From 8ca02acb5a574c312dcb3842904b99b282d45883 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 28 Jan 2018 18:53:53 +0300
Subject: Generic params in structs

---
 src/parser/event_parser/grammar/items/mod.rs     | 44 +++++++++++++++++++++++-
 src/parser/event_parser/grammar/items/structs.rs |  2 +-
 2 files changed, 44 insertions(+), 2 deletions(-)

(limited to 'src/parser/event_parser/grammar/items')

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) {}
 
diff --git a/src/parser/event_parser/grammar/items/structs.rs b/src/parser/event_parser/grammar/items/structs.rs
index b31cf18df..0934f3d28 100644
--- a/src/parser/event_parser/grammar/items/structs.rs
+++ b/src/parser/event_parser/grammar/items/structs.rs
@@ -7,7 +7,7 @@ pub(super) fn struct_item(p: &mut Parser) {
     if !p.expect(IDENT) {
         return;
     }
-    generic_parameters(p);
+    type_param_list(p);
     match p.current() {
         WHERE_KW => {
             where_clause(p);
-- 
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