From 65b3f667532685f854c699ddd264d326599cf7e5 Mon Sep 17 00:00:00 2001
From: Hernan Grecco <hernan.grecco@gmail.com>
Date: Fri, 1 Apr 2016 02:07:44 -0300
Subject: [PATCH] imp(srs/args): Added longest_filter to AnyArg trait

This function allows providing an extra filter to remove elements when finding
the longest element.
---
 src/app/mod.rs                     | 1 +
 src/args/any_arg.rs                | 1 +
 src/args/arg_builder/flag.rs       | 1 +
 src/args/arg_builder/option.rs     | 1 +
 src/args/arg_builder/positional.rs | 1 +
 5 files changed, 5 insertions(+)

diff --git a/src/app/mod.rs b/src/app/mod.rs
index 17ff3d5f..04170c8c 100644
--- a/src/app/mod.rs
+++ b/src/app/mod.rs
@@ -936,6 +936,7 @@ impl<'n, 'e> AnyArg<'n, 'e> for App<'n, 'e> {
     fn takes_value(&self) -> bool { true }
     fn help(&self) -> Option<&'e str> { self.p.meta.about }
     fn default_val(&self) -> Option<&'n str> { None }
+    fn longest_filter(&self) -> bool { true }
 }
 
 impl<'n, 'e> fmt::Display for App<'n, 'e> {
diff --git a/src/args/any_arg.rs b/src/args/any_arg.rs
index a4fc5ec7..16f3d001 100644
--- a/src/args/any_arg.rs
+++ b/src/args/any_arg.rs
@@ -25,6 +25,7 @@ pub trait AnyArg<'n, 'e> {
     fn val_names(&self) -> Option<&VecMap<&'e str>>;
     fn help(&self) -> Option<&'e str>;
     fn default_val(&self) -> Option<&'n str>;
+    fn longest_filter(&self) -> bool;
 }
 
 pub trait DispOrder {
diff --git a/src/args/arg_builder/flag.rs b/src/args/arg_builder/flag.rs
index 4f1d201e..0471246a 100644
--- a/src/args/arg_builder/flag.rs
+++ b/src/args/arg_builder/flag.rs
@@ -129,6 +129,7 @@ impl<'n, 'e> AnyArg<'n, 'e> for FlagBuilder<'n, 'e> {
     fn val_delim(&self) -> Option<char> { None }
     fn help(&self) -> Option<&'e str> { self.help }
     fn default_val(&self) -> Option<&'n str> { None }
+    fn longest_filter(&self) -> bool { self.long.is_some() }
 }
 
 impl<'n, 'e> DispOrder for FlagBuilder<'n, 'e> {
diff --git a/src/args/arg_builder/option.rs b/src/args/arg_builder/option.rs
index f150802a..01c05f06 100644
--- a/src/args/arg_builder/option.rs
+++ b/src/args/arg_builder/option.rs
@@ -193,6 +193,7 @@ impl<'n, 'e> AnyArg<'n, 'e> for OptBuilder<'n, 'e> {
     fn takes_value(&self) -> bool { true }
     fn help(&self) -> Option<&'e str> { self.help }
     fn default_val(&self) -> Option<&'n str> { self.default_val }
+    fn longest_filter(&self) -> bool { true }
 }
 
 impl<'n, 'e> DispOrder for OptBuilder<'n, 'e> {
diff --git a/src/args/arg_builder/positional.rs b/src/args/arg_builder/positional.rs
index 81fe46ca..c08980f2 100644
--- a/src/args/arg_builder/positional.rs
+++ b/src/args/arg_builder/positional.rs
@@ -180,6 +180,7 @@ impl<'n, 'e> AnyArg<'n, 'e> for PosBuilder<'n, 'e> {
     fn takes_value(&self) -> bool { true }
     fn help(&self) -> Option<&'e str> { self.help }
     fn default_val(&self) -> Option<&'n str> { self.default_val }
+    fn longest_filter(&self) -> bool { true }
 }
 
 impl<'n, 'e> DispOrder for PosBuilder<'n, 'e> {