1 files changed, 244 insertions, 0 deletions
diff --git a/clap/src/args/arg_builder/option.rs b/clap/src/args/arg_builder/option.rs
new file mode 100644
index 0000000..4bb147a
--- /dev/null
+++ b/clap/src/args/arg_builder/option.rs
@@ -0,0 +1,244 @@
+// Std
+use std::fmt::{Display, Formatter, Result};
+use std::rc::Rc;
+use std::result::Result as StdResult;
+use std::ffi::{OsStr, OsString};
+use std::mem;
+
+// Internal
+use args::{AnyArg, Arg, ArgSettings, Base, DispOrder, Switched, Valued};
+use map::{self, VecMap};
+use INTERNAL_ERROR_MSG;
+
+#[allow(missing_debug_implementations)]
+#[doc(hidden)]
+#[derive(Default, Clone)]
+pub struct OptBuilder<'n, 'e>
+where
+    'n: 'e,
+{
+    pub b: Base<'n, 'e>,
+    pub s: Switched<'e>,
+    pub v: Valued<'n, 'e>,
+}
+
+impl<'n, 'e> OptBuilder<'n, 'e> {
+    pub fn new(name: &'n str) -> Self {
+        OptBuilder {
+            b: Base::new(name),
+            ..Default::default()
+        }
+    }
+}
+
+impl<'n, 'e, 'z> From<&'z Arg<'n, 'e>> for OptBuilder<'n, 'e> {
+    fn from(a: &'z Arg<'n, 'e>) -> Self {
+        OptBuilder {
+            b: Base::from(a),
+            s: Switched::from(a),
+            v: Valued::from(a),
+        }
+    }
+}
+
+impl<'n, 'e> From<Arg<'n, 'e>> for OptBuilder<'n, 'e> {
+    fn from(mut a: Arg<'n, 'e>) -> Self {
+        a.v.fill_in();
+        OptBuilder {
+            b: mem::replace(&mut a.b, Base::default()),
+            s: mem::replace(&mut a.s, Switched::default()),
+            v: mem::replace(&mut a.v, Valued::default()),
+        }
+    }
+}
+
+impl<'n, 'e> Display for OptBuilder<'n, 'e> {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        debugln!("OptBuilder::fmt:{}", self.b.name);
+        let sep = if self.b.is_set(ArgSettings::RequireEquals) {
+            "="
+        } else {
+            " "
+        };
+        // Write the name such --long or -l
+        if let Some(l) = self.s.long {
+            write!(f, "--{}{}", l, sep)?;
+        } else {
+            write!(f, "-{}{}", self.s.short.unwrap(), sep)?;
+        }
+        let delim = if self.is_set(ArgSettings::RequireDelimiter) {
+            self.v.val_delim.expect(INTERNAL_ERROR_MSG)
+        } else {
+            ' '
+        };
+
+        // Write the values such as <name1> <name2>
+        if let Some(ref vec) = self.v.val_names {
+            let mut it = vec.iter().peekable();
+            while let Some((_, val)) = it.next() {
+                write!(f, "<{}>", val)?;
+                if it.peek().is_some() {
+                    write!(f, "{}", delim)?;
+                }
+            }
+            let num = vec.len();
+            if self.is_set(ArgSettings::Multiple) && num == 1 {
+                write!(f, "...")?;
+            }
+        } else if let Some(num) = self.v.num_vals {
+            let mut it = (0..num).peekable();
+            while let Some(_) = it.next() {
+                write!(f, "<{}>", self.b.name)?;
+                if it.peek().is_some() {
+                    write!(f, "{}", delim)?;
+                }
+            }
+            if self.is_set(ArgSettings::Multiple) && num == 1 {
+                write!(f, "...")?;
+            }
+        } else {
+            write!(
+                f,
+                "<{}>{}",
+                self.b.name,
+                if self.is_set(ArgSettings::Multiple) {
+                    "..."
+                } else {
+                    ""
+                }
+            )?;
+        }
+
+        Ok(())
+    }
+}
+
+impl<'n, 'e> AnyArg<'n, 'e> for OptBuilder<'n, 'e> {
+    fn name(&self) -> &'n str { self.b.name }
+    fn overrides(&self) -> Option<&[&'e str]> { self.b.overrides.as_ref().map(|o| &o[..]) }
+    fn requires(&self) -> Option<&[(Option<&'e str>, &'n str)]> {
+        self.b.requires.as_ref().map(|o| &o[..])
+    }
+    fn blacklist(&self) -> Option<&[&'e str]> { self.b.blacklist.as_ref().map(|o| &o[..]) }
+    fn required_unless(&self) -> Option<&[&'e str]> { self.b.r_unless.as_ref().map(|o| &o[..]) }
+    fn val_names(&self) -> Option<&VecMap<&'e str>> { self.v.val_names.as_ref() }
+    fn is_set(&self, s: ArgSettings) -> bool { self.b.settings.is_set(s) }
+    fn has_switch(&self) -> bool { true }
+    fn set(&mut self, s: ArgSettings) { self.b.settings.set(s) }
+    fn max_vals(&self) -> Option<u64> { self.v.max_vals }
+    fn val_terminator(&self) -> Option<&'e str> { self.v.terminator }
+    fn num_vals(&self) -> Option<u64> { self.v.num_vals }
+    fn possible_vals(&self) -> Option<&[&'e str]> { self.v.possible_vals.as_ref().map(|o| &o[..]) }
+    fn validator(&self) -> Option<&Rc<Fn(String) -> StdResult<(), String>>> {
+        self.v.validator.as_ref()
+    }
+    fn validator_os(&self) -> Option<&Rc<Fn(&OsStr) -> StdResult<(), OsString>>> {
+        self.v.validator_os.as_ref()
+    }
+    fn min_vals(&self) -> Option<u64> { self.v.min_vals }
+    fn short(&self) -> Option<char> { self.s.short }
+    fn long(&self) -> Option<&'e str> { self.s.long }
+    fn val_delim(&self) -> Option<char> { self.v.val_delim }
+    fn takes_value(&self) -> bool { true }
+    fn help(&self) -> Option<&'e str> { self.b.help }
+    fn long_help(&self) -> Option<&'e str> { self.b.long_help }
+    fn default_val(&self) -> Option<&'e OsStr> { self.v.default_val }
+    fn default_vals_ifs(&self) -> Option<map::Values<(&'n str, Option<&'e OsStr>, &'e OsStr)>> {
+        self.v.default_vals_ifs.as_ref().map(|vm| vm.values())
+    }
+    fn env<'s>(&'s self) -> Option<(&'n OsStr, Option<&'s OsString>)> {
+        self.v
+            .env
+            .as_ref()
+            .map(|&(key, ref value)| (key, value.as_ref()))
+    }
+    fn longest_filter(&self) -> bool { true }
+    fn aliases(&self) -> Option<Vec<&'e str>> {
+        if let Some(ref aliases) = self.s.aliases {
+            let vis_aliases: Vec<_> = aliases
+                .iter()
+                .filter_map(|&(n, v)| if v { Some(n) } else { None })
+                .collect();
+            if vis_aliases.is_empty() {
+                None
+            } else {
+                Some(vis_aliases)
+            }
+        } else {
+            None
+        }
+    }
+}
+
+impl<'n, 'e> DispOrder for OptBuilder<'n, 'e> {
+    fn disp_ord(&self) -> usize { self.s.disp_ord }
+}
+
+impl<'n, 'e> PartialEq for OptBuilder<'n, 'e> {
+    fn eq(&self, other: &OptBuilder<'n, 'e>) -> bool { self.b == other.b }
+}
+
+#[cfg(test)]
+mod test {
+    use args::settings::ArgSettings;
+    use super::OptBuilder;
+    use map::VecMap;
+
+    #[test]
+    fn optbuilder_display1() {
+        let mut o = OptBuilder::new("opt");
+        o.s.long = Some("option");
+        o.b.settings.set(ArgSettings::Multiple);
+
+        assert_eq!(&*format!("{}", o), "--option <opt>...");
+    }
+
+    #[test]
+    fn optbuilder_display2() {
+        let mut v_names = VecMap::new();
+        v_names.insert(0, "file");
+        v_names.insert(1, "name");
+
+        let mut o2 = OptBuilder::new("opt");
+        o2.s.short = Some('o');
+        o2.v.val_names = Some(v_names);
+
+        assert_eq!(&*format!("{}", o2), "-o <file> <name>");
+    }
+
+    #[test]
+    fn optbuilder_display3() {
+        let mut v_names = VecMap::new();
+        v_names.insert(0, "file");
+        v_names.insert(1, "name");
+
+        let mut o2 = OptBuilder::new("opt");
+        o2.s.short = Some('o');
+        o2.v.val_names = Some(v_names);
+        o2.b.settings.set(ArgSettings::Multiple);
+
+        assert_eq!(&*format!("{}", o2), "-o <file> <name>");
+    }
+
+    #[test]
+    fn optbuilder_display_single_alias() {
+        let mut o = OptBuilder::new("opt");
+        o.s.long = Some("option");
+        o.s.aliases = Some(vec![("als", true)]);
+
+        assert_eq!(&*format!("{}", o), "--option <opt>");
+    }
+
+    #[test]
+    fn optbuilder_display_multiple_aliases() {
+        let mut o = OptBuilder::new("opt");
+        o.s.long = Some("option");
+        o.s.aliases = Some(vec![
+            ("als_not_visible", false),
+            ("als2", true),
+            ("als3", true),
+            ("als4", true),
+        ]);
+        assert_eq!(&*format!("{}", o), "--option <opt>");
+    }
+}