From eb4c05d572ff0c4e92452232d6591d7a2796e785 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 11 Feb 2018 11:54:09 +0300
Subject: G: reference types

---
 grammar.ron                                       |  1 +
 src/parser/grammar/types.rs                       | 15 +++++++
 src/syntax_kinds.rs                               |  2 +
 tests/data/parser/inline/0026_reference_type;.rs  |  3 ++
 tests/data/parser/inline/0026_reference_type;.txt | 50 +++++++++++++++++++++++
 5 files changed, 71 insertions(+)
 create mode 100644 tests/data/parser/inline/0026_reference_type;.rs
 create mode 100644 tests/data/parser/inline/0026_reference_type;.txt

diff --git a/grammar.ron b/grammar.ron
index bc7dd7c55..0905c282a 100644
--- a/grammar.ron
+++ b/grammar.ron
@@ -108,6 +108,7 @@ Grammar(
         "POINTER_TYPE",
         "ARRAY_TYPE",
         "SLICE_TYPE",
+        "REFERENCE_TYPE",
 
         "EXTERN_BLOCK",
         "ENUM_VARIANT",
diff --git a/src/parser/grammar/types.rs b/src/parser/grammar/types.rs
index 4eb333b54..003341db5 100644
--- a/src/parser/grammar/types.rs
+++ b/src/parser/grammar/types.rs
@@ -6,6 +6,7 @@ pub(super) fn type_(p: &mut Parser) {
         EXCL => never_type(p),
         STAR => pointer_type(p),
         L_BRACK => array_or_slice_type(p),
+        AMPERSAND => reference_type(p),
         IDENT => path_type(p),
         _ => {
             p.error("expected type");
@@ -115,6 +116,20 @@ fn array_or_slice_type(p: &mut Parser) {
     m.complete(p, kind);
 }
 
+// test reference_type;
+// type A = &();
+// type B = &'static ();
+// type C = &mut ();
+fn reference_type(p: &mut Parser) {
+    assert!(p.at(AMPERSAND));
+    let m = p.start();
+    p.bump();
+    p.eat(LIFETIME);
+    p.eat(MUT_KW);
+    type_no_plus(p);
+    m.complete(p, REFERENCE_TYPE);
+}
+
 fn path_type(p: &mut Parser) {
     assert!(p.at(IDENT));
     let m = p.start();
diff --git a/src/syntax_kinds.rs b/src/syntax_kinds.rs
index 54200f2d1..597550a32 100644
--- a/src/syntax_kinds.rs
+++ b/src/syntax_kinds.rs
@@ -106,6 +106,7 @@ pub enum SyntaxKind {
     POINTER_TYPE,
     ARRAY_TYPE,
     SLICE_TYPE,
+    REFERENCE_TYPE,
     EXTERN_BLOCK,
     ENUM_VARIANT,
     NAMED_FIELD,
@@ -238,6 +239,7 @@ impl SyntaxKind {
             POINTER_TYPE => &SyntaxInfo { name: "POINTER_TYPE" },
             ARRAY_TYPE => &SyntaxInfo { name: "ARRAY_TYPE" },
             SLICE_TYPE => &SyntaxInfo { name: "SLICE_TYPE" },
+            REFERENCE_TYPE => &SyntaxInfo { name: "REFERENCE_TYPE" },
             EXTERN_BLOCK => &SyntaxInfo { name: "EXTERN_BLOCK" },
             ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
diff --git a/tests/data/parser/inline/0026_reference_type;.rs b/tests/data/parser/inline/0026_reference_type;.rs
new file mode 100644
index 000000000..3ac0badab
--- /dev/null
+++ b/tests/data/parser/inline/0026_reference_type;.rs
@@ -0,0 +1,3 @@
+type A = &();
+type B = &'static ();
+type C = &mut ();
diff --git a/tests/data/parser/inline/0026_reference_type;.txt b/tests/data/parser/inline/0026_reference_type;.txt
new file mode 100644
index 000000000..665c021e1
--- /dev/null
+++ b/tests/data/parser/inline/0026_reference_type;.txt
@@ -0,0 +1,50 @@
+FILE@[0; 54)
+  TYPE_ITEM@[0; 14)
+    TYPE_KW@[0; 4)
+    NAME@[4; 7)
+      WHITESPACE@[4; 5)
+      IDENT@[5; 6) "A"
+      WHITESPACE@[6; 7)
+    EQ@[7; 8)
+    REFERENCE_TYPE@[8; 12)
+      WHITESPACE@[8; 9)
+      AMPERSAND@[9; 10)
+      TUPLE_TYPE@[10; 12)
+        L_PAREN@[10; 11)
+        R_PAREN@[11; 12)
+    SEMI@[12; 13)
+    WHITESPACE@[13; 14)
+  TYPE_ITEM@[14; 36)
+    TYPE_KW@[14; 18)
+    NAME@[18; 21)
+      WHITESPACE@[18; 19)
+      IDENT@[19; 20) "B"
+      WHITESPACE@[20; 21)
+    EQ@[21; 22)
+    REFERENCE_TYPE@[22; 34)
+      WHITESPACE@[22; 23)
+      AMPERSAND@[23; 24)
+      LIFETIME@[24; 31) "'static"
+      TUPLE_TYPE@[31; 34)
+        WHITESPACE@[31; 32)
+        L_PAREN@[32; 33)
+        R_PAREN@[33; 34)
+    SEMI@[34; 35)
+    WHITESPACE@[35; 36)
+  TYPE_ITEM@[36; 54)
+    TYPE_KW@[36; 40)
+    NAME@[40; 43)
+      WHITESPACE@[40; 41)
+      IDENT@[41; 42) "C"
+      WHITESPACE@[42; 43)
+    EQ@[43; 44)
+    REFERENCE_TYPE@[44; 52)
+      WHITESPACE@[44; 45)
+      AMPERSAND@[45; 46)
+      MUT_KW@[46; 49)
+      TUPLE_TYPE@[49; 52)
+        WHITESPACE@[49; 50)
+        L_PAREN@[50; 51)
+        R_PAREN@[51; 52)
+    SEMI@[52; 53)
+    WHITESPACE@[53; 54)
-- 
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