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https://github.com/askama-rs/askama.git
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6ce85f318c
This PR
* removes the crate `askama_derive_standalone`,
* makes `askama_derive` a normal library, and
* adds the proc-macro crate `askama_macros`,
Before, it was not possible for another crate to re-export
`askama::Template` in a useful way, because the generated code assumes
that it has access to an `extern crate askama`.
`askama_derive` will export the function `derive_template()` like
`askama_derive_standalone` did, but it has an additional argument to
accept a `TokenStream` that should contain (an) statement(s) to define
the identifier `askama`, e.g. `quote! { extern crate askama; }`.
The new proc-macro crate `askama_macros` now defines the derive-macro
`Template` by calling `askama_derive::derive_template()`.
Prior art: [`encase`] → [`encase_derive`] → [`encase_derive_impl`];
[2298a3e].
[`encase`]: <https://crates.io/crates/encase/0.11.0>
[`encase_derive`]: <https://crates.io/crates/encase_derive/0.11.0>
[`encase_derive_impl`]: <https://crates.io/crates/encase_derive_impl/0.11.0>
[2298a3e]: <2298a3efd5>
27 lines
715 B
Rust
27 lines
715 B
Rust
#[doc(hidden)]
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pub use askama as __askama;
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#[rustfmt::skip] // FIXME: upstream bug <https://github.com/rust-lang/rust/issues/141053>
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#[macro_export]
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macro_rules! new_greeter {
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($name:ident) => {
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#[derive(Debug, $crate::__askama::Template)]
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#[template(
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ext = "txt",
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source = "Hello, world!",
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askama = $crate::__askama
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)]
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struct $name;
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};
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}
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#[test]
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fn test_reexported_askama() {
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// This test is the an example of `askama::Template`'s doc.
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// It cannot be executed in there.
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// We show how an re-exported `askama` can be used in a macro.
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new_greeter!(HelloWorld);
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assert_eq!(HelloWorld.to_string(), "Hello, world!");
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}
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