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// Copyright (c) The cargo-guppy Contributors
// SPDX-License-Identifier: MIT OR Apache-2.0
//! Evaluate `Cargo.toml` target specifications against platform triples.
//!
//! Cargo supports [platform-specific
//! dependencies](https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#platform-specific-dependencies).
//! These dependencies can be specified in one of two ways:
//!
//! ```toml
//! # 1. As Rust-like `#[cfg]` syntax.
//! [target.'cfg(all(unix, target_arch = "x86_64"))'.dependencies]
//! native = { path = "native/x86_64" }
//!
//! # 2. Listing out the full target triple.
//! [target.x86_64-pc-windows-gnu.dependencies]
//! winhttp = "0.4.0"
//! ```
//!
//! `target-spec` provides the `eval` API which can be used to figure out whether such a dependency
//! will be included on a particular platform.
//!
//! ```rust
//! use target_spec::eval;
//!
//! // Evaluate Rust-like `#[cfg]` syntax.
//! let cfg_target = "cfg(all(unix, target_arch = \"x86_64\"))";
//! assert_eq!(eval(cfg_target, "x86_64-unknown-linux-gnu").unwrap(), Some(true));
//! assert_eq!(eval(cfg_target, "i686-unknown-linux-gnu").unwrap(), Some(false));
//! assert_eq!(eval(cfg_target, "x86_64-pc-windows-msvc").unwrap(), Some(false));
//!
//! // Evaluate a full target-triple.
//! assert_eq!(eval("x86_64-unknown-linux-gnu", "x86_64-unknown-linux-gnu").unwrap(), Some(true));
//! assert_eq!(eval("x86_64-unknown-linux-gnu", "x86_64-pc-windows-msvc").unwrap(), Some(false));
//! ```
//!
//! For more advanced usage, see [`Platform`] and [`TargetSpec`].
//!
//! ## Optional features
//!
//! * **`custom-cfg`**: Adds support for custom targets via
//! `rustc --print=cfg` output, through
//! [`Platform::new_custom_cfg`].
//! * **`custom`**: Adds support for [custom
//! targets](https://docs.rust-embedded.org/embedonomicon/custom-target.html) via
//! target JSON, through [`Platform::new_custom`]. Implies
//! `custom-cfg`.
//! * **`summaries`**: Adds the [`summaries`] module to enable serialization of [`Platform`] and
//! [`TargetFeatures`].
//! * **`proptest1`**: Enables support for property-based testing of [`Platform`] and
//! [`TargetFeatures`] using [`proptest`].
//!
//! ## Minimum supported Rust version
//!
//! The minimum supported Rust version (MSRV) is **Rust 1.82**. The MSRV history is:
//!
//! * For target-spec 3.0.x: **Rust 1.66**.
//! * For target-spec 3.1.x: **Rust 1.73**.
//! * For target-spec 3.2.x: **Rust 1.75**.
//! * For target-spec 3.3.x and 3.4.x: **Rust 1.82**.
//! * For target-spec 3.5.x: **Rust 1.86**.
//!
//! Within the 3.x series, MSRV bumps will be accompanied by a minor version
//! update. The last 6 months of stable Rust releases will be supported.
//!
//! ## Related crates
//!
//! To pretty-print target-spec errors, consider using the [miette](https://docs.rs/miette)
//! diagnostic library with [target-spec-miette](https://crates.io/crates/target-spec-miette).
pub use Error;
pub use *;
pub use *;
pub use *;
pub use *;