Enable c-sharp language and highlights (#861)

2 files changed, 248 insertions, 0 deletions

diff --git a/languages.toml b/languages.toml
index 60b996c0..67f4d3d6 100644
--- a/languages.toml
+++ b/languages.toml
@@ -75,6 +75,16 @@ language-server = { command = "clangd" }
 indent = { tab-width = 2, unit = "  " }
 
 [[language]]
+name = "c-sharp"
+scope = "source.csharp"
+injection-regex = "c-?sharp"
+file-types = ["cs"]
+roots = []
+comment-token = "//"
+
+indent = { tab-width = 4, unit = "\t" }
+
+[[language]]
 name = "go"
 scope = "source.go"
 injection-regex = "go"
diff --git a/runtime/queries/c-sharp/highlights.scm b/runtime/queries/c-sharp/highlights.scm
new file mode 100644
index 00000000..b76f4e60
--- /dev/null
+++ b/runtime/queries/c-sharp/highlights.scm
@@ -0,0 +1,238 @@
+;; Methods
+(method_declaration (identifier) @type (identifier) @function)
+
+;; Types
+(interface_declaration name: (identifier) @type)
+(class_declaration name: (identifier) @type)
+(enum_declaration name: (identifier) @type)
+(struct_declaration (identifier) @type)
+(record_declaration (identifier) @type)
+(namespace_declaration name: (identifier) @type)
+
+(constructor_declaration name: (identifier) @type)
+
+[
+  (implicit_type)
+  (nullable_type)
+  (pointer_type)
+  (function_pointer_type)
+  (predefined_type)
+] @type.builtin
+
+;; Enum
+(enum_member_declaration (identifier) @variable.property)
+
+;; Literals
+[
+  (real_literal)
+  (integer_literal)
+] @number
+
+[
+  (character_literal)
+  (string_literal)
+  (verbatim_string_literal)
+  (interpolated_string_text)
+  (interpolated_verbatim_string_text)
+  "\""
+  "$\""
+  "@$\""
+  "$@\""
+ ] @string
+
+[
+  (boolean_literal)
+  (null_literal)
+  (void_keyword)
+] @constant.builtin
+
+;; Comments
+(comment) @comment
+
+;; Tokens
+[
+  ";"
+  "."
+  ","
+] @punctuation.delimiter
+
+[
+  "--"
+  "-"
+  "-="
+  "&"
+  "&&"
+  "+"
+  "++"
+  "+="
+  "<"
+  "<<"
+  "="
+  "=="
+  "!"
+  "!="
+  "=>"
+  ">"
+  ">>"
+  "|"
+  "||"
+  "?"
+  "??"
+  "^"
+  "~"
+  "*"
+  "/"
+  "%"
+  ":"
+] @operator
+
+[
+  "("
+  ")"
+  "["
+  "]"
+  "{"
+  "}"
+]  @punctuation.bracket
+
+;; Keywords
+(modifier) @keyword
+(this_expression) @keyword
+(escape_sequence) @keyword
+
+[
+  "as"
+  "base"
+  "break"
+  "case"
+  "catch"
+  "checked"
+  "class"
+  "continue"
+  "default"
+  "delegate"
+  "do"
+  "else"
+  "enum"
+  "event"
+  "explicit"
+  "finally"
+  "for"
+  "foreach"
+  "goto"
+  "if"
+  "implicit"
+  "interface"
+  "is"
+  "lock"
+  "namespace"
+  "operator"
+  "params"
+  "return"
+  "sizeof"
+  "stackalloc"
+  "struct"
+  "switch"
+  "throw"
+  "try"
+  "typeof"
+  "unchecked"
+  "using"
+  "while"
+  "new"
+  "await"
+  "in"
+  "yield"
+  "get"
+  "set"
+  "when"
+  "out"
+  "ref"
+  "from"
+  "where"
+  "select"
+  "record"
+  "init"
+  "with"
+  "let"
+] @keyword
+
+
+;; Linq
+(from_clause (identifier) @variable)
+(group_clause)
+(order_by_clause)
+(select_clause (identifier) @variable)
+(query_continuation (identifier) @variable) @keyword
+
+;; Record
+(with_expression
+  (with_initializer_expression
+    (simple_assignment_expression
+      (identifier) @variable)))
+
+;; Exprs
+(binary_expression (identifier) @variable (identifier) @variable)
+(binary_expression (identifier)* @variable)
+(conditional_expression (identifier) @variable)
+(prefix_unary_expression (identifier) @variable)
+(postfix_unary_expression (identifier)* @variable)
+(assignment_expression (identifier) @variable)
+(cast_expression (identifier) @type (identifier) @variable)
+
+;; Class
+(base_list (identifier) @type)
+(property_declaration (generic_name))
+(property_declaration
+  type: (nullable_type) @type
+  name: (identifier) @variable)
+(property_declaration
+  type: (predefined_type) @type
+  name: (identifier) @variable)
+(property_declaration
+  type: (identifier) @type
+  name: (identifier) @variable)
+
+;; Lambda
+(lambda_expression) @variable
+
+;; Attribute
+(attribute) @type
+
+;; Parameter
+(parameter
+  type: (identifier) @type
+  name: (identifier) @variable.parameter)
+(parameter (identifier) @variable.parameter)
+(parameter_modifier) @keyword
+
+;; Typeof
+(type_of_expression (identifier) @type)
+
+;; Variable
+(variable_declaration (identifier) @type)
+(variable_declarator (identifier) @variable)
+
+;; Return
+(return_statement (identifier) @variable)
+(yield_statement (identifier) @variable)
+
+;; Type
+(generic_name (identifier) @type)
+(type_parameter (identifier) @variable.parameter)
+(type_argument_list (identifier) @type)
+
+;; Type constraints
+(type_parameter_constraints_clause (identifier) @variable.parameter)
+(type_constraint (identifier) @type)
+
+;; Exception
+(catch_declaration (identifier) @type (identifier) @variable)
+(catch_declaration (identifier) @type)
+
+;; Switch
+(switch_statement (identifier) @variable)
+(switch_expression (identifier) @variable)
+
+;; Lock statement
+(lock_statement (identifier) @variable)