From 1a85b49b87af0e17a503b94df10d0b39472ad5b8 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Thu, 14 Mar 2019 04:25:04 -0700 Subject: parse-options: make OPT_ARGUMENT() more useful `OPT_ARGUMENT()` is intended to keep the specified long option in `argv` and not to do anything else. However, it would make a lot of sense for the caller to know whether this option was seen at all or not. For example, we want to teach `git difftool` to work outside of any Git worktree, but only when `--no-index` was specified. Note: nothing in Git uses OPT_ARGUMENT(). Even worse, looking through the commit history, one can easily see that nothing even ever used it, apart from the regression test. So not only do we make `OPT_ARGUMENT()` more useful, we are also about to introduce its first real user! Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- Documentation/technical/api-parse-options.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/technical/api-parse-options.txt b/Documentation/technical/api-parse-options.txt index 2b036d7838..2e2e7c10c6 100644 --- a/Documentation/technical/api-parse-options.txt +++ b/Documentation/technical/api-parse-options.txt @@ -198,8 +198,10 @@ There are some macros to easily define options: The filename will be prefixed by passing the filename along with the prefix argument of `parse_options()` to `prefix_filename()`. -`OPT_ARGUMENT(long, description)`:: +`OPT_ARGUMENT(long, &int_var, description)`:: Introduce a long-option argument that will be kept in `argv[]`. + If this option was seen, `int_var` will be set to one (except + if a `NULL` pointer was passed). `OPT_NUMBER_CALLBACK(&var, description, func_ptr)`:: Recognize numerical options like -123 and feed the integer as -- cgit v1.2.3