style: rename crates to kebab case

crates/proc-macro-test/imp/src/lib.rs

@@ -0,0 +1,74 @@
+//! Exports a few trivial procedural macros for testing.
+
+use proc_macro::{Group, Ident, Punct, TokenStream, TokenTree};
+
+#[proc_macro]
+pub fn fn_like_noop(args: TokenStream) -> TokenStream {
+    args
+}
+
+#[proc_macro]
+pub fn fn_like_panic(args: TokenStream) -> TokenStream {
+    panic!("fn_like_panic!({})", args);
+}
+
+#[proc_macro]
+pub fn fn_like_error(args: TokenStream) -> TokenStream {
+    format!("compile_error!(\"fn_like_error!({})\");", args).parse().unwrap()
+}
+
+#[proc_macro]
+pub fn fn_like_clone_tokens(args: TokenStream) -> TokenStream {
+    clone_stream(args)
+}
+
+#[proc_macro_attribute]
+pub fn attr_noop(_args: TokenStream, item: TokenStream) -> TokenStream {
+    item
+}
+
+#[proc_macro_attribute]
+pub fn attr_panic(args: TokenStream, item: TokenStream) -> TokenStream {
+    panic!("#[attr_panic {}] {}", args, item);
+}
+
+#[proc_macro_attribute]
+pub fn attr_error(args: TokenStream, item: TokenStream) -> TokenStream {
+    format!("compile_error!(\"#[attr_error({})] {}\");", args, item).parse().unwrap()
+}
+
+#[proc_macro_derive(DeriveEmpty)]
+pub fn derive_empty(_item: TokenStream) -> TokenStream {
+    TokenStream::new()
+}
+
+#[proc_macro_derive(DerivePanic)]
+pub fn derive_panic(item: TokenStream) -> TokenStream {
+    panic!("#[derive(DerivePanic)] {}", item);
+}
+
+#[proc_macro_derive(DeriveError)]
+pub fn derive_error(item: TokenStream) -> TokenStream {
+    format!("compile_error!(\"#[derive(DeriveError)] {}\");", item).parse().unwrap()
+}
+
+fn clone_stream(ts: TokenStream) -> TokenStream {
+    ts.into_iter().map(clone_tree).collect()
+}
+
+fn clone_tree(t: TokenTree) -> TokenTree {
+    match t {
+        TokenTree::Group(orig) => {
+            let mut new = Group::new(orig.delimiter(), clone_stream(orig.stream()));
+            new.set_span(orig.span());
+            TokenTree::Group(new)
+        }
+        TokenTree::Ident(orig) => TokenTree::Ident(Ident::new(&orig.to_string(), orig.span())),
+        TokenTree::Punct(orig) => {
+            let mut new = Punct::new(orig.as_char(), orig.spacing());
+            new.set_span(orig.span());
+            TokenTree::Punct(new)
+        }
+        TokenTree::Literal(_orig) => unimplemented!(),
+    }
+}