/**
 * scope.h
 * Copyright (C) 2017 Alexander Koch
 * Scope definition and helper functions
 *
 * Used to store symbols and bind variables to a certain lifetime.
 */

#ifndef scope_h
#define scope_h

#include "../parser/ast.h"
#include "../adt/hashmap.h"

/**
 * A symbol is an info for the compiler.
 * It can be a function, a variable, a class, etc.
 * Based on the symbol the compiler can reload it at any time
 * and check it's definition.
 *
 * Examples:
 * Variable => immutable / mutable + name + type
 * Function => name + returntype
 * Class    => name + functions + attributes / variables
 */
typedef struct symbol_t {
    ast_t* node;
    int address;
    datatype_t* type;
    bool global;
    bool isClassParam;
    struct symbol_t* owner;
    int arraySize;
} symbol_t;

// Scope: contains symbols
typedef struct scope_t {
    ast_t* node;
    hashmap_t* symbols;
    hashmap_t* classes;
    struct scope_t* super;
    list_t* subscopes;
    int address;
    int flag;
    bool virtual;
} scope_t;

scope_t* scope_new();
void scope_free(scope_t* scope);
bool scope_requests(scope_t* scope, annotation_t ann);
bool scope_is_class(scope_t* scope, ast_class_t class, ast_t** node);
void scope_unflag(scope_t* scope);

#endif