42sh/src/parser/parser.c


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#include "parser/parser.h"

#include <stdlib.h>

#include "ast/ast_accessors.h"
#include "lexer/token.h"
#include "parser/parser_functions.h"
#include "parser/parser_utils.h"

struct ast *parse(struct lexer *lexer, enum parser_state *state)
{
    struct token next = lexer_peek(lexer);

    if (next.type == TOKEN_EOF || next.type == TOKEN_NEWLINE)
    {
        lexer_pop(lexer);
        return NULL;
    }

    struct ast *res = parse_list(lexer, state);

    next = lexer_peek(lexer);

    if (error_check(res, state, next))
    {
        return NULL;
    }

    lexer_pop(lexer);

    if (next.type == TOKEN_EOF || next.type == TOKEN_NEWLINE)
    {
        return res;
    }
    else
    {
        cleanup(res, state);
        return NULL;
    }
}