From b7c141e0b5c66c51db7171b1de30d4c60d1048c0 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 28 Jan 2018 22:59:18 +0300
Subject: Parse enums

---
 src/parser/event_parser/grammar/expressions.rs   |  6 +++++
 src/parser/event_parser/grammar/items/mod.rs     |  6 ++++-
 src/parser/event_parser/grammar/items/structs.rs | 34 ++++++++++++++++++++++++
 src/syntax_kinds.rs                              |  4 +++
 4 files changed, 49 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/parser/event_parser/grammar/expressions.rs b/src/parser/event_parser/grammar/expressions.rs
index c81dc6c35..8caaf3553 100644
--- a/src/parser/event_parser/grammar/expressions.rs
+++ b/src/parser/event_parser/grammar/expressions.rs
@@ -12,3 +12,9 @@ pub(super) fn literal(p: &mut Parser) -> bool {
         _ => false,
     }
 }
+
+pub(super) fn expr(p: &mut Parser) {
+    if !literal(p) {
+        p.error().message("expected expression").emit();
+    }
+}
diff --git a/src/parser/event_parser/grammar/items/mod.rs b/src/parser/event_parser/grammar/items/mod.rs
index f10fb230b..886c02d37 100644
--- a/src/parser/event_parser/grammar/items/mod.rs
+++ b/src/parser/event_parser/grammar/items/mod.rs
@@ -10,7 +10,7 @@ pub(super) fn mod_contents(p: &mut Parser, stop_on_r_curly: bool) {
 }
 
 pub(super) const ITEM_FIRST: TokenSet =
-    token_set![EXTERN_KW, MOD_KW, USE_KW, STRUCT_KW, FN_KW, PUB_KW, POUND,];
+    token_set![EXTERN_KW, MOD_KW, USE_KW, STRUCT_KW, ENUM_KW, FN_KW, PUB_KW, POUND];
 
 fn item(p: &mut Parser) {
     let item = p.start();
@@ -34,6 +34,10 @@ fn item(p: &mut Parser) {
             structs::struct_item(p);
             STRUCT_ITEM
         }
+        ENUM_KW => {
+            structs::enum_item(p);
+            ENUM_ITEM
+        }
         FN_KW => {
             fn_item(p);
             FN_ITEM
diff --git a/src/parser/event_parser/grammar/items/structs.rs b/src/parser/event_parser/grammar/items/structs.rs
index 0934f3d28..670406071 100644
--- a/src/parser/event_parser/grammar/items/structs.rs
+++ b/src/parser/event_parser/grammar/items/structs.rs
@@ -40,6 +40,40 @@ pub(super) fn struct_item(p: &mut Parser) {
     }
 }
 
+pub(super) fn enum_item(p: &mut Parser) {
+    assert!(p.at(ENUM_KW));
+    p.bump();
+    p.expect(IDENT);
+    type_param_list(p);
+    where_clause(p);
+    if p.expect(L_CURLY) {
+        while !p.at(EOF) && !p.at(R_CURLY) {
+            let var = p.start();
+            attributes::outer_attributes(p);
+            if p.at(IDENT) {
+                p.bump();
+                match p.current() {
+                    L_CURLY => named_fields(p),
+                    L_PAREN => pos_fields(p),
+                    EQ => {
+                        p.bump();
+                        expressions::expr(p);
+                    }
+                    _ => ()
+                }
+                var.complete(p, ENUM_VARIANT);
+            } else {
+                var.abandon(p);
+                p.err_and_bump("expected enum variant");
+            }
+            if !p.at(R_CURLY) {
+                p.expect(COMMA);
+            }
+        }
+        p.expect(R_CURLY);
+    }
+}
+
 fn named_fields(p: &mut Parser) {
     assert!(p.at(L_CURLY));
     p.bump();
diff --git a/src/syntax_kinds.rs b/src/syntax_kinds.rs
index b6c281cd5..519326f48 100644
--- a/src/syntax_kinds.rs
+++ b/src/syntax_kinds.rs
@@ -76,6 +76,8 @@ pub enum SyntaxKind {
     SHEBANG,
     FILE,
     STRUCT_ITEM,
+    ENUM_ITEM,
+    ENUM_VARIANT,
     NAMED_FIELD,
     POS_FIELD,
     FN_ITEM,
@@ -176,6 +178,8 @@ impl SyntaxKind {
             SHEBANG => &SyntaxInfo { name: "SHEBANG" },
             FILE => &SyntaxInfo { name: "FILE" },
             STRUCT_ITEM => &SyntaxInfo { name: "STRUCT_ITEM" },
+            ENUM_ITEM => &SyntaxInfo { name: "ENUM_ITEM" },
+            ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
             POS_FIELD => &SyntaxInfo { name: "POS_FIELD" },
             FN_ITEM => &SyntaxInfo { name: "FN_ITEM" },
-- 
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