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General purpose python macros (kaspanet#58)
* kaspa-python-macros * cleanup + rename 'inner' to 'client'
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| [package] | ||
| name = "kaspa-python-macros" | ||
| rust-version.workspace = true | ||
| authors.workspace = true | ||
| edition.workspace = true | ||
| license.workspace = true | ||
| version.workspace = true | ||
| repository.workspace = true | ||
| keywords = ["kaspa","python"] | ||
| categories = [] | ||
| exclude = ["/.*", "/test"] | ||
| description = """ | ||
| Macros for the Kaspa Python bindings | ||
| """ | ||
|
|
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| [lib] | ||
| proc-macro = true | ||
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|
||
| [dependencies] | ||
| convert_case.workspace = true | ||
| proc-macro-error = { version = "1.0.0", default-features = false } | ||
| proc-macro2 = { version = "1.0.43" } | ||
| quote = "1.0.21" | ||
| regex.workspace = true | ||
| syn = {version="1.0.99",features=["full","fold","extra-traits","parsing","proc-macro"]} # do not update! |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| use proc_macro::TokenStream; | ||
| use proc_macro_error::proc_macro_error; | ||
|
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| mod py_async; | ||
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| #[proc_macro] | ||
| #[proc_macro_error] | ||
| pub fn py_async(input: TokenStream) -> TokenStream { | ||
| py_async::py_async(input) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| use proc_macro2::TokenStream; | ||
| use quote::{quote, ToTokens}; | ||
| use std::convert::Into; | ||
| use syn::{ | ||
| parse::{Parse, ParseStream}, | ||
| parse_macro_input, | ||
| punctuated::Punctuated, | ||
| Error, Expr, ExprAsync, Result, Token, | ||
| }; | ||
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| #[derive(Debug)] | ||
| struct PyAsync { | ||
| py: Expr, | ||
| block: ExprAsync, | ||
| } | ||
|
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| impl Parse for PyAsync { | ||
| fn parse(input: ParseStream) -> Result<Self> { | ||
| let parsed = Punctuated::<Expr, Token![,]>::parse_terminated(input).unwrap(); | ||
| if parsed.len() != 2 { | ||
| return Err(Error::new_spanned(parsed, "usage: py_async!{py, async move { Ok(()) }}".to_string())); | ||
| } | ||
|
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| let mut iter = parsed.iter(); | ||
| // python object (py: Python) | ||
| let py = iter.next().unwrap().clone(); | ||
|
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| // async block to encapsulate | ||
| let block = match iter.next().unwrap().clone() { | ||
| Expr::Async(block) => block, | ||
| statement => { | ||
| return Err(Error::new_spanned(statement, "the argument must be an async block".to_string())); | ||
| } | ||
| }; | ||
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| Ok(PyAsync { py, block }) | ||
| } | ||
| } | ||
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| impl ToTokens for PyAsync { | ||
| fn to_tokens(&self, tokens: &mut TokenStream) { | ||
| let PyAsync { py, block } = self; | ||
|
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| quote! { | ||
| let __fut__ = #block; | ||
| let __py_fut__ = pyo3_asyncio_0_21::tokio::future_into_py(#py, __fut__)?; | ||
| pyo3::prelude::Python::with_gil(|py| Ok(__py_fut__.into_py(#py))) | ||
| } | ||
| .to_tokens(tokens); | ||
| } | ||
| } | ||
|
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| pub fn py_async(input: proc_macro::TokenStream) -> proc_macro::TokenStream { | ||
| let py_async = parse_macro_input!(input as PyAsync); | ||
| let token_stream = py_async.to_token_stream(); | ||
| // println!("MACRO: {}", token_stream.to_string()); | ||
| token_stream.into() | ||
| } |
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