42sh/src/parser/parser.c

#include "parser.h"

#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "lexer/lexer.h"
#include "utils/lists/lists.h"
#include "parser/parsing_utils.h"

// === Static functions
// ...

// === Functions

struct ast *get_ast()
{
    // struct list *result_list = NULL;
    // struct ast *current_node = NULL;

    struct token *token = PEEK_TOKEN();

    if (token->type == TOKEN_EOF)
    {
        token = pop_token();
        // TODO
        // return ast END.
    }
    else if (token->type == TOKEN_NEWLINE)
    {
        token = pop_token();
        // TODO
        // return ast EMPTY.
    }
    else // TOKEN WORD
    {
        // TODO
        // call parse_list
            current_node = parse_simple_command();
            result_list = list_append(result_list, current_node);
    }

    /*
    if (token == NULL)
    {
        puts("Internal error: cannot get the following token");
        puts("Hint: EOF might be missing");
        return NULL;
    }
    */

    struct ast *result = ast_create_list(result_list);
    return result;
}

// TODO
struct ast *get_ast_str(char *command)
{
    (void)command;
    return NULL;
}