Generic params in structs

1 files changed, 43 insertions, 1 deletions

diff --git a/src/parser/event_parser/grammar/items/mod.rs b/src/parser/event_parser/grammar/items/mod.rs
index 867776415..f10fb230b 100644
--- a/src/parser/event_parser/grammar/items/mod.rs
+++ b/src/parser/event_parser/grammar/items/mod.rs
@@ -59,7 +59,49 @@ fn item(p: &mut Parser) {
     item.complete(p, item_kind);
 }
 
-fn generic_parameters(_: &mut Parser) {}
+fn type_param_list(p: &mut Parser) {
+    if !p.at(L_ANGLE) {
+        return;
+    }
+    let m = p.start();
+    p.bump();
+
+    while !p.at(EOF) && !p.at(R_ANGLE) {
+        match p.current() {
+            LIFETIME => lifetime_param(p),
+            IDENT => type_param(p),
+            _ => p.err_and_bump("expected type parameter"),
+        }
+        if !p.at(R_ANGLE) && !p.expect(COMMA) {
+            break;
+        }
+    }
+    p.expect(R_ANGLE);
+    m.complete(p, TYPE_PARAM_LIST);
+
+    fn lifetime_param(p: &mut Parser) {
+        assert!(p.at(LIFETIME));
+        let m = p.start();
+        p.bump();
+        if p.eat(COLON) {
+            while p.at(LIFETIME) {
+                p.bump();
+                if !p.eat(PLUS) {
+                    break;
+                }
+            }
+        }
+        m.complete(p, LIFETIME_PARAM);
+    }
+
+    fn type_param(p: &mut Parser) {
+        assert!(p.at(IDENT));
+        let m = p.start();
+        p.bump();
+        m.complete(p, TYPE_PARAM);
+        //TODO: bounds
+    }
+}
 
 fn where_clause(_: &mut Parser) {}