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; Keywords
[
"alias"
"and"
"begin"
"break"
"case"
"class"
"def"
"do"
"else"
"elsif"
"end"
"ensure"
"for"
"if"
"in"
"module"
"next"
"or"
"rescue"
"retry"
"return"
"then"
"unless"
"until"
"when"
"while"
"yield"
] @keyword
((identifier) @keyword
(#match? @keyword "^(private|protected|public)$"))
; Function calls
((identifier) @function.method.builtin
(#eq? @function.method.builtin "require"))
"defined?" @function.method.builtin
(call
method: [(identifier) (constant)] @function.method)
; Function definitions
(alias (identifier) @function.method)
(setter (identifier) @function.method)
(method name: [(identifier) (constant)] @function.method)
(singleton_method name: [(identifier) (constant)] @function.method)
; Identifiers
[
(class_variable)
(instance_variable)
] @variable.other.member
((identifier) @constant.builtin
(#match? @constant.builtin "^__(FILE|LINE|ENCODING)__$"))
((constant) @constant
(#match? @constant "^[A-Z\\d_]+$"))
(constant) @constructor
(self) @variable.builtin
(super) @variable.builtin
(block_parameter (identifier) @variable.parameter)
(block_parameters (identifier) @variable.parameter)
(destructured_parameter (identifier) @variable.parameter)
(hash_splat_parameter (identifier) @variable.parameter)
(lambda_parameters (identifier) @variable.parameter)
(method_parameters (identifier) @variable.parameter)
(splat_parameter (identifier) @variable.parameter)
(keyword_parameter name: (identifier) @variable.parameter)
(optional_parameter name: (identifier) @variable.parameter)
((identifier) @function.method
(#is-not? local))
(identifier) @variable
; Literals
[
(string)
(bare_string)
(subshell)
(heredoc_body)
(heredoc_beginning)
] @string
[
(simple_symbol)
(delimited_symbol)
(hash_key_symbol)
(bare_symbol)
] @string.special.symbol
(regex) @string.regexp
(escape_sequence) @constant.character.escape
[
(integer)
(float)
] @constant.numeric.integer
[
(nil)
(true)
(false)
]@constant.builtin
(interpolation
"#{" @punctuation.special
"}" @punctuation.special) @embedded
(comment) @comment
; Operators
[
"="
"=>"
"->"
] @operator
[
","
";"
"."
] @punctuation.delimiter
[
"("
")"
"["
"]"
"{"
"}"
"%w("
"%i("
] @punctuation.bracket
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