more options formatting

src/arg/mod.rs

@@ -13,42 +13,62 @@ use std::fmt;
 
 #[inline] fn options() -> impl Iterator<Item = impl fmt::Display>
 {
-    struct Opt(&'static [&'static str], Option<&'static str>, &'static str, usize, bool);
+    struct Opt(&'static [&'static str], Option<&'static str>, &'static str, usize, Option<&'static str>, Option<&'static [&'static str]>);
 
     impl Opt
     {
-	const fn with_def(self, vl: bool) -> Self
+	const fn with_def(self, vl: &'static str) -> Self
 	{
-	    Self(self.0, self.1, self.2, self.3, vl)
+	    Self(self.0, self.1, self.2, self.3, Some(vl), self.5)
+	}
+	const fn with_slice(self, vl: &'static [&'static str]) -> Self
+	{
+	    Self(self.0, self.1, self.2, self.3, self.4, Some(vl))	    
 	}
     }
 
+    /// Macro for printing the options
+    ///
+    /// # Usage
+    /// Any combination of the following:
+    /// ```
+    /// opt!("--long", "--other"; "Description"); // --long, --other:	Description
+    /// opt!("--long", "--other"; * 2 "Description"); // --long, --other:		Description
+    /// opt!("--long", "--other" => "value name"; "Description"); // --long, --other <value name>:	Description
+    /// opt!("--long"; "Description", ""); // --long, --other:	Description (default)
+    /// opt!("--long"; "Description", "Value"); // --long, --other:	Description (default: `Value`)
+    /// opt!("--long"; "Description", ["OTHER", "OTHER 2"], "value"); // --long, --other:	Description (see `OTHER`, `OTHER 2`) (default: `value`)
+    /// ```
     macro_rules! opt {
-	($($name:literal),* => $num:literal; $desc:literal $(, $def:literal)?) => {
+	($($name:literal),* => $num:literal; $desc:literal $(, [$($see:literal),*])? $(, $def:literal)?) => {
 	    {
-		let o = Opt(&[$($name),*], Some($num), $desc, 1, false);
+		let o = Opt(&[$($name),*], Some($num), $desc, 1, None, None);
 		$(let o = o.with_def($def);)?
+		    $(let o = o.with_slice(&[$($see),*]);)?
 		    o
 	    }
 	};
-	($($name:literal),* => $num:literal; * $tabs:literal $desc:literal $(, $def:literal)?) => {
+	($($name:literal),* => $num:literal; * $tabs:literal $desc:literal $(, [$($see:literal),*])? $(, $def:literal)?) => {
 	    {
-		let o = Opt(&[$($name),*], Some($num), $desc, $tabs, false);
+		let o = Opt(&[$($name),*], Some($num), $desc, $tabs, None, None);
 		$(let o = o.with_def($def);)?
+		    $(let o = o.with_slice(&[$($see),*]);)?
 		    o
 	    }
 	};
-	($($name:literal),*; $desc:literal $(, $def:literal)?) => {
+	($($name:literal),*; $desc:literal $(, [$($see:literal),*])? $(, $def:literal)?) => {
 	    {
-		let o = Opt(&[$($name),*], None, $desc, 1, false);
+		let o = Opt(&[$($name),*], None, $desc, 1, None, None);
 		$(let o = o.with_def($def);)?
+		    $(let o = o.with_slice(&[$($see),*]);)?
 		    o
 	    }
 	};
-	($($name:literal),*; * $tabs:literal  $desc:literal  $(, $def:literal)?) => {
+	($($name:literal),*; * $tabs:literal  $desc:literal $(, [$($see:literal),*])? $(, $def:literal)?) => {
 	    {
-		let o = Opt(&[$($name),*], None, $desc, $tabs, false);
+		let o = Opt(&[$($name),*], None, $desc, $tabs, None, None);
 		$(let o = o.with_def($def);)?
+		    $(let o = o.with_slice(&[$($see),*]);)?
 		    o
 	    }
 	};
@@ -59,7 +79,8 @@ use std::fmt;
 	{
 	    write!(f, " {}", self.0.iter().join(", "))?;
 	    if let Some(mx) = self.1 {
-		write!(f, "  {}", mx)?;
+		use recolored::Colorize;
+		write!(f, "  <{}>", mx.italic())?;
 	    }
 	    write!(f, ":")?;
 	    for ch in std::iter::repeat('\t').take(self.3)
@@ -69,18 +90,40 @@ use std::fmt;
 	    }
 	    
 	    write!(f,"{}", self.2)?;
-	    if self.4 {
-		use recolored::Colorize;
-		write!(f, " ({})", "default".bold().bright_red())?;
+	    {
+	    	use recolored::Colorize;
+
+		match self.5 {
+		    Some(&[]) => (),
+		    Some(strings) => {
+			write!(f, " (see {})", strings.iter().map(|x| iter!["`".clear(), x.underline(), "`".clear()]).flat_join(", "))?;
+		    }
+		    _ => (),
+		}
+		
+		match self.4 {
+		    Some("") => {
+			write!(f, " ({})", "default".bold().bright_red())?;
+		    },
+		    Some(string) => {
+			write!(f, " ({}: `{}`)", "default".bold().bright_red(), string.bright_blue())?;
+		    },
+		    None => (),
+		}
 	    }
 	    Ok(())
 	}
     }
 
     iter![
-	opt!("--limit", "-l" => "<max children>"; "Limit the number of child processes running at once."),
-	opt!("--auto-limit", "-m"; * 2 "Limit to max number of CPUs + 1", true),
-	opt!("--unlimit", "-U"; * 3 "No limit to number of processes spawned at once")
+	opt!("--limit", "-l" => "max children"; "Limit the number of child processes running at once."),
+	opt!("--auto-limit", "-m"; * 2 "Limit to max number of CPUs + 1", ""),
+	opt!("--unlimit", "-U"; * 3 "No limit to number of processes spawned at once"),
+	opt!("--completion", "-c" => "action"; "Set the default action on completion",  ["ACTIONS", "COMPLETION"], "ignore"),
+	opt!("--silent", "-s"; * 3 "Output no messages other than that of child processes"),
+	opt!("--stdout" => "where"; * 2 "Set default redirect option for childrens' `stdout`", ["ACTIONS"] ,"inherit"),
+	opt!("--stderr" => "where"; * 2 "Set default redirect option for childrens' `stderr`", ["ACTIONS"], "inherit"),
+	opt!("--stdin" => "where"; * 2 "Set default redirect option for childrens' `stdin`", ["ACTIONS"], "close")
     ]
 }
 

src/ext.rs

@@ -1,6 +1,11 @@
 use super::*;
 use std::fmt;
 
+pub trait FlatJoinStrsExt: Sized
+{
+    /// Join an iterator of iterators `str` with a seperator
+    fn flat_join(self, with: &str) -> String;
+}
 pub trait JoinStrsExt: Sized
 {
     /// Join an iterator of `str` with a seperator
@@ -28,3 +33,25 @@ where I: IntoIterator<Item=T>,
 	output
     }
 }
+
+impl<I, I2, T> FlatJoinStrsExt for I
+where I: IntoIterator<Item = I2>,
+      I2: IntoIterator<Item = T>,
+      T: fmt::Display
+{
+    fn flat_join(self, with: &str) -> String
+    {
+	let mut output = String::new();
+	let mut first=true;
+	for string in self.into_iter()
+	{
+	    if !first {
+		output.push_str(with);
+	    }
+	    let string: String = string.into_iter().map(|x| x.to_string()).collect();
+	    output.push_str(&string[..]);
+	    first=false;
+	}
+	output
+    }
+}