Function yaml_parser_fetch_key

external/libyaml/src/scanner.c:1648–1695

 */

static int
yaml_parser_fetch_key(yaml_parser_t *parser)
{
    yaml_mark_t start_mark, end_mark;
    yaml_token_t token;

    /* In the block context, additional checks are required. */

    if (!parser->flow_level)
    {
        /* Check if we are allowed to start a new key (not necessary simple). */

        if (!parser->simple_key_allowed) {
            return yaml_parser_set_scanner_error(parser, NULL, parser->mark,
                    "mapping keys are not allowed in this context");
        }

        /* Add the BLOCK-MAPPING-START token if needed. */

        if (!yaml_parser_roll_indent(parser, parser->mark.column, -1,
                    YAML_BLOCK_MAPPING_START_TOKEN, parser->mark))
            return 0;
    }

    /* Reset any potential simple keys on the current flow level. */

    if (!yaml_parser_remove_simple_key(parser))
        return 0;

    /* Simple keys are allowed after '?' in the block context. */

    parser->simple_key_allowed = (!parser->flow_level);

    /* Consume the token. */

    start_mark = parser->mark;
    SKIP(parser);
    end_mark = parser->mark;

    /* Create the KEY token and append it to the queue. */

    TOKEN_INIT(token, YAML_KEY_TOKEN, start_mark, end_mark);

    if (!ENQUEUE(parser, parser->tokens, token))
        return 0;

    return 1;
}

/*
 * Produce the VALUE token.