Merge #3392

3392: Implement concat eager macro  r=matklad a=edwin0cheng

This PR implements the following things:

1. Add basic eager macro infrastructure by introducing `EagerCallId` such that the new `MacroCallId` is defined as :

```
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub enum MacroCallId {
    LazyMacro(LazyMacroId),
    EagerMacro(EagerMacroId),
}
```

2. Add `concat!` builtin macro.




Co-authored-by: Edwin Cheng <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_parser/src/lib.rs b/crates/ra_parser/src/lib.rs
index 81055746b..652492c1e 100644
--- a/crates/ra_parser/src/lib.rs
+++ b/crates/ra_parser/src/lib.rs
@@ -83,7 +83,7 @@ pub fn parse(token_source: &mut dyn TokenSource, tree_sink: &mut dyn TreeSink) {
     parse_from_tokens(token_source, tree_sink, grammar::root);
 }
 
-#[derive(Clone, Copy)]
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
 pub enum FragmentKind {
     Path,
     Expr,