42sh/src/utils/ast/ast.h

#ifndef AST_H
#define AST_H

#include "utils/ast/ast_command.h"
#include "utils/ast/ast_if.h"
#include "utils/ast/ast_list.h"
#include "utils/ast/ast_void.h"

enum ast_type
{
    AST_END,
    AST_LIST,
    AST_IF,
    AST_CMD
};

struct ast
{
    enum ast_type type;

    /**
     * Data associated with this AST node. It can be one of the following:
     * - NULL (AST_END)
     * - struct ast_if* (AST_IF)
     * - struct ast_cmd* (AST_CMD)
     */
    void *data;
};

/* @brief: returns an ast* with corresponding data and type.
 *
 * @note: this function should only be called by ast_create_[TYPE] functions.
 */
struct ast *ast_create(enum ast_type type, void *data);

/* @brief: frees the given ast. If ast is NULL, does nothing.
 *
 */
void ast_free(struct ast *node)

#endif /* ! AST_H */