G: slice & array types

grammar.ron

@@ -106,6 +106,8 @@ Grammar(
         "NEVER_TYPE",
         "PATH_TYPE",
         "POINTER_TYPE",
+        "ARRAY_TYPE",
+        "SLICE_TYPE",
 
         "EXTERN_BLOCK",
         "ENUM_VARIANT",

src/parser/grammar/types.rs

@@ -5,6 +5,7 @@ pub(super) fn type_(p: &mut Parser) {
         L_PAREN => paren_or_tuple_type(p),
         EXCL => never_type(p),
         STAR => pointer_type(p),
+        L_BRACK => array_or_slice_type(p),
         IDENT => path_type(p),
         _ => {
             p.error("expected type");
@@ -82,6 +83,38 @@ fn pointer_type(p: &mut Parser) {
     m.complete(p, POINTER_TYPE);
 }
 
+fn array_or_slice_type(p: &mut Parser) {
+    assert!(p.at(L_BRACK));
+    let m = p.start();
+    p.bump();
+
+    type_(p);
+    let kind = match p.current() {
+        // test slice_type
+        // type T = [()];
+        R_BRACK => {
+            p.bump();
+            SLICE_TYPE
+        },
+
+        // test array_type
+        // type T = [(); 92];
+        SEMI => {
+            p.bump();
+            expressions::expr(p);
+            p.expect(R_BRACK);
+            ARRAY_TYPE
+        }
+        // test array_type_missing_semi
+        // type T = [() 92];
+        _ => {
+            p.error("expected `;` or `]`");
+            SLICE_TYPE
+        }
+    };
+    m.complete(p, kind);
+}
+
 fn path_type(p: &mut Parser) {
     assert!(p.at(IDENT));
     let m = p.start();

src/syntax_kinds.rs

@@ -104,6 +104,8 @@ pub enum SyntaxKind {
     NEVER_TYPE,
     PATH_TYPE,
     POINTER_TYPE,
+    ARRAY_TYPE,
+    SLICE_TYPE,
     EXTERN_BLOCK,
     ENUM_VARIANT,
     NAMED_FIELD,
@@ -234,6 +236,8 @@ pub(crate) fn info(self) -> &'static SyntaxInfo {
             NEVER_TYPE => &SyntaxInfo { name: "NEVER_TYPE" },
             PATH_TYPE => &SyntaxInfo { name: "PATH_TYPE" },
             POINTER_TYPE => &SyntaxInfo { name: "POINTER_TYPE" },
+            ARRAY_TYPE => &SyntaxInfo { name: "ARRAY_TYPE" },
+            SLICE_TYPE => &SyntaxInfo { name: "SLICE_TYPE" },
             EXTERN_BLOCK => &SyntaxInfo { name: "EXTERN_BLOCK" },
             ENUM_VARIANT => &SyntaxInfo { name: "ENUM_VARIANT" },
             NAMED_FIELD => &SyntaxInfo { name: "NAMED_FIELD" },

tests/data/parser/inline/0023_array_type_missing_semi.rs

@@ -0,0 +1 @@
+type T = [() 92];

tests/data/parser/inline/0023_array_type_missing_semi.txt

@@ -0,0 +1,28 @@
+FILE@[0; 18)
+  TYPE_ITEM@[0; 13)
+    TYPE_KW@[0; 4)
+    NAME@[4; 7)
+      WHITESPACE@[4; 5)
+      IDENT@[5; 6) "T"
+      WHITESPACE@[6; 7)
+    EQ@[7; 8)
+    SLICE_TYPE@[8; 13)
+      WHITESPACE@[8; 9)
+      L_BRACK@[9; 10)
+      TUPLE_TYPE@[10; 13)
+        L_PAREN@[10; 11)
+        R_PAREN@[11; 12)
+        WHITESPACE@[12; 13)
+      err: `expected `;` or `]``
+    err: `expected SEMI`
+  ERROR@[13; 15)
+  err: `expected item`
+    INT_NUMBER@[13; 15)
+  ERROR@[15; 16)
+  err: `expected item`
+    R_BRACK@[15; 16)
+  ERROR@[16; 18)
+  err: `expected item, found `;`
+consider removing this semicolon`
+    SEMI@[16; 17)
+    WHITESPACE@[17; 18)

tests/data/parser/inline/0024_array_type.rs

@@ -0,0 +1 @@
+type T = [(); 92];

tests/data/parser/inline/0024_array_type.txt

@@ -0,0 +1,21 @@
+FILE@[0; 19)
+  TYPE_ITEM@[0; 19)
+    TYPE_KW@[0; 4)
+    NAME@[4; 7)
+      WHITESPACE@[4; 5)
+      IDENT@[5; 6) "T"
+      WHITESPACE@[6; 7)
+    EQ@[7; 8)
+    ARRAY_TYPE@[8; 17)
+      WHITESPACE@[8; 9)
+      L_BRACK@[9; 10)
+      TUPLE_TYPE@[10; 12)
+        L_PAREN@[10; 11)
+        R_PAREN@[11; 12)
+      SEMI@[12; 13)
+      LITERAL@[13; 16)
+        WHITESPACE@[13; 14)
+        INT_NUMBER@[14; 16)
+      R_BRACK@[16; 17)
+    SEMI@[17; 18)
+    WHITESPACE@[18; 19)

tests/data/parser/inline/0025_slice_type.rs

@@ -0,0 +1 @@
+type T = [()];

tests/data/parser/inline/0025_slice_type.txt

@@ -0,0 +1,17 @@
+FILE@[0; 15)
+  TYPE_ITEM@[0; 15)
+    TYPE_KW@[0; 4)
+    NAME@[4; 7)
+      WHITESPACE@[4; 5)
+      IDENT@[5; 6) "T"
+      WHITESPACE@[6; 7)
+    EQ@[7; 8)
+    SLICE_TYPE@[8; 13)
+      WHITESPACE@[8; 9)
+      L_BRACK@[9; 10)
+      TUPLE_TYPE@[10; 12)
+        L_PAREN@[10; 11)
+        R_PAREN@[11; 12)
+      R_BRACK@[12; 13)
+    SEMI@[13; 14)
+    WHITESPACE@[14; 15)