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Make cxx.h available to high level code generators. #364

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Oct 16, 2020
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Make cxx.h available to high level code generators. #364

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c904f8a
Make cxx.h available to high level code generators.
adetaylor Oct 16, 2020
0e01d64
Expose cxx_gen::HEADER as a static &'static str
dtolnay Oct 16, 2020
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3 changes: 3 additions & 0 deletions gen/README.md
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Expand Up @@ -2,3 +2,6 @@ This directory contains CXX's C++ code generator. This code generator has two
public frontends, one a command-line application (binary) in the *cmd* directory
and the other a library intended to be used from a build.rs in the *build*
directory.

There's also a 'lib' frontend which is intended to allow higher level code generators
to embed cxx. This is not yet recommended for general use.
6 changes: 6 additions & 0 deletions gen/lib/src/lib.rs
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Expand Up @@ -22,6 +22,7 @@ mod syntax;
pub use crate::error::Error;
pub use crate::gen::{GeneratedCode, Opt};
use proc_macro2::TokenStream;
use gen::include::HEADER;

/// Generate C++ bindings code from a Rust token stream. This should be a Rust
/// token stream which somewhere contains a `#[cxx::bridge] mod {}`.
Expand All @@ -31,3 +32,8 @@ pub fn generate_header_and_cc(rust_source: TokenStream, opt: &Opt) -> Result<Gen
.map_err(Error::from)?;
gen::generate(syntax, opt).map_err(Error::from)
}

/// Returns the complete contents of the cxx.h header.
pub fn get_cxx_header_contents() -> &'static str {
HEADER
}