Debug pin macro (#118)

* debug pin macro

* Added debug pinning macro

* working on windows

* removed remaining box pins

theseus_macros/src/lib.rs

@@ -0,0 +1,36 @@
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::{parse_macro_input, ItemFn};
+
+#[proc_macro_attribute]
+pub fn debug_pin(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    // Parse the input tokens into a syntax tree
+    let input = parse_macro_input!(item as ItemFn);
+
+    let attrs = &input.attrs;
+    let vis = &input.vis; // visibility modifier
+    let sig = &input.sig; // function signature
+    let body = &input.block;
+
+    // Use cfg attribute for conditional compilation
+    let result = quote! {
+        #[cfg(debug_assertions)]
+        #(#attrs) *
+        #vis #sig {
+            Box::pin(async move {
+                #body
+            }).await
+        }
+
+        #[cfg(not(debug_assertions))]
+        #(#attrs) *
+        #vis #sig {
+            #body
+        }
+    };
+
+    // Hand the output tokens back to the compiler
+    TokenStream::from(result)
+}