SIP-64 support

grammar.js

@@ -1,8 +1,9 @@
 const PREC = {
   comment: 1,
   using_directive: 2,
   control: 1,
   stable_type_id: 2,
+  type: 2,
   while: 2,
   assign: 3,
   case: 3,
@@ -98,8 +99,12 @@
     [$._simple_expression, $._type_identifier],
     // 'if'  parenthesized_expression  •  '{'  …
     [$._if_condition, $._simple_expression],
-    // _postfix_expression_choice  ':'  '('  wildcard  •  ':'  …
-    [$.binding, $._simple_type],
+    [$.block, $._braced_template_body1],
+    [$._simple_expression, $.self_type, $._type_identifier],
+    [$._simple_expression, $._type_identifier],
+    [$.lambda_expression, $.self_type, $._type_identifier],
+    [$.lambda_expression, $._type_identifier],
+    [$.binding, $._simple_expression, $._type_identifier],
   ],
 
   word: $ => $._alpha_identifier,
@@ -369,7 +374,7 @@
         field("bound", optional($.lower_bound)),
         field("bound", optional($.upper_bound)),
         field("bound", optional(repeat($.view_bound))),
-        field("bound", optional(repeat($.context_bound))),
+        field("bound", optional($._context_bounds)),
       ),
 
     upper_bound: $ => seq("<:", field("type", $._type)),
@@ -378,7 +383,26 @@
 
     view_bound: $ => seq("<%", field("type", $._type)),
 
-    context_bound: $ => seq(":", field("type", $._type)),
+    _context_bounds: $ => choice(
+      repeat1(seq(
+        ":",
+        $.context_bound
+      )),
+      seq(
+        ":",
+        "{",
+        trailingCommaSep1($.context_bound),
+        "}",
+      )
+    ),
+
+    context_bound: $ => seq(
+      field("type", $._type),
+      optional(seq(
+        "as",
+        field("name", $._identifier),
+      )),
+    ),
 
     /*
      * TemplateBody      ::=  :<<< [SelfType] TemplateStat {semi TemplateStat} >>>
@@ -525,6 +549,7 @@
           field("type_parameters", optional($.type_parameters)),
           field("bound", optional($.lower_bound)),
           field("bound", optional($.upper_bound)),
+          field("bound", optional($._context_bounds)),
         ),
       ),
 
@@ -602,6 +627,7 @@
           optional($.modifiers),
           "given",
           optional($._given_constructor),
+          repeat($._given_sig),
           choice(
             field("return_type", $._structural_instance),
             seq(
@@ -612,6 +638,14 @@
         ),
       ),
 
+    _given_sig: $ =>
+      seq(
+        $._given_conditional,
+        "=>"
+      ),
+
+    _given_conditional: $ => alias($.parameters, $.given_conditional),
+
     _given_constructor: $ =>
       prec.right(
         seq(
@@ -634,7 +668,10 @@
         PREC.compound,
         seq(
           $._constructor_application,
-          "with",
+          choice(
+            ":",
+            "with"
+          ),
           field("body", $.with_template_body),
         ),
       ),
@@ -851,15 +888,18 @@
     annotated_type: $ => prec.right(seq($._simple_type, repeat1($.annotation))),
 
     _simple_type: $ =>
-      choice(
-        $.generic_type,
-        $.projected_type,
-        $.tuple_type,
-        $.named_tuple_type,
-        $.singleton_type,
-        $.stable_type_identifier,
-        $._type_identifier,
-        $.wildcard,
+      prec.left(
+        PREC.type,
+        choice(
+          $.generic_type,
+          $.projected_type,
+          $.tuple_type,
+          $.named_tuple_type,
+          $.singleton_type,
+          $.stable_type_identifier,
+          $._type_identifier,
+          $.wildcard,
+        )
       ),
 
     compound_type: $ =>
@@ -914,7 +954,7 @@
         ),
       ),
 
     tuple_type: $ => seq("(", trailingCommaSep1($._type), ")"),
 
     named_tuple_type: $ => seq(
       "(",
@@ -1562,7 +1602,8 @@
         $.string,
       ),
 
-    literal_type: $ => $._non_null_literal,
+    literal_type: $ =>
+      prec.left(PREC.type, $._non_null_literal),
 
     literal: $ => choice($._non_null_literal, $.null_literal),
 

test/corpus/definitions.txt

@@ -1027,6 +1027,25 @@ class A {
         (type_parameters
           (identifier))))))
 
+================================================================================
+Type definitions (Scala 3 syntax)
+================================================================================
+
+class A:
+  type Element: Order
+
+--------------------------------------------------------------------------------
+
+(compilation_unit
+  (class_definition
+    (identifier)
+    (template_body
+      (type_definition
+        (type_identifier)
+        (context_bound
+          (type_identifier))))))
+
+
 ================================================================================
 Function declarations
 ================================================================================
@@ -1290,6 +1309,9 @@ object A:
   given intFoo: CanFoo[Int] with
     def foo(x: Int): Int = 0
 
+  given intFoo: CanFoo[Int]:
+    def foo(x: Int): Int = 0
+
   given CanFoo[Int] with
     def foo(x: Int): Int = 0
 
@@ -1317,6 +1339,8 @@ object A:
   trait B:
     given c: Context[T]
 
+  given (config: Config) => Factory = ConcreteFactory()
+
 --------------------------------------------------------------------------------
 
 (compilation_unit
@@ -1342,6 +1366,21 @@ object A:
                 (type_identifier)))
             (type_identifier)
             (integer_literal))))
+      (given_definition
+        (identifier)
+        (generic_type
+          (type_identifier)
+          (type_arguments
+            (type_identifier)))
+        (with_template_body
+          (function_definition
+            (identifier)
+            (parameters
+              (parameter
+                (identifier)
+                (type_identifier)))
+            (type_identifier)
+            (integer_literal))))
       (given_definition
         (generic_type
           (type_identifier)
@@ -1464,7 +1503,16 @@ object A:
             (generic_type
               (type_identifier)
               (type_arguments
-                (type_identifier)))))))))
+              (type_identifier))))))
+          (given_definition
+            (given_conditional
+              (parameter
+                (identifier)
+                (type_identifier)))
+            (type_identifier)
+            (call_expression
+              (identifier)
+              (arguments))))))
 
 ================================================================================
 Top-level Definitions (Scala 3 syntax)

test/corpus/types.txt

@@ -426,6 +426,51 @@ class A[B : C : D]
       (context_bound
         (type_identifier)))))
 
+================================================================================
+Context bound (Scala 3 syntax)
+================================================================================
+
+def reduce[A : Monoid as m](xs: List[A]): A = ()
+
+def showMax[X : {Ordering, Show}](x: X, y: X): String = ()
+
+--------------------------------------------------------------------------------
+
+(compilation_unit
+  (function_definition
+    (identifier)
+    (type_parameters
+      (identifier)
+      (context_bound
+        (type_identifier)
+        (identifier)))
+    (parameters
+      (parameter
+        (identifier)
+        (generic_type
+          (type_identifier)
+          (type_arguments
+            (type_identifier)))))
+    (type_identifier)
+    (unit))
+  (function_definition
+    (identifier)
+    (type_parameters
+      (identifier)
+      (context_bound
+        (type_identifier))
+      (context_bound
+        (type_identifier)))
+    (parameters
+      (parameter
+        (identifier)
+        (type_identifier))
+      (parameter
+        (identifier)
+        (type_identifier)))
+    (type_identifier)
+    (unit)))
+
 ================================================================================
 Projections
 ================================================================================