diff --git a/crates/macro-support/Cargo.toml b/crates/macro-support/Cargo.toml new file mode 100644 index 00000000..2195c032 --- /dev/null +++ b/crates/macro-support/Cargo.toml @@ -0,0 +1,22 @@ +[package] +name = "wasm-bindgen-macro-support" +version = "0.2.15" +authors = ["The wasm-bindgen Developers"] +license = "MIT/Apache-2.0" +repository = "https://github.com/rustwasm/wasm-bindgen/tree/master/crates/macro-support" +homepage = "https://rustwasm.github.io/wasm-bindgen/" +documentation = "https://docs.rs/wasm-bindgen" +description = """ +The part of the implementation of the `#[wasm_bindgen]` attribute that is not in the shared backend crate +""" + +[features] +spans = ["proc-macro2/nightly", "wasm-bindgen-backend/spans"] +extra-traits = ["syn/extra-traits"] + +[dependencies] +syn = { version = '0.14', features = ['full'] } +quote = '0.6' +proc-macro2 = "0.4.9" +wasm-bindgen-backend = { path = "../backend", version = "=0.2.15" } +wasm-bindgen-shared = { path = "../shared", version = "=0.2.15" } diff --git a/crates/macro-support/LICENSE-APACHE b/crates/macro-support/LICENSE-APACHE new file mode 100644 index 00000000..16fe87b0 --- /dev/null +++ b/crates/macro-support/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/crates/macro-support/src/lib.rs b/crates/macro-support/src/lib.rs new file mode 100755 index 00000000..a38be868 --- /dev/null +++ b/crates/macro-support/src/lib.rs @@ -0,0 +1,26 @@ +//! This crate contains the part of the implementation of the `#[wasm_bindgen]` optsibute that is +//! not in the shared backend crate. + +#![doc(html_root_url = "https://docs.rs/wasm-bindgen-macro-support/0.2")] + +extern crate proc_macro2; +extern crate quote; +#[macro_use] +extern crate syn; +extern crate wasm_bindgen_backend as backend; +extern crate wasm_bindgen_shared as shared; + +pub use parser::BindgenAttrs; +use parser::MacroParse; +use quote::ToTokens; + +mod parser; + +/// Takes the parsed input from a `#[wasm_bindgen]` macro and returns the generated bindings +pub fn expand(item: syn::Item, opts: parser::BindgenAttrs) -> proc_macro2::TokenStream { + let mut tokens = proc_macro2::TokenStream::new(); + let mut program = backend::ast::Program::default(); + item.macro_parse(&mut program, (Some(opts), &mut tokens)); + program.to_tokens(&mut tokens); + tokens +} diff --git a/crates/macro/src/parser.rs b/crates/macro-support/src/parser.rs similarity index 100% rename from crates/macro/src/parser.rs rename to crates/macro-support/src/parser.rs diff --git a/crates/macro/Cargo.toml b/crates/macro/Cargo.toml index 282e94a2..2b2b327f 100644 --- a/crates/macro/Cargo.toml +++ b/crates/macro/Cargo.toml @@ -14,12 +14,10 @@ Definition of the `#[wasm_bindgen]` attribute, an internal dependency proc-macro = true [features] -spans = ["proc-macro2/nightly", "wasm-bindgen-backend/spans"] +spans = ["proc-macro2/nightly", "wasm-bindgen-macro-support/spans"] xxx_debug_only_print_generated_code = [] [dependencies] syn = { version = '0.14', features = ['full'] } -quote = '0.6' proc-macro2 = "0.4.9" -wasm-bindgen-backend = { path = "../backend", version = "=0.2.15" } -wasm-bindgen-shared = { path = "../shared", version = "=0.2.15" } +wasm-bindgen-macro-support = { path = "../macro-support", version = "=0.2.15" } diff --git a/crates/macro/src/lib.rs b/crates/macro/src/lib.rs index 4cac59a5..b0eceb63 100755 --- a/crates/macro/src/lib.rs +++ b/crates/macro/src/lib.rs @@ -2,33 +2,22 @@ extern crate proc_macro; extern crate proc_macro2; -extern crate quote; -extern crate wasm_bindgen_shared as shared; -#[macro_use] extern crate syn; -extern crate wasm_bindgen_backend as backend; +extern crate wasm_bindgen_macro_support as macro_support; +use macro_support::BindgenAttrs; use proc_macro::TokenStream; -use quote::ToTokens; - -mod parser; - -use parser::MacroParse; #[proc_macro_attribute] pub fn wasm_bindgen(attr: TokenStream, input: TokenStream) -> TokenStream { let item = syn::parse::(input.clone()).expect("expected a valid Rust item"); - let opts = - syn::parse::(attr).expect("invalid arguments to #[wasm_bindgen]"); + let opts = syn::parse::(attr).expect("invalid arguments to #[wasm_bindgen]"); - let mut ret = proc_macro2::TokenStream::new(); - let mut program = backend::ast::Program::default(); - item.macro_parse(&mut program, (Some(opts), &mut ret)); - program.to_tokens(&mut ret); + let tokens = macro_support::expand(item, opts); if cfg!(feature = "xxx_debug_only_print_generated_code") { - println!("{}", ret); + println!("{}", tokens); } - ret.into() + tokens.into() }