[C#] support class definitions without a body

C#/C#.sublime-syntax

@@ -446,12 +446,7 @@ contexts:
     - match: \s*(;)
       captures:
         1: punctuation.terminator.statement.cs
-      pop: true
-
-  maybe_terminator:
-    - include: terminator
-    - match: (?=\S)
-      pop: true
+      pop: 1
 
   delegate_end:
     - include: terminator
@@ -477,6 +472,7 @@ contexts:
 
   class_signature:
     - meta_scope: meta.class.cs
+    - include: terminator
     - match: (?=\S)
       set: class_body
 
@@ -517,21 +513,24 @@ contexts:
   data_type_expect_block:
     - match: \{
       scope: punctuation.section.block.begin.cs
-      push:
-        - meta_scope: meta.block.cs
-        - match: \}
-          scope: punctuation.section.block.end.cs
-          pop: 2
-        - include: attribute
-        - include: class_declaration
-        - include: interface_declaration
-        - include: delegate_declaration
-        - include: method_declaration
-        - include: stray_close_bracket
+      push: data_type_inside_block
+    - include: terminator
     - match: \S*
       scope: invalid.illegal.cs
       pop: true
 
+  data_type_inside_block:
+    - meta_scope: meta.block.cs
+    - match: \}
+      scope: punctuation.section.block.end.cs
+      pop: 2
+    - include: attribute
+    - include: class_declaration
+    - include: interface_declaration
+    - include: delegate_declaration
+    - include: method_declaration
+    - include: stray_close_bracket
+
   data_type_parameter:
     - match: '<'
       scope: meta.generic.cs punctuation.definition.generic.begin.cs
@@ -555,8 +554,7 @@ contexts:
     - match: '{{name}}'
       scope: entity.other.inherited-class.cs
       push:
-        - maybe_terminator
-        - maybe_constructor_parameters
+        - function_call_begin_paren
     - include: type
 
   type_constraint_common:
@@ -800,17 +798,19 @@ contexts:
     - include: attribute
     - include: lambdas
 
-    - match: (?=[^\s\[])
-      set:
-      - match: '\s*\b(out|ref|this|params|in)\s+'
-        captures:
-          1: storage.modifier.parameter.cs
-      - match: \s
-        pop: true
-      - include: type
+    - match: (?=[^\s\[;])
+      set: method_param_type_modifier
     - match: (?=\}|\)|>|\]|;)
       pop: true
 
+  method_param_type_modifier:
+    - match: '\s*\b(out|ref|this|params|in)\s+'
+      captures:
+        1: storage.modifier.parameter.cs
+    - match: \s
+      pop: true
+    - include: type
+
   constructor_prebody:
     - meta_scope: meta.method.constructor.cs
     - match: ':'
@@ -1572,15 +1572,17 @@ contexts:
   type_tuple:
     - match: \(
       scope: punctuation.section.sequence.begin.cs
-      set:
-        - meta_scope: meta.sequence.tuple.cs
-        - match: \)
-          scope: punctuation.section.sequence.end.cs
-          pop: true
-        - match: ','
-          scope: punctuation.separator.sequence.cs
-        - match: (?=\S)
-          push: var_declaration_explicit
+      set: type_tuple_content
+
+  type_tuple_content:
+    - meta_scope: meta.sequence.tuple.cs
+    - match: \)
+      scope: punctuation.section.sequence.end.cs
+      pop: true
+    - match: ','
+      scope: punctuation.separator.sequence.cs
+    - match: (?=\S)
+      push: var_declaration_explicit
 
   type_common:
     - include: namespace_variables

C#/tests/syntax_test_C#12.cs

@@ -0,0 +1,40 @@
+/// SYNTAX TEST "Packages/C#/C#.sublime-syntax"
+
+public class InvalidException(string _message) : Exception(_message);
+///^^^ storage.modifier.access.cs
+///    ^^^^^^^^^^^^^^^^^^^^^^ meta.class.cs
+///    ^^^^^ keyword.declaration.class.cs
+///          ^^^^^^^^^^^^^^^^ entity.name.class.cs
+///                          ^^^^^^^^^^^^^^^^^ meta.class.constructor.parameters.cs
+///                          ^ punctuation.section.parameters.begin.cs
+///                           ^^^^^^ storage.type.cs
+///                                  ^^^^^^^^ variable.parameter.cs
+///                                          ^ punctuation.section.parameters.end.cs
+///                                           ^^^^^^^^^^^^^^^^^^^^^^^ meta.class.cs
+///                                            ^ punctuation.separator.type.cs
+///                                              ^^^^^^^^^ entity.other.inherited-class.cs
+///                                                       ^^^^^^^^^^ meta.function-call.cs meta.group.cs
+///                                                       ^ punctuation.section.group.begin.cs
+///                                                        ^^^^^^^^ variable.other.cs
+///                                                                ^ punctuation.section.group.end.cs
+///                                                                 ^ punctuation.terminator.statement.cs
+///                                                                  ^ - meta.class
+
+public class NotFoundException(string _message) : Exception(_message);
+///^^^ storage.modifier.access.cs
+///    ^^^^^^^^^^^^^^^^^^^^^^^ meta.class.cs
+///    ^^^^^ keyword.declaration.class.cs
+///          ^^^^^^^^^^^^^^^^^ entity.name.class.cs
+///                           ^^^^^^^^^^^^^^^^^ meta.class.constructor.parameters.cs
+///                           ^ punctuation.section.parameters.begin.cs
+///                            ^^^^^^ storage.type.cs
+///                                   ^^^^^^^^ variable.parameter.cs
+///                                           ^ punctuation.section.parameters.end.cs
+///                                            ^^^^^^^^^^^^^^^^^^^^^^^ meta.class.cs
+///                                             ^ punctuation.separator.type.cs
+///                                               ^^^^^^^^^ entity.other.inherited-class.cs
+///                                                        ^^^^^^^^^^ meta.function-call.cs meta.group.cs
+///                                                        ^ punctuation.section.group.begin.cs
+///                                                         ^^^^^^^^ variable.other.cs
+///                                                                 ^ punctuation.section.group.end.cs
+///                                                                  ^ punctuation.terminator.statement.cs

C#/tests/syntax_test_C#8.cs

@@ -323,7 +323,7 @@ namespace CommonTests.Attributes;
 [AttributeUsage(AttributeTargets.Method)]
 public class CustomAutoDataAttribute() : AutoDataAttribute(
     () =>
-///^^^^^^ meta.class.constructor.parameters.cs
+///^^^^^^^ meta.class.cs meta.function-call.cs meta.group.cs
 /// ^^^^^ meta.function.anonymous.cs meta.group.cs
 /// ^ punctuation.section.group.begin.cs
 ///  ^ meta.group.cs punctuation.section.group.end.cs
@@ -333,8 +333,8 @@ public class CustomAutoDataAttribute() : AutoDataAttribute(
         fixture.Customizations.Add(new DateOnlySpecimenBuilder());
         return fixture;
     });
-///^^^ meta.class.constructor.parameters.cs
+///^^^ meta.class.cs meta.function-call.cs meta.group.cs
 /// ^ punctuation.section.block.end.cs
-///  ^ punctuation.section.parameters.end.cs
+///  ^ punctuation.section.group.end.cs
 ///   ^ meta.class.cs punctuation.terminator.statement.cs