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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 18:31:44 +0000 |
commit | c23a457e72abe608715ac76f076f47dc42af07a5 (patch) | |
tree | 2772049aaf84b5c9d0ed12ec8d86812f7a7904b6 /vendor/clap/src/_derive/_tutorial.rs | |
parent | Releasing progress-linux version 1.73.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-c23a457e72abe608715ac76f076f47dc42af07a5.tar.xz rustc-c23a457e72abe608715ac76f076f47dc42af07a5.zip |
Merging upstream version 1.74.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/clap/src/_derive/_tutorial.rs')
-rw-r--r-- | vendor/clap/src/_derive/_tutorial.rs | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/vendor/clap/src/_derive/_tutorial.rs b/vendor/clap/src/_derive/_tutorial.rs deleted file mode 100644 index 2a9145fa2..000000000 --- a/vendor/clap/src/_derive/_tutorial.rs +++ /dev/null @@ -1,250 +0,0 @@ -// Contributing -// -// New example code: -// - Please update the corresponding section in the derive tutorial -// - Building: They must be added to `Cargo.toml` with the appropriate `required-features`. -// - Testing: Ensure there is a markdown file with [trycmd](https://docs.rs/trycmd) syntax -// -// See also the general CONTRIBUTING - -//! # Documentation: Derive Tutorial -//! -//! 1. [Quick Start](#quick-start) -//! 2. [Configuring the Parser](#configuring-the-parser) -//! 3. [Adding Arguments](#adding-arguments) -//! 1. [Positionals](#positionals) -//! 2. [Options](#options) -//! 3. [Flags](#flags) -//! 4. [Subcommands](#subcommands) -//! 5. [Defaults](#defaults) -//! 4. Validation -//! 1. [Enumerated values](#enumerated-values) -//! 2. [Validated values](#validated-values) -//! 3. [Argument Relations](#argument-relations) -//! 4. [Custom Validation](#custom-validation) -//! 5. [Testing](#testing) -//! 6. [Next Steps](#next-steps) -//! -//! See also -//! - [FAQ: When should I use the builder vs derive APIs?][crate::_faq#when-should-i-use-the-builder-vs-derive-apis] -//! - The [cookbook][crate::_cookbook] for more application-focused examples -//! -//! ## Quick Start -//! -//! You can create an application declaratively with a `struct` and some -//! attributes. -//! -//! First, ensure `clap` is available with the [`derive` feature flag][crate::_features]: -//! ```console -//! $ cargo add clap --features derive -//! ``` -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/01_quick.rs")] -//! ``` -//! -#![doc = include_str!("../../examples/tutorial_derive/01_quick.md")] -//! -//! ## Configuring the Parser -//! -//! You use derive [`Parser`][crate::Parser] to start building a parser. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/02_apps.rs")] -//! ``` -//! -#![doc = include_str!("../../examples/tutorial_derive/02_apps.md")] -//! -//! You can use [`#[command(author, version, about)]` attribute defaults][super#command-attributes] to fill these fields in from your `Cargo.toml` file. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/02_crate.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/02_crate.md")] -//! -//! You can use attributes to change the application level behavior of clap. Any [`Command`][crate::Command] builder function can be used as an attribute, like [`Command::next_line_help`]. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/02_app_settings.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/02_app_settings.md")] -//! -//! ## Adding Arguments -//! -//! ### Positionals -//! -//! You can have users specify values by their position on the command-line: -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_03_positional.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_03_positional.md")] -//! -//! Note that the [default `ArgAction` is `Set`][super#arg-types]. To -//! accept multiple values, override the [action][Arg::action] with [`Append`][crate::ArgAction::Append] via `Vec`: -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_03_positional_mult.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_03_positional_mult.md")] -//! -//! ### Options -//! -//! You can name your arguments with a flag: -//! - Order doesn't matter -//! - They can be optional -//! - Intent is clearer -//! -//! The [`#[arg(short = 'n')]`][Arg::short] and [`#[arg(long = "name")]`][Arg::long] attributes that define -//! the flags are [`Arg`][crate::Args] methods that are derived from the field name when no value -//! is specified ([`#[arg(short)]` and `#[arg(long)]`][super#arg-attributes]). -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_02_option.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_02_option.md")] -//! -//! Note that the [default `ArgAction` is `Set`][super#arg-types]. To -//! accept multiple occurrences, override the [action][Arg::action] with [`Append`][crate::ArgAction::Append] via `Vec`: -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_02_option_mult.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_02_option_mult.md")] -//! -//! ### Flags -//! -//! Flags can also be switches that can be on/off: -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_01_flag_bool.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_01_flag_bool.md")] -//! -//! Note that the [default `ArgAction` for a `bool` field is -//! `SetTrue`][super#arg-types]. To accept multiple flags, override the [action][Arg::action] with -//! [`Count`][crate::ArgAction::Count]: -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_01_flag_count.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_01_flag_count.md")] -//! -//! ### Subcommands -//! -//! Subcommands are derived with `#[derive(Subcommand)]` and be added via [`#[command(subcommand)]` attribute][super#command-attributes]. Each -//! instance of a [Subcommand][crate::Subcommand] can have its own version, author(s), Args, and even its own -//! subcommands. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_04_subcommands.rs")] -//! ``` -//! We used a struct-variant to define the `add` subcommand. -//! Alternatively, you can use a struct for your subcommand's arguments: -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_04_subcommands_alt.rs")] -//! ``` -//! -#![doc = include_str!("../../examples/tutorial_derive/03_04_subcommands.md")] -//! -//! ### Defaults -//! -//! We've previously showed that arguments can be [`required`][crate::Arg::required] or optional. -//! When optional, you work with a `Option` and can `unwrap_or`. Alternatively, you can -//! set [`#[arg(default_value_t)]`][super#arg-attributes]. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/03_05_default_values.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/03_05_default_values.md")] -//! -//! ## Validation -//! -//! An appropriate default parser/validator will be selected for the field's type. See -//! [`value_parser!`][crate::value_parser!] for more details. -//! -//! ### Enumerated values -//! -//! For example, if you have arguments of specific values you want to test for, you can derive -//! [`ValueEnum`][super#valueenum-attributes] -//! (any [`PossibleValue`] builder function can be used as variant attributes). -//! -//! This allows you specify the valid values for that argument. If the user does not use one of -//! those specific values, they will receive a graceful exit with error message informing them -//! of the mistake, and what the possible valid values are -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/04_01_enum.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/04_01_enum.md")] -//! -//! ### Validated values -//! -//! More generally, you can validate and parse into any data type with [`Arg::value_parser`]. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/04_02_parse.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/04_02_parse.md")] -//! -//! A [custom parser][TypedValueParser] can be used to improve the error messages or provide additional validation: -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/04_02_validate.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/04_02_validate.md")] -//! -//! See [`Arg::value_parser`][crate::Arg::value_parser] for more details. -//! -//! ### Argument Relations -//! -//! You can declare dependencies or conflicts between [`Arg`][crate::Arg]s or even -//! [`ArgGroup`][crate::ArgGroup]s. -//! -//! [`ArgGroup`][crate::ArgGroup]s make it easier to declare relations instead of having to list -//! each individually, or when you want a rule to apply "any but not all" arguments. -//! -//! Perhaps the most common use of [`ArgGroup`][crate::ArgGroup]s is to require one and *only* one -//! argument to be present out of a given set. Imagine that you had multiple arguments, and you -//! want one of them to be required, but making all of them required isn't feasible because perhaps -//! they conflict with each other. -//! -//! [`ArgGroup`][crate::ArgGroup]s are automatically created for a `struct` with its -//! [`ArgGroup::id`][crate::ArgGroup::id] being the struct's name. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/04_03_relations.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/04_03_relations.md")] -//! -//! ### Custom Validation -//! -//! As a last resort, you can create custom errors with the basics of clap's formatting. -//! -//! ```rust -#![doc = include_str!("../../examples/tutorial_derive/04_04_custom.rs")] -//! ``` -#![doc = include_str!("../../examples/tutorial_derive/04_04_custom.md")] -//! -//! ## Testing -//! -//! clap reports most development errors as `debug_assert!`s. Rather than checking every -//! subcommand, you should have a test that calls -//! [`Command::debug_assert`][crate::Command::debug_assert]: -//! ```rust,no_run -#![doc = include_str!("../../examples/tutorial_derive/05_01_assert.rs")] -//! ``` -//! -//! ## Next Steps -//! -//! - [Cookbook][crate::_cookbook] for application-focused examples -//! - Explore more features in the [Derive reference][super] -//! - See also [`Command`], [`Arg`], [`ArgGroup`], and [`PossibleValue`] builder functions which -//! can be used as attributes -//! -//! For support, see [Discussions](https://github.com/clap-rs/clap/discussions) - -#![allow(unused_imports)] -use crate::builder::Arg; -use crate::builder::ArgGroup; -use crate::builder::Command; -use crate::builder::PossibleValue; -use crate::builder::TypedValueParser; |