From 2fb33b2d0d14f09ee06a42bca252dccbf57185e1 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sun, 11 Feb 2018 11:57:05 +0300
Subject: G: placeholder types

---
 src/parser/grammar/types.rs | 10 ++++++++++
 src/syntax_kinds.rs         |  2 ++
 2 files changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/parser/grammar/types.rs b/src/parser/grammar/types.rs
index 003341db5..37b74bfe7 100644
--- a/src/parser/grammar/types.rs
+++ b/src/parser/grammar/types.rs
@@ -7,6 +7,7 @@ pub(super) fn type_(p: &mut Parser) {
         STAR => pointer_type(p),
         L_BRACK => array_or_slice_type(p),
         AMPERSAND => reference_type(p),
+        UNDERSCORE => placeholder_type(p),
         IDENT => path_type(p),
         _ => {
             p.error("expected type");
@@ -130,6 +131,15 @@ fn reference_type(p: &mut Parser) {
     m.complete(p, REFERENCE_TYPE);
 }
 
+// test placeholder_type
+// type Placeholder = _;
+fn placeholder_type(p: &mut Parser) {
+    assert!(p.at(UNDERSCORE));
+    let m = p.start();
+    p.bump();
+    m.complete(p, PLACEHOLDER_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 597550a32..73539d6d4 100644
--- a/src/syntax_kinds.rs
+++ b/src/syntax_kinds.rs
@@ -107,6 +107,7 @@ pub enum SyntaxKind {
     ARRAY_TYPE,
     SLICE_TYPE,
     REFERENCE_TYPE,
+    PLACEHOLDER_TYPE,
     EXTERN_BLOCK,
     ENUM_VARIANT,
     NAMED_FIELD,
@@ -240,6 +241,7 @@ impl SyntaxKind {
             ARRAY_TYPE => &SyntaxInfo { name: "ARRAY_TYPE" },
             SLICE_TYPE => &SyntaxInfo { name: "SLICE_TYPE" },
             REFERENCE_TYPE => &SyntaxInfo { name: "REFERENCE_TYPE" },
+            PLACEHOLDER_TYPE => &SyntaxInfo { name: "PLACEHOLDER_TYPE" },
             EXTERN_BLOCK => &SyntaxInfo { name: "EXTERN_BLOCK" },
             ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },
-- 
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