Closes #17

src/app.rs

@@ -222,6 +222,7 @@ impl App {
                 blacklist: a.blacklist,
                 help: a.help,
                 requires: a.requires,
+                occurrences: 1,
                 required: a.required,
                 values: vec![]
             });
@@ -456,6 +457,10 @@ impl App {
         if arg.contains("=") {
             let arg_vec: Vec<&str> = arg.split("=").collect();
             arg = arg_vec[0];
+            // prevents "--config= value" typo
+            if arg_vec[1].len() == 0 {
+                self.report_error(format!("Argument --{} requires a value, but none was supplied", arg), true, true);
+            }
             arg_val = Some(arg_vec[1].to_string());
         } 
 
@@ -466,7 +471,18 @@ impl App {
                         self.report_error(format!("The argument --{} is mutually exclusive with one or more other arguments", arg),
                             true, true);
                     }
-
+                    let mut done = false;
+                    if v.multiple {
+                        if let Some(ref mut o) = matches.opts.get_mut(v.name) {
+                            if arg_val.is_some() {
+                                o.occurrences += 1;
+                                o.values.push(arg_val.clone().unwrap());
+                                return None;
+                            }
+                            done = true;
+                        }
+                    }
+                    if ! done {
                         matches.opts.insert(k, OptArg{
                             name: v.name,
                             short: v.short,
@@ -474,11 +490,12 @@ impl App {
                             help: v.help,
                             required: v.required,
                             blacklist: None,
+                            occurrences: 1,
                             multiple: v.multiple,
                             requires: None,
                             values: if arg_val.is_some() { vec![arg_val.clone().unwrap()]} else {vec![]} 
                         });
-                      
+                    } 
                     match arg_val {
                         None => { return Some(v.name); },
                         _ => { return None; }
@@ -730,6 +747,7 @@ impl App {
                             if let Some(ref mut o) = matches.opts.get_mut(opt.name) {
                                 done = true;
                                 o.values.push(arg.clone());
+                                o.occurrences += 1;
                             } 
                         } 
                         if ! done {
@@ -741,6 +759,7 @@ impl App {
                                 requires: None,
                                 blacklist: None,
                                 multiple: opt.multiple,
+                                occurrences: 1,
                                 required: opt.required,
                                 values: vec![arg.clone()] 
                             });

src/args/argmatches.rs

@@ -168,13 +168,12 @@ impl ArgMatches {
         false
     }
 
-    /// Checks the number of occurrences of a flag at runtime.
+    /// Checks the number of occurrences of an option or flag at runtime. 
+    /// If an option or flag isn't present it will return `0`, if the option or flag doesn't 
+    /// allow multiple occurrences, it will return `1` no matter how many times it occurred 
+    /// (unless it wasn't prsent) at all.
     ///
-    /// This **DOES NOT** work for option or positional arguments 
-    /// (use `.value_of()` instead). If a flag isn't present it will
-    /// return `0`, if a flag doesn't allow multiple occurrences, it will
-    /// return `1` no matter how many times it occurred (unless it wasn't prsent)
-    /// at all.
+    /// *NOTE:* This _*DOES NOT*_ work for positional arguments (use `.value_of()` instead). 
     ///
     ///
     /// # Example
@@ -192,6 +191,9 @@ impl ArgMatches {
         if let Some(ref f) = self.flags.get(name) {
             return f.occurrences;
         }
+        if let Some(ref o) = self.opts.get(name) {
+            return o.occurrences;
+        }
         0
     }
 

src/args/optarg.rs

@@ -33,6 +33,8 @@ pub struct OptArg {
     pub blacklist: Option<Vec<&'static str>>,
     /// Allow multiple occurrences of an option argument such as "-c some -c other"
     pub multiple: bool,
+    /// How many occurences of this option have been found when parsing
+    pub occurrences: u8,
     /// The value provided to the argument by the user
     pub values: Vec<String>
 }