Crate use_flag 

use-flag

Primitive short, long, and boolean flag types for CLI-adjacent Rust code.

use-flag validates flag names and stores flag intent. It does not scan an argv stream, expand combined short flags, define negation policy, or implement a parser.

Example

use use_flag::{BooleanFlag, Flag};

let flag = Flag::try_from_token("--verbose")?;
let verbose = BooleanFlag::enabled(flag);

assert!(verbose.is_enabled());
assert_eq!(verbose.flag().to_token(), "--verbose");

Scope

Use this crate for small flag vocabulary. Use a parser framework when you need parsing, validation across multiple tokens, or derived command definitions.

Modules

prelude

Commonly used flag primitives.

Structs

BooleanFlag

A flag paired with a boolean state.

LongFlag

A long flag name such as verbose for --verbose.

ShortFlag

A one-character short flag such as -v.

Enums

Flag

A primitive flag token.

FlagNameError

Validation errors for primitive flag names and tokens.

Functions

is_valid_long_flag_name

Returns whether name is valid for a long flag without the leading --.

is_valid_short_flag

Returns whether name is valid for a short flag.