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-rw-r--r--src/arg_util.rs52
1 files changed, 52 insertions, 0 deletions
diff --git a/src/arg_util.rs b/src/arg_util.rs
index 317d9e3..06a6ee6 100644
--- a/src/arg_util.rs
+++ b/src/arg_util.rs
@@ -25,6 +25,58 @@ macro_rules! count {
}
macro_rules! Command {
+ ( $name:ident, [ $( $var:ident($inner:ident) => ($str:expr, $exec:expr), ) *] ) => {
+ #[derive(Debug, PartialEq, structopt::StructOpt)]
+ pub enum $name {
+ $(
+ $var($inner),
+ )*
+ }
+
+ 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 = &'static str;
+
+ fn from_str(s: &str) -> ::std::result::Result<Self, Self::Err> {
+ match s {
+ $(
+ $str => Ok($name::$var(::std::default::Default::default())),
+ )*
+ _ => Err("[error]"),
+ }
+ }
+ }
+
+ #[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, $exec:expr), ) *] ) => {
#[derive(Debug, PartialEq)]
pub enum $name {