Function parse_func_arg

src/cypher/cypher.c:1550–1569

Parse one function argument: a string/number literal or a var[.prop]. */

/* Parse one function argument: a string/number literal or a var[.prop]. */
static int parse_func_arg(parser_t *p, cbm_func_arg_t *arg) {
    memset(arg, 0, sizeof(*arg));
    if (check(p, TOK_STRING) || check(p, TOK_NUMBER)) {
        arg->literal = heap_strdup(peek(p)->text);
        advance(p);
        return 0;
    }
    const cbm_token_t *var = expect(p, TOK_IDENT);
    if (!var) {
        return CBM_NOT_FOUND;
    }
    arg->variable = heap_strdup(var->text);
    if (match(p, TOK_DOT)) {
        const cbm_token_t *prop = expect(p, TOK_IDENT);
        if (prop) {
            arg->property = heap_strdup(prop->text);
        }
    }
    return 0;
}

/* Parse a multi-argument scalar call: coalesce(a, b, ...), substring(s, i[, n]),
 * replace(s, from, to), left(s, n), right(s, n). */