mirror of https://github.com/rwf2/Rocket.git
48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
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#![feature(proc_macro_span, proc_macro_diagnostic)]
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#![recursion_limit="256"]
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//! # Rocket Contrib - Code Generation
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//! This crate implements the code generation portion of the Rocket Contrib
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//! crate. This is for officially sanctioned contributor libraries that require
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//! code generation of some kind.
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//!
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//! This crate includes custom derives and procedural macros and will expand
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//! as-needed if future `rocket_contrib` features require code generation
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//! facilities.
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//!
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//! ## Procedural Macros
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//!
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//! This crate implements the following procedural macros:
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//!
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//! * **databases**
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//!
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//! The syntax for the `databases` macro is:
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//!
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//! <pre>
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//! macro := database(DATABASE_NAME)
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//! DATABASE_NAME := (string literal)
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//! </pre>
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extern crate syn;
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extern crate proc_macro;
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extern crate proc_macro2;
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#[macro_use] extern crate quote;
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mod spanned;
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#[cfg(feature = "database_attribute")]
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mod database;
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#[allow(dead_code)]
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use proc_macro::TokenStream;
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#[cfg(feature = "database_attribute")]
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#[proc_macro_attribute]
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/// The procedural macro for the `databases` annotation.
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pub fn database(attr: TokenStream, input: TokenStream) -> TokenStream {
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::database::database_attr(attr, input).unwrap_or_else(|diag| {
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diag.emit();
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TokenStream::new()
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})
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}
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