54 lines
1.3 KiB
Rust
54 lines
1.3 KiB
Rust
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use proc_macro::TokenStream;
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use quote::quote;
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use syn;
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// cbind!(fn start_cwtch(app_dir: &str, tor_path: &str) -> i32 {c_StartCwtch});
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#[proc_macro]
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pub fn cbind(_def: TokenStream) -> TokenStream {
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//dbg!(&_def);
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let ast: syn::ItemFn = syn::parse(_def).unwrap();
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dbg!(&ast);
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let fn_name = ast.sig.ident;
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let fn_call = match &ast.block.stmts[0] {
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syn::Stmt::Expr(expr) => match expr {
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syn::Expr::Path(expr) => Ok(expr.path.segments[0].ident.to_string()),
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_ => Err("".to_string()),
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}
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_ => Err("".to_string()),
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};
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let ret_type = match &ast.sig.output {
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syn::ReturnType::Type(_, box_type) => {
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let ty= &**box_type;
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match ty {
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syn::Type::Path(p) => {
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if p.path.segments.len() == 1 {
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Some(p.path.segments[0].ident.to_string())
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} else {
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None
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}
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}
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_ => None
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}
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}
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_ => None
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};
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dbg!(fn_call);
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dbg!(ret_type);
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let args = ast.sig.inputs;
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quote!(fn #fn_name(&self) {}).into()
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}
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#[cfg(test)]
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mod tests {
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#[test]
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fn it_works() {
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let result = 2 + 2;
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assert_eq!(result, 4);
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}
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}
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