public override object VisitFunctionVariableDeclarationStatement([NotNull] ClepsParser.FunctionVariableDeclarationStatementContext context) { ClepsVariable variable = Visit(context.variableDeclaration()) as ClepsVariable; VariableManager variableManager = VariableManagers.Last(); if (!variableManager.IsVariableNameAvailable(variable.VariableName)) { string errorMessage = String.Format("Variable {0} is already defined", variable.VariableName); Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage)); //Use a different variable name to avoid stopping the compilation string newVariableName = variableManager.GetAvailableVariableName(variable.VariableName); variable = new ClepsVariable(newVariableName, variable.VariableType, variable.IsConstant); } IValue value = null; if (context.rightHandExpression() != null) { value = Visit(context.rightHandExpression()) as IValue; if (variable.VariableType != value.ExpressionType) { throw new NotImplementedException("Assignment for non identical types not supported yet"); } } IValueRegister variableRegister = CurrMethodGenerator.CreateNewVariable(variable, value); variableManager.AddLocalVariable(variable, variableRegister); return(variable); }
public override IMethodValue VisitFunctionAssignment_Ex([NotNull] ClepsParser.FunctionAssignmentContext context) { var oldCurrMethodRegister = CurrMethodGenerator; VariableManager variableManager = new VariableManager(); VariableManagers.Add(variableManager); ClepsType returnType = VoidClepsType.GetVoidType(); if (context.FunctionReturnType != null) { returnType = Visit(context.FunctionReturnType) as ClepsType; } List <ClepsVariable> functionParameters = context._FunctionParameters.Select(p => Visit(p) as ClepsVariable).ToList(); FunctionClepsType functionType = new FunctionClepsType(functionParameters.Select(p => p.VariableType).ToList(), returnType); var newMethod = CodeGenerator.CreateNewMethod(functionType); CurrMethodGenerator = newMethod; CurrMethodGenerator.SetFormalParameterNames(functionParameters.Select(p => p.VariableName).ToList()); functionParameters.ForEach(variable => { variableManager.AddLocalVariable(variable, CurrMethodGenerator.GetFormalParameterRegister(variable.VariableName)); }); Visit(context.statementBlock()); VariableManagers.RemoveAt(VariableManagers.Count - 1); CurrMethodGenerator = oldCurrMethodRegister; return(newMethod); }
private IValueRegister GetVariableRegisterOrNullWithError([NotNull] ClepsParser.VariableAssignmentContext context) { string variableName = Visit(context.variable()) as string; var variableManager = VariableManagers.Last(); IValueRegister register; if (!variableManager.IsVariableAvailable(variableName)) { string errorMessage = String.Format("Variable {0} does not exist", variableName); Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage)); register = null; } else { register = variableManager.GetVariableRegister(variableName); } return(register); }