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Merge branch 'pb/opt-cmdmode-doc' into maint
Minor API documentation update. * pb/opt-cmdmode-doc: api-parse-options.txt: document OPT_CMDMODE()
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@ -231,6 +231,13 @@ There are some macros to easily define options:
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pass the command-line option, which can be specified multiple times,
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to another command.
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`OPT_CMDMODE(short, long, &int_var, description, enum_val)`::
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Define an "operation mode" option, only one of which in the same
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group of "operating mode" options that share the same `int_var`
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can be given by the user. `enum_val` is set to `int_var` when the
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option is used, but an error is reported if other "operating mode"
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option has already set its value to the same `int_var`.
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The last element of the array must be `OPT_END()`.
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