Merge branch 'da/mergetool-xxdiff-hotkey' into maint

diff --git a/Documentation/technical/api-parse-options.txt b/Documentation/technical/api-parse-options.txt
index 5f0757dcc965fc89b96f18e31732390b1afeb84e..27bd701c0d6862f38c700fbfc02c24b135bd6c0e 100644 (file)
--- a/Documentation/technical/api-parse-options.txt
+++ b/Documentation/technical/api-parse-options.txt
@@ -144,8 +144,12 @@ There are some macros to easily define options:
 
 `OPT_COUNTUP(short, long, &int_var, description)`::
        Introduce a count-up option.
-       `int_var` is incremented on each use of `--option`, and
-       reset to zero with `--no-option`.
+       Each use of `--option` increments `int_var`, starting from zero
+       (even if initially negative), and `--no-option` resets it to
+       zero. To determine if `--option` or `--no-option` was encountered at
+       all, initialize `int_var` to a negative value, and if it is still
+       negative after parse_options(), then neither `--option` nor
+       `--no-option` was seen.
 
 `OPT_BIT(short, long, &int_var, description, mask)`::
        Introduce a boolean option.
@@ -231,6 +235,13 @@ There are some macros to easily define options:
        pass the command-line option, which can be specified multiple times,
        to another command.
 
+`OPT_CMDMODE(short, long, &int_var, description, enum_val)`::
+       Define an "operation mode" option, only one of which in the same
+       group of "operating mode" options that share the same `int_var`
+       can be given by the user. `enum_val` is set to `int_var` when the
+       option is used, but an error is reported if other "operating mode"
+       option has already set its value to the same `int_var`.
+
 
 The last element of the array must be `OPT_END()`.