Add argument support

Cargo.toml

@@ -4,5 +4,10 @@ version = "0.1.1"
 authors = ["Jonathan 'theJPster' Pallant <[email protected]>"]
 description = "A simple #[no_std] command line interface."
 license = "MIT OR Apache-2.0"
+edition = "2018"
 
 [dependencies]
+
+
+[dev-dependencies]
+pancurses = "0.16"

README.md

@@ -1,39 +1,179 @@
 # Menu
 
+## Introduction
+
 A simple command-line menu system in Rust. Works on embedded systems, but also
 on your command-line.
 
-```
-$ cargo run --example simple
-   Compiling menu v0.1.0 (file:///home/jonathan/Documents/programming/menu)
+**NOTE:** This crates works only in `&str` - there's no heap allocation, but
+there's also no automatic conversion to integers, boolean, etc.
+
+```console
+user@host: ~/menu $ cargo run --example simple
+   Compiling menu v0.2.0 (file:///home/user/menu)
     Finished dev [unoptimized + debuginfo] target(s) in 0.84 secs
      Running `target/debug/examples/simple`
 In enter_root()
 > help
-foo - makes a foo appear
-bar - fandoggles a bar
-sub - enter sub-menu
-help - print this help text.
+AVAILABLE ITEMS:
+        foo <a> [ <b> ] [ --verbose ] [ --level=INT ] - Makes a foo appear.
+        bar - fandoggles a bar
+        sub - enter sub-menu
+        help [ <command> ] - Show this help, or get help on a specific command.
+
+
+> help foo
+SUMMARY:
+        foo <a> [ <b> ] [ --verbose ] [ --level=INT ]
+
+PARAMETERS:
+        <a>
+                - This is the help text for 'a'
+        <b>
+                - No help text found
+        --verbose
+                - No help text found
+        --level=INT
+                - Set the level of the dangle
+
+
+DESCRIPTION:
+Makes a foo appear.
+
+This is some extensive help text.
+
+It contains multiple paragraphs and should be preceeded by the parameter list.
+
+> foo --level=3 --verbose 1 2
+In select_foo. Args = ["--level=3", "--verbose", "1", "2"]
+a = Ok(Some("1"))
+b = Ok(Some("2"))
+verbose = Ok(Some(""))
+level = Ok(Some("3"))
+no_such_arg = Err(())
+
 
 > foo
-In select_foo(): foo
+Error: Insufficient arguments given!
+
+> foo 1 2 3 3
+Error: Too many arguments given
 
 > sub
 
-sub> help
-baz - thingamobob a baz
-quux - maximum quux
-exit - leave this menu.
-help - print this help text.
+/sub> help
+AVAILABLE ITEMS:
+        baz - thingamobob a baz
+        quux - maximum quux
+        exit - Leave this menu.
+        help [ <command> ] - Show this help, or get help on a specific command.
+
 
 > exit
 
 > help
-foo - makes a foo appear
-bar - fandoggles a bar
-sub - enter sub-menu
-help - print this help text.
+AVAILABLE ITEMS:
+        foo <a> [ <b> ] [ --verbose ] [ --level=INT ] - Makes a foo appear.
+        bar - fandoggles a bar
+        sub - enter sub-menu
+        help [ <command> ] - Show this help, or get help on a specific command.
+
 
 > ^C
-$
+user@host: ~/menu $
 ```
+
+## Using
+
+See `examples/simple.rs` for a working example that runs on Linux or Windows. Here's the menu definition from that example:
+
+```rust
+const ROOT_MENU: Menu<Output> = Menu {
+    label: "root",
+    items: &[
+        &Item {
+            item_type: ItemType::Callback {
+                function: select_foo,
+                parameters: &[
+                    Parameter::Mandatory {
+                        parameter_name: "a",
+                        help: Some("This is the help text for 'a'"),
+                    },
+                    Parameter::Optional {
+                        parameter_name: "b",
+                        help: None,
+                    },
+                    Parameter::Named {
+                        parameter_name: "verbose",
+                        help: None,
+                    },
+                    Parameter::NamedValue {
+                        parameter_name: "level",
+                        argument_name: "INT",
+                        help: Some("Set the level of the dangle"),
+                    },
+                ],
+            },
+            command: "foo",
+            help: Some(
+                "Makes a foo appear.
+
+This is some extensive help text.
+
+It contains multiple paragraphs and should be preceeded by the parameter list.
+",
+            ),
+        },
+        &Item {
+            item_type: ItemType::Callback {
+                function: select_bar,
+                parameters: &[],
+            },
+            command: "bar",
+            help: Some("fandoggles a bar"),
+        },
+        &Item {
+            item_type: ItemType::Menu(&Menu {
+                label: "sub",
+                items: &[
+                    &Item {
+                        item_type: ItemType::Callback {
+                            function: select_baz,
+                            parameters: &[],
+                        },
+                        command: "baz",
+                        help: Some("thingamobob a baz"),
+                    },
+                    &Item {
+                        item_type: ItemType::Callback {
+                            function: select_quux,
+                            parameters: &[],
+                        },
+                        command: "quux",
+                        help: Some("maximum quux"),
+                    },
+                ],
+                entry: Some(enter_sub),
+                exit: Some(exit_sub),
+            }),
+            command: "sub",
+            help: Some("enter sub-menu"),
+        },
+    ],
+    entry: Some(enter_root),
+    exit: Some(exit_root),
+};
+
+```
+
+## Changelog
+
+### Unreleased changes
+
+* Parameter / Argument support
+* Re-worked help text system
+* Example uses `pancurses`
+
+### v0.1.0
+
+* First release