From 24ef322b57d29d26224e7f9e772b3691143b2da2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gustav@sornas.net>
Date: Fri, 19 Feb 2021 19:19:44 +0100
Subject: begin work on automatic link

---
 Cargo.lock            |  1 +
 sylt_macro/Cargo.toml |  1 +
 sylt_macro/src/lib.rs | 21 +++++++++++++++++++++
 3 files changed, 23 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index f7d2ec1..44e16d0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -531,6 +531,7 @@ dependencies = [
 name = "sylt_macro"
 version = "0.1.0"
 dependencies = [
+ "lazy_static",
  "quote",
  "syn",
 ]
diff --git a/sylt_macro/Cargo.toml b/sylt_macro/Cargo.toml
index 9ac045e..04ae39d 100644
--- a/sylt_macro/Cargo.toml
+++ b/sylt_macro/Cargo.toml
@@ -12,3 +12,4 @@ proc-macro = true
 [dependencies]
 syn = { version = "1.0", features=["full"] }
 quote = "1.0"
+lazy_static = "1.4"
diff --git a/sylt_macro/src/lib.rs b/sylt_macro/src/lib.rs
index 1cafde8..9bfef65 100644
--- a/sylt_macro/src/lib.rs
+++ b/sylt_macro/src/lib.rs
@@ -1,5 +1,7 @@
+use lazy_static::lazy_static;
 use proc_macro::TokenStream;
 use quote::quote;
+use std::borrow::Cow;
 use syn::{Expr, Pat, Token, parse::{Parse, ParseStream, Result}, parse_macro_input};
 
 struct ExternBlock {
@@ -91,3 +93,22 @@ pub fn extern_function(tokens: TokenStream) -> TokenStream {
     };
     TokenStream::from(tokens)
 }
+
+#[proc_macro_attribute]
+pub fn extern_link(attr: TokenStream, tokens: TokenStream) -> TokenStream {
+    let parsed: syn::ItemFn = parse_macro_input!(tokens);
+
+    let name = if attr.is_empty() {
+        Cow::Borrowed(&parsed.sig.ident)
+    } else {
+        let attr: syn::Ident = parse_macro_input!(attr);
+        Cow::Owned(attr)
+    };
+
+    let tokens = quote! {
+        #parsed
+
+
+    };
+    TokenStream::from(tokens)
+}
-- 
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