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# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class Dart < RegexLexer
title "Dart"
desc "The Dart programming language (dart.dev)"
tag 'dart'
filenames '*.dart'
mimetypes 'text/x-dart'
keywords = %w(
as assert await break case catch continue default do else finally for if
in is new rethrow return super switch this throw try while when with yield
)
declarations = %w(
abstract base async dynamic const covariant external extends factory final get implements
interface late native on operator required sealed set static sync typedef var
)
types = %w(bool Comparable double Dynamic enum Function int List Map Never Null num Object Pattern Record Set String Symbol Type Uri void)
imports = %w(import deferred export library part\s*of part source)
id = /[a-zA-Z_]\w*/
state :root do
rule %r(^
(\s*(?:[a-zA-Z_][a-zA-Z\d_.\[\]]*\s+)+?) # return arguments
([a-zA-Z_]\w*) # method name
(\s*)(\() # signature start
)mx do |m|
# TODO: do this better, this shouldn't need a delegation
delegate Dart, m[1]
token Name::Function, m[2]
token Text, m[3]
token Punctuation, m[4]
end
rule %r/\s+/, Text
rule %r(//.*?$), Comment::Single
rule %r(/\*.*?\*/)m, Comment::Multiline
rule %r/"/, Str, :dqs
rule %r/'/, Str, :sqs
rule %r/r"[^"]*"/, Str::Other
rule %r/r'[^']*'/, Str::Other
rule %r/##{id}*/i, Str::Symbol
rule %r/@#{id}/, Name::Decorator
rule %r/(?:#{keywords.join('|')})\b/, Keyword
rule %r/(?:#{declarations.join('|')})\b/, Keyword::Declaration
rule %r/(?:#{types.join('|')})\b/, Keyword::Type
rule %r/(?:true|false|null)\b/, Keyword::Constant
rule %r/(?:class|mixin)\b/, Keyword::Declaration, :class
rule %r/(?:#{imports.join('|')})\b/, Keyword::Namespace, :import
rule %r/(\.)(#{id})/ do
groups Operator, Name::Attribute
end
rule %r/#{id}:/, Name::Label
rule %r/\$?#{id}/, Name
rule %r/[~^*!%&\|+=:\/?-]/, Operator
rule %r/[\[\](){}<>\.,;]/, Punctuation
rule %r/\d*\.\d+([eE]\-?\d+)?/, Num::Float
rule %r/0x[\da-fA-F]+/, Num::Hex
rule %r/\d+L?/, Num::Integer
rule %r/\n/, Text
end
state :class do
rule %r/\s+/m, Text
rule id, Name::Class, :pop!
end
state :dqs do
rule %r/"/, Str, :pop!
rule %r/[^\\\$"]+/, Str
mixin :string
end
state :sqs do
rule %r/'/, Str, :pop!
rule %r/[^\\\$']+/, Str
mixin :string
end
state :import do
rule %r/;/, Operator, :pop!
rule %r/(?:show|hide)\b/, Keyword::Declaration
mixin :root
end
state :string do
mixin :interpolation
rule %r/\\[nrt\"\'\\]/, Str::Escape
end
state :interpolation do
rule %r/\$#{id}/, Str::Interpol
rule %r/\$\{[^\}]+\}/, Str::Interpol
end
end
end
end
|
