feat(clap_app!): Support ("some app name") syntax for defining app …

…names

Used for setting names that aren't Rust idents.

Fixes #759

src/macros.rs

@@ -535,6 +535,10 @@ macro_rules! clap_app {
         clap_app!{ @app ($crate::SubCommand::with_name(stringify!($name))) $($tail)* }
     };
 // Start the magic
+    (($name:expr) => $($tail:tt)*) => {{
+        clap_app!{ @app ($crate::App::new($name)) $($tail)*}
+    }};
+
     ($name:ident => $($tail:tt)*) => {{
         clap_app!{ @app ($crate::App::new(stringify!($name))) $($tail)*}
     }};

tests/macros.rs

@@ -33,3 +33,43 @@ fn basic() {
             (@arg scpositional: index(1) "tests positionals"))
     );
 }
+
+#[test]
+fn quoted_app_name() {
+    let app = clap_app!(("app name with spaces-and-hyphens") =>
+        (version: "0.1")
+        (about: "tests clap library")
+        (author: "Kevin K. <kbknapp@gmail.com>")
+        (@arg opt: -o --option +takes_value ... "tests options")
+        (@arg positional: index(1) "tests positionals")
+        (@arg flag: -f --flag ... +global "tests flags")
+        (@arg flag2: -F conflicts_with[flag] requires[option2]
+            "tests flags with exclusions")
+        (@arg option2: --long_option_2 conflicts_with[option] requires[positional2]
+            "tests long options with exclusions")
+        (@arg positional2: index(2) "tests positionals with exclusions")
+        (@arg option3: -O --Option +takes_value possible_value[fast slow]
+            "tests options with specific value sets")
+        (@arg positional3: index(3) ... possible_value[vi emacs]
+            "tests positionals with specific values")
+        (@arg multvals: --multvals +takes_value value_name[one two]
+            "Tests mutliple values, not mult occs")
+        (@arg multvalsmo: --multvalsmo ... +takes_value value_name[one two]
+            "Tests mutliple values, not mult occs")
+        (@arg minvals: --minvals2 min_values(1) ... +takes_value "Tests 2 min vals")
+        (@arg maxvals: --maxvals3 ... +takes_value max_values(3) "Tests 3 max vals")
+        (@subcommand subcmd =>
+            (about: "tests subcommands")
+            (version: "0.1")
+            (author: "Kevin K. <kbknapp@gmail.com>")
+            (@arg scoption: -o --option ... +takes_value "tests options")
+            (@arg scpositional: index(1) "tests positionals"))
+    );
+
+    assert_eq!(app.p.meta.name, "app name with spaces-and-hyphens");
+
+    let mut help_text = vec![];
+    app.write_help(&mut help_text).expect("Could not write help text.");
+    let help_text = String::from_utf8(help_text).expect("Help text is not valid utf-8");
+    assert!(help_text.starts_with("app name with spaces-and-hyphens 0.1\n"));
+}