slime/src/error.c

typedef enum {
    Error_Type_Ill_Formed_List,
    Error_Type_Wrong_Number_Of_Arguments,
    Error_Type_Type_Missmatch,
    Error_Type_Symbol_Not_Defined,
    Error_Type_Not_A_Function,
    Error_Type_Not_Yet_Implemented,
    Error_Type_Unknown_Error,
} Error_Type;

typedef struct {
    Error_Type type;
    Ast_Node*  location;
} Error;

Error* error;

void delete_error() {
    if (error) {
        free(error);
        error = nullptr;
    }
}

void create_error(Error_Type type, Ast_Node* location) {
    delete_error();

    error = new(Error);
    error->type = type;
    error->location = location;
}

char* Error_Type_to_string(Error_Type type) {
    switch (type) {
    case Error_Type_Ill_Formed_List:           return "Ill formed list";
    case Error_Type_Not_A_Function:            return "Not a function";
    case Error_Type_Symbol_Not_Defined:        return "Symbol not defined";
    case Error_Type_Wrong_Number_Of_Arguments: return "Wrong number of arguments";
    case Error_Type_Type_Missmatch:            return "Type Missmatch";
    case Error_Type_Not_Yet_Implemented:       return "Not yet implemented";
    default:                                   return "Unknown Error";
    }
}