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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:11:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:13:23 +0000
commit20431706a863f92cb37dc512fef6e48d192aaf2c (patch)
tree2867f13f5fd5437ba628c67d7f87309ccadcd286 /vendor/clap-3.2.20/examples/derive_ref/custom-bool.md
parentReleasing progress-linux version 1.65.0+dfsg1-2~progress7.99u1. (diff)
downloadrustc-20431706a863f92cb37dc512fef6e48d192aaf2c.tar.xz
rustc-20431706a863f92cb37dc512fef6e48d192aaf2c.zip
Merging upstream version 1.66.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+*Jump to [source](custom-bool.rs)*
+
+Example of overriding the magic `bool` behavior
+
+```console
+$ custom-bool --help
+clap [..]
+A simple to use, efficient, and full-featured Command Line Argument Parser
+
+USAGE:
+ custom-bool[EXE] [OPTIONS] --foo <FOO> <BOOM>
+
+ARGS:
+ <BOOM> [possible values: true, false]
+
+OPTIONS:
+ --bar <BAR> [default: false]
+ --foo <FOO> [possible values: true, false]
+ -h, --help Print help information
+ -V, --version Print version information
+
+$ custom-bool
+? failed
+error: The following required arguments were not provided:
+ --foo <FOO>
+ <BOOM>
+
+USAGE:
+ custom-bool[EXE] [OPTIONS] --foo <FOO> <BOOM>
+
+For more information try --help
+
+$ custom-bool --foo true false
+[examples/derive_ref/custom-bool.rs:31] opt = Opt {
+ foo: true,
+ bar: false,
+ boom: false,
+}
+
+$ custom-bool --foo true --bar true false
+[examples/derive_ref/custom-bool.rs:31] opt = Opt {
+ foo: true,
+ bar: true,
+ boom: false,
+}
+
+```