use std::ffi::{OsStr, OsString};
use std::fmt::{Display, Formatter, Result};
use std::mem;
use std::rc::Rc;
use std::result::Result as StdResult;
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 {
" "
};
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 {
' '
};
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 super::OptBuilder;
use args::settings::ArgSettings;
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>");
}
}