#![recursion_limit = "1024"]
extern crate proc_macro;
extern crate proc_macro2;
extern crate pyo3_derive_backend;
#[macro_use]
extern crate quote;
#[macro_use]
extern crate syn;
use proc_macro2::Span;
use pyo3_derive_backend::*;
use syn::parse::Parser;
use syn::punctuated::Punctuated;
#[proc_macro_attribute]
pub fn mod2init(
attr: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemFn = syn::parse(input).expect("#[pymodinit] must be used on a function");
let modname: syn::Ident;
if attr.is_empty() {
modname = ast.ident.clone();
} else {
modname = syn::parse(attr).expect("could not parse module name");
}
module::process_functions_in_module(&mut ast);
let expanded = module::py2_init(&ast.ident, &modname, utils::get_doc(&ast.attrs, false));
quote!(
#ast
#expanded
)
.into()
}
#[proc_macro_attribute]
pub fn mod3init(
attr: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemFn =
syn::parse(input).expect("#[pymodinit] must be used on a `fn` block");
let modname: syn::Ident;
if attr.is_empty() {
modname = ast.ident.clone();
} else {
modname = syn::parse(attr).expect("could not parse module name");
}
module::process_functions_in_module(&mut ast);
let expanded = module::py3_init(&ast.ident, &modname, utils::get_doc(&ast.attrs, false));
quote!(
#ast
#expanded
)
.into()
}
#[proc_macro_attribute]
pub fn pyproto(
_: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemImpl =
syn::parse(input).expect("#[pyproto] must be used on an `impl` block");
let expanded = py_proto::build_py_proto(&mut ast);
quote!(
#ast
#expanded
)
.into()
}
#[proc_macro_attribute]
pub fn pyclass(
attr: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemStruct =
syn::parse(input).expect("#[pyclass] must be used on a `struct`");
let parser = Punctuated::<syn::Expr, Token![,]>::parse_terminated;
let error_message = "The macro attributes should be a list of comma separated expressions";
let args = parser
.parse(attr)
.expect(error_message)
.into_iter()
.collect();
let expanded = py_class::build_py_class(&mut ast, &args);
quote!(
#ast
#expanded
)
.into()
}
#[proc_macro_attribute]
pub fn pymethods(
_: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemImpl =
syn::parse(input.clone()).expect("#[pymethods] must be used on an `impl` block");
let expanded = py_impl::build_py_methods(&mut ast);
quote!(
#ast
#expanded
)
.into()
}
#[proc_macro_attribute]
pub fn pyfunction(
_: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
let mut ast: syn::ItemFn = syn::parse(input).expect("#[function] must be used on a `fn` block");
let python_name = syn::Ident::new(
&ast.ident.to_string().trim_left_matches("r#"),
Span::call_site(),
);
let expanded = module::add_fn_to_module(&mut ast, &python_name, Vec::new());
quote!(
#ast
#expanded
)
.into()
}