clap/src/app/macros.rs

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macro_rules! remove_overriden {
(@remove $_self:ident, $v:ident, $a:ident.$ov:ident) => {
if let Some(ref ora) = $a.$ov {
vec_remove_all!($_self.$v, ora);
}
};
(@arg $_self:ident, $arg:ident) => {
remove_overriden!(@remove $_self, required, $arg.requires);
remove_overriden!(@remove $_self, blacklist, $arg.blacklist);
remove_overriden!(@remove $_self, overrides, $arg.overrides);
};
($_self:ident, $name:expr) => {
debugln!("macro=remove_overriden!;");
if let Some(ref o) = $_self.opts.iter().filter(|o| o.name == *$name).next() {
remove_overriden!(@arg $_self, o);
} else if let Some(ref f) = $_self.flags.iter().filter(|f| f.name == *$name).next() {
remove_overriden!(@arg $_self, f);
} else if let Some(p) = $_self.positionals.values().filter(|p| p.name == *$name).next() {
remove_overriden!(@arg $_self, p);
}
};
}
macro_rules! arg_post_processing {
($me:ident, $arg:ident, $matcher:ident) => {
debugln!("macro=arg_post_processing!;");
// Handle POSIX overrides
debug!("Is '{}' in overrides...", $arg.to_string());
if $me.overrides.contains(&$arg.name()) {
if let Some(ref name) = $me.overriden_from($arg.name(), $matcher) {
sdebugln!("Yes by {}", name);
$matcher.remove(name);
remove_overriden!($me, name);
}
} else { sdebugln!("No"); }
// Add overrides
debug!("Does '{}' have overrides...", $arg.to_string());
if let Some(or) = $arg.overrides() {
sdebugln!("Yes");
$matcher.remove_all(or);
for pa in or { remove_overriden!($me, pa); }
$me.overrides.extend(or);
vec_remove_all!($me.required, or);
} else { sdebugln!("No"); }
// Handle conflicts
debug!("Does '{}' have conflicts...", $arg.to_string());
if let Some(bl) = $arg.blacklist() {
sdebugln!("Yes");
$me.blacklist.extend(bl);
vec_remove_all!($me.overrides, bl);
vec_remove_all!($me.required, bl);
} else { sdebugln!("No"); }
// Add all required args which aren't already found in matcher to the master
// list
debug!("Does '{}' have requirements...", $arg.to_string());
if let Some(reqs) = $arg.requires() {
for n in reqs {
if $matcher.contains(&n) {
sdebugln!("\tYes '{}' but it's already met", n);
continue;
} else { sdebugln!("\tYes '{}'", n); }
$me.required.push(n);
}
} else { sdebugln!("No"); }
_handle_group_reqs!($me, $arg);
};
}
macro_rules! _handle_group_reqs{
($me:ident, $arg:ident) => ({
use args::AnyArg;
debugln!("macro=_handle_group_reqs!;");
for grp in $me.groups.values() {
let mut found = false;
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for name in &grp.args {
if name == &$arg.name() {
vec_remove!($me.required, name);
if let Some(ref reqs) = grp.requires {
$me.required.extend(reqs);
}
if let Some(ref bl) = grp.conflicts {
$me.blacklist.extend(bl);
}
found = true; // What if arg is in more than one group with different reqs?
break;
}
}
if found {
vec_remove_all!($me.required, &grp.args);
$me.blacklist.extend(&grp.args);
vec_remove!($me.blacklist, &$arg.name());
}
}
})
}
macro_rules! validate_multiples {
($_self:ident, $a:ident, $m:ident) => {
debugln!("macro=validate_multiples!;");
if $m.contains(&$a.name) && !$a.settings.is_set(ArgSettings::Multiple) {
// Not the first time, and we don't allow multiples
return Err(Error::unexpected_multiple_usage($a, &*$_self.create_current_usage($m)))
}
};
}
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macro_rules! parse_positional {
(
$_self:ident,
$p:ident,
$arg_os:ident,
$pos_only:ident,
$pos_counter:ident,
$matcher:ident
) => {
debugln!("macro=parse_positional!;");
validate_multiples!($_self, $p, $matcher);
if let Err(e) = $_self.add_val_to_arg($p, &$arg_os, $matcher) {
return Err(e);
}
if !$pos_only &&
($_self.settings.is_set(AppSettings::TrailingVarArg) &&
$pos_counter == $_self.positionals.len()) {
$pos_only = true;
}
$matcher.inc_occurrence_of($p.name);
let _ = $_self.groups_for_arg($p.name)
.and_then(|vec| Some($matcher.inc_occurrences_of(&*vec)));
arg_post_processing!($_self, $p, $matcher);
// Only increment the positional counter if it doesn't allow multiples
if !$p.settings.is_set(ArgSettings::Multiple) {
$pos_counter += 1;
}
};
}