbol);
}
var procSymbol = new ProcedureSymbol(declarationStmt, parameterSymbols, currentScope);
Symbols.AddSymbol(procSymbol);
FunctionStack.Push(procSymbol);
declarationStmt.DeclarationSymbol = procSymbol;
Visit(declarationStmt.ProcedureBlock, false);
Symbols.LeaveScope();
//ReturnTypeStack.Pop();
FunctionStack.Pop();
}
else
{
AddError(string.Format("'{0}' is already declared in current scope", declarationStmt.Identifier), declarationStmt);
}
}
private ProcedureDeclarationStmt ParseProcedureDeclaration()
{
Match(TokenType.KwProcedure);
ProcedureDeclarationStmt statement = new ProcedureDeclarationStmt(AcceptedToken);
statement.Identifier = ParseIdentifier();
Match(TokenType.LParen);
statement.Parameters = ParseParameters();
Match(TokenType.RParen);
Match(TokenType.LineTerm);
statement.ProcedureBlock = ParseBlock();
return(statement);
}
public ProcedureSymbol(ProcedureDeclarationStmt declaration, List <ParameterSymbol> parameters, int scope) :
base(declaration, parameters, scope)
{
}