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author | Daniel Mueller <deso@posteo.net> | 2020-04-04 15:32:14 -0700 |
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committer | Daniel Mueller <deso@posteo.net> | 2020-04-04 15:32:14 -0700 |
commit | 681cc8882f7995407c33eb48730daaa901074460 (patch) | |
tree | c865f6c4a34e11af685889a09d95f3225e54a16c /nitrocli/src/arg_util.rs | |
parent | d0d9683df8398696147e7ee1fcffb2e4e957008c (diff) | |
download | nitrocli-681cc8882f7995407c33eb48730daaa901074460.tar.gz nitrocli-681cc8882f7995407c33eb48730daaa901074460.tar.bz2 |
Move nitrocli source code into repository root
Now that all vendored dependencies have been removed, this change moves
the program's source code from the nitrocli/ directory into the root of
the repository.
Diffstat (limited to 'nitrocli/src/arg_util.rs')
-rw-r--r-- | nitrocli/src/arg_util.rs | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/nitrocli/src/arg_util.rs b/nitrocli/src/arg_util.rs deleted file mode 100644 index e2e7b1d..0000000 --- a/nitrocli/src/arg_util.rs +++ /dev/null @@ -1,158 +0,0 @@ -// arg_util.rs - -// ************************************************************************* -// * Copyright (C) 2019 Daniel Mueller (deso@posteo.net) * -// * * -// * This program is free software: you can redistribute it and/or modify * -// * it under the terms of the GNU General Public License as published by * -// * the Free Software Foundation, either version 3 of the License, or * -// * (at your option) any later version. * -// * * -// * This program is distributed in the hope that it will be useful, * -// * but WITHOUT ANY WARRANTY; without even the implied warranty of * -// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * -// * GNU General Public License for more details. * -// * * -// * You should have received a copy of the GNU General Public License * -// * along with this program. If not, see <http://www.gnu.org/licenses/>. * -// ************************************************************************* - -macro_rules! count { - ($head:ident) => { 1 }; - ($head:ident, $($tail:ident),*) => { - 1 + count!($($tail),*) - } -} - -/// A macro for generating an enum with a set of simple (i.e., no -/// parameters) variants and their textual representations. -// TODO: Right now we hard code the derives we create. We may want to -// make this set configurable. -macro_rules! Enum { - ( $name:ident, [ $( $var:ident => ($str:expr, $exec:expr), ) *] ) => { - Enum! {$name, [ - $( $var => $str, )* - ]} - - #[allow(unused_qualifications)] - impl $name { - fn execute( - self, - ctx: &mut crate::args::ExecCtx<'_>, - args: ::std::vec::Vec<::std::string::String>, - ) -> crate::Result<()> { - match self { - $( - $name::$var => $exec(ctx, args), - )* - } - } - } - }; - ( $name:ident, [ $( $var:ident => $str:expr, ) *] ) => { - #[derive(Clone, Copy, Debug, PartialEq)] - pub enum $name { - $( - $var, - )* - } - - impl $name { - #[allow(unused)] - pub fn all(&self) -> [$name; count!($($var),*) ] { - $name::all_variants() - } - - pub fn all_variants() -> [$name; count!($($var),*) ] { - [ - $( - $name::$var, - )* - ] - } - } - - impl ::std::convert::AsRef<str> for $name { - fn as_ref(&self) -> &'static str { - match *self { - $( - $name::$var => $str, - )* - } - } - } - - impl ::std::fmt::Display for $name { - fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result { - write!(f, "{}", self.as_ref()) - } - } - - impl ::std::str::FromStr for $name { - type Err = (); - - fn from_str(s: &str) -> ::std::result::Result<Self, Self::Err> { - match s { - $( - $str => Ok($name::$var), - )* - _ => Err(()), - } - } - } - }; -} - -/// A macro for formatting the variants of an enum (as created by the -/// Enum!{} macro) ready to be used in a help text. The supplied `fmt` -/// needs to contain the named parameter `{variants}`, which will be -/// replaced with a generated version of the enum's variants. -macro_rules! fmt_enum { - ( $enm:ident ) => {{ - fmt_enum!($enm.all()) - }}; - ( $all:expr ) => {{ - $all - .iter() - .map(::std::convert::AsRef::as_ref) - .collect::<::std::vec::Vec<_>>() - .join("|") - }}; -} - -/// A macro for generating the help text for a command/subcommand. The -/// argument is the variable representing the command (which in turn is -/// an enum). -/// Note that the name of this variable is embedded into the help text! -macro_rules! cmd_help { - ( $cmd:ident ) => { - format!( - concat!("The ", stringify!($cmd), " to execute ({})"), - fmt_enum!($cmd) - ) - }; -} - -#[cfg(test)] -mod tests { - Enum! {Command, [ - Var1 => "var1", - Var2 => "2", - Var3 => "crazy", - ]} - - #[test] - fn all_variants() { - assert_eq!( - Command::all_variants(), - [Command::Var1, Command::Var2, Command::Var3] - ) - } - - #[test] - fn text_representations() { - assert_eq!(Command::Var1.as_ref(), "var1"); - assert_eq!(Command::Var2.as_ref(), "2"); - assert_eq!(Command::Var3.as_ref(), "crazy"); - } -} |