rf-web/vendor/bundle/gems/rouge-3.12.0/lib/rouge/lexers/ruby.rb
2019-10-21 10:18:17 +02:00

442 lines
13 KiB
Ruby

# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class Ruby < RegexLexer
title "Ruby"
desc "The Ruby programming language (ruby-lang.org)"
tag 'ruby'
aliases 'rb'
filenames '*.rb', '*.ruby', '*.rbw', '*.rake', '*.gemspec', '*.podspec',
'Rakefile', 'Guardfile', 'Gemfile', 'Capfile', 'Podfile',
'Vagrantfile', '*.ru', '*.prawn', 'Berksfile', '*.arb',
'Dangerfile', 'Fastfile', 'Deliverfile', 'Appfile'
mimetypes 'text/x-ruby', 'application/x-ruby'
def self.detect?(text)
return true if text.shebang? 'ruby'
end
state :symbols do
# symbols
rule %r(
: # initial :
@{0,2} # optional ivar, for :@foo and :@@foo
[a-z_]\w*[!?]? # the symbol
)xi, Str::Symbol
# special symbols
rule %r(:(?:\*\*|[-+]@|[/\%&\|^`~]|\[\]=?|<<|>>|<=?>|<=?|===?)),
Str::Symbol
rule %r/:'(\\\\|\\'|[^'])*'/, Str::Symbol
rule %r/:"/, Str::Symbol, :simple_sym
end
state :sigil_strings do
# %-sigiled strings
# %(abc), %[abc], %<abc>, %.abc., %r.abc., etc
delimiter_map = { '{' => '}', '[' => ']', '(' => ')', '<' => '>' }
rule %r/%([rqswQWxiI])?([^\w\s])/ do |m|
open = Regexp.escape(m[2])
close = Regexp.escape(delimiter_map[m[2]] || m[2])
interp = /[rQWxI]/ === m[1]
toktype = Str::Other
puts " open: #{open.inspect}" if @debug
puts " close: #{close.inspect}" if @debug
# regexes
if m[1] == 'r'
toktype = Str::Regex
push :regex_flags
end
token toktype
push do
uniq_chars = "#{open}#{close}".squeeze
uniq_chars = '' if open == close && open == "\\#"
rule %r/\\[##{uniq_chars}\\]/, Str::Escape
# nesting rules only with asymmetric delimiters
if open != close
rule %r/#{open}/ do
token toktype
push
end
end
rule %r/#{close}/, toktype, :pop!
if interp
mixin :string_intp_escaped
rule %r/#/, toktype
else
rule %r/[\\#]/, toktype
end
rule %r/[^##{uniq_chars}\\]+/m, toktype
end
end
end
state :strings do
mixin :symbols
rule %r/\b[a-z_]\w*?[?!]?:\s+/, Str::Symbol, :expr_start
rule %r/'(\\\\|\\'|[^'])*'/, Str::Single
rule %r/"/, Str::Double, :simple_string
rule %r/(?<!\.)`/, Str::Backtick, :simple_backtick
end
state :regex_flags do
rule %r/[mixounse]*/, Str::Regex, :pop!
end
# double-quoted string and symbol
[[:string, Str::Double, '"'],
[:sym, Str::Symbol, '"'],
[:backtick, Str::Backtick, '`']].each do |name, tok, fin|
state :"simple_#{name}" do
mixin :string_intp_escaped
rule %r/[^\\#{fin}#]+/m, tok
rule %r/[\\#]/, tok
rule %r/#{fin}/, tok, :pop!
end
end
keywords = %w(
BEGIN END alias begin break case defined\? do else elsif end
ensure for if in next redo rescue raise retry return super then
undef unless until when while yield
)
keywords_pseudo = %w(
loop include extend raise
alias_method attr catch throw private module_function
public protected true false nil __FILE__ __LINE__
)
builtins_g = %w(
attr_reader attr_writer attr_accessor
__id__ __send__ abort ancestors at_exit autoload binding callcc
caller catch chomp chop class_eval class_variables clone
const_defined\? const_get const_missing const_set constants
display dup eval exec exit extend fail fork format freeze
getc gets global_variables gsub hash id included_modules
inspect instance_eval instance_method instance_methods
instance_variable_get instance_variable_set instance_variables
lambda load local_variables loop method method_missing
methods module_eval name object_id open p print printf
private_class_method private_instance_methods private_methods proc
protected_instance_methods protected_methods public_class_method
public_instance_methods public_methods putc puts raise rand
readline readlines require require_relative scan select self send set_trace_func
singleton_methods sleep split sprintf srand sub syscall system
taint test throw to_a to_s trace_var trap untaint untrace_var warn
)
builtins_q = %w(
autoload block_given const_defined eql equal frozen
include instance_of is_a iterator kind_of method_defined
nil private_method_defined protected_method_defined
public_method_defined respond_to tainted
)
builtins_b = %w(chomp chop exit gsub sub)
start do
push :expr_start
@heredoc_queue = []
end
state :whitespace do
mixin :inline_whitespace
rule %r/\n\s*/m, Text, :expr_start
rule %r/#.*$/, Comment::Single
rule %r(=begin\b.*?\n=end\b)m, Comment::Multiline
end
state :inline_whitespace do
rule %r/[ \t\r]+/, Text
end
state :root do
mixin :whitespace
rule %r/__END__/, Comment::Preproc, :end_part
rule %r/0_?[0-7]+(?:_[0-7]+)*/, Num::Oct
rule %r/0x[0-9A-Fa-f]+(?:_[0-9A-Fa-f]+)*/, Num::Hex
rule %r/0b[01]+(?:_[01]+)*/, Num::Bin
rule %r/\d+\.\d+(e[\+\-]?\d+)?/, Num::Float
rule %r/[\d]+(?:_\d+)*/, Num::Integer
# names
rule %r/@@[a-z_]\w*/i, Name::Variable::Class
rule %r/@[a-z_]\w*/i, Name::Variable::Instance
rule %r/\$\w+/, Name::Variable::Global
rule %r(\$[!@&`'+~=/\\,;.<>_*\$?:"]), Name::Variable::Global
rule %r/\$-[0adFiIlpvw]/, Name::Variable::Global
rule %r/::/, Operator
mixin :strings
rule %r/(?:#{keywords.join('|')})(?=\W|$)/, Keyword, :expr_start
rule %r/(?:#{keywords_pseudo.join('|')})\b/, Keyword::Pseudo, :expr_start
rule %r(
(module)
(\s+)
([a-zA-Z_][a-zA-Z0-9_]*(::[a-zA-Z_][a-zA-Z0-9_]*)*)
)x do
groups Keyword, Text, Name::Namespace
end
rule %r/(def\b)(\s*)/ do
groups Keyword, Text
push :funcname
end
rule %r/(class\b)(\s*)/ do
groups Keyword, Text
push :classname
end
rule %r/(?:#{builtins_q.join('|')})[?]/, Name::Builtin, :expr_start
rule %r/(?:#{builtins_b.join('|')})!/, Name::Builtin, :expr_start
rule %r/(?<!\.)(?:#{builtins_g.join('|')})\b/,
Name::Builtin, :method_call
mixin :has_heredocs
# `..` and `...` for ranges must have higher priority than `.`
# Otherwise, they will be parsed as :method_call
rule %r/\.{2,3}/, Operator, :expr_start
rule %r/[A-Z][a-zA-Z0-9_]*/, Name::Constant, :method_call
rule %r/(\.|::)(\s*)([a-z_]\w*[!?]?|[*%&^`~+-\/\[<>=])/ do
groups Punctuation, Text, Name::Function
push :method_call
end
rule %r/[a-zA-Z_]\w*[?!]/, Name, :expr_start
rule %r/[a-zA-Z_]\w*/, Name, :method_call
rule %r/\*\*|<<?|>>?|>=|<=|<=>|=~|={3}|!~|&&?|\|\||\./,
Operator, :expr_start
rule %r/[-+\/*%=<>&!^|~]=?/, Operator, :expr_start
rule(/[?]/) { token Punctuation; push :ternary; push :expr_start }
rule %r<[\[({,:\\;/]>, Punctuation, :expr_start
rule %r<[\])}]>, Punctuation
end
state :has_heredocs do
rule %r/(?<!\w)(<<[-~]?)(["`']?)([a-zA-Z_]\w*)(\2)/ do |m|
token Operator, m[1]
token Name::Constant, "#{m[2]}#{m[3]}#{m[4]}"
@heredoc_queue << [['<<-', '<<~'].include?(m[1]), m[3]]
push :heredoc_queue unless state? :heredoc_queue
end
rule %r/(<<[-~]?)(["'])(\2)/ do |m|
token Operator, m[1]
token Name::Constant, "#{m[2]}#{m[3]}#{m[4]}"
@heredoc_queue << [['<<-', '<<~'].include?(m[1]), '']
push :heredoc_queue unless state? :heredoc_queue
end
end
state :heredoc_queue do
rule %r/(?=\n)/ do
goto :resolve_heredocs
end
mixin :root
end
state :resolve_heredocs do
mixin :string_intp_escaped
rule %r/\n/, Str::Heredoc, :test_heredoc
rule %r/[#\\\n]/, Str::Heredoc
rule %r/[^#\\\n]+/, Str::Heredoc
end
state :test_heredoc do
rule %r/[^#\\\n]*$/ do |m|
tolerant, heredoc_name = @heredoc_queue.first
check = tolerant ? m[0].strip : m[0].rstrip
# check if we found the end of the heredoc
puts " end heredoc check #{check.inspect} = #{heredoc_name.inspect}" if @debug
if check == heredoc_name
@heredoc_queue.shift
# if there's no more, we're done looking.
pop! if @heredoc_queue.empty?
token Name::Constant
else
token Str::Heredoc
end
pop!
end
rule(//) { pop! }
end
state :funcname do
rule %r/\s+/, Text
rule %r/\(/, Punctuation, :defexpr
rule %r(
(?:([a-zA-Z_]\w*)(\.))?
(
[a-zA-Z_]\w*[!?]? |
\*\*? | [-+]@? | [/%&\|^`~] | \[\]=? |
<<? | >>? | <=>? | >= | ===?
)
)x do |m|
puts "matches: #{[m[0], m[1], m[2], m[3]].inspect}" if @debug
groups Name::Class, Operator, Name::Function
pop!
end
rule(//) { pop! }
end
state :classname do
rule %r/\s+/, Text
rule %r/\(/ do
token Punctuation
push :defexpr
push :expr_start
end
# class << expr
rule %r/<</ do
token Operator
goto :expr_start
end
rule %r/[A-Z_]\w*/, Name::Class, :pop!
rule(//) { pop! }
end
state :ternary do
rule(/:(?!:)/) { token Punctuation; goto :expr_start }
mixin :root
end
state :defexpr do
rule %r/(\))(\.|::)?/ do
groups Punctuation, Operator
pop!
end
rule %r/\(/ do
token Punctuation
push :defexpr
push :expr_start
end
mixin :root
end
state :in_interp do
rule %r/}/, Str::Interpol, :pop!
mixin :root
end
state :string_intp do
rule %r/[#][{]/, Str::Interpol, :in_interp
rule %r/#(@@?|\$)[a-z_]\w*/i, Str::Interpol
end
state :string_intp_escaped do
mixin :string_intp
rule %r/\\([\\abefnrstv#"']|x[a-fA-F0-9]{1,2}|[0-7]{1,3})/,
Str::Escape
rule %r/\\./, Str::Escape
end
state :method_call do
rule %r(/) do
token Operator
goto :expr_start
end
rule(/(?=\n)/) { pop! }
rule(//) { goto :method_call_spaced }
end
state :method_call_spaced do
mixin :whitespace
rule %r([%/]=) do
token Operator
goto :expr_start
end
rule %r((/)(?=\S|\s*/)) do
token Str::Regex
goto :slash_regex
end
mixin :sigil_strings
rule(%r((?=\s*/))) { pop! }
rule(/\s+/) { token Text; goto :expr_start }
rule(//) { pop! }
end
state :expr_start do
mixin :inline_whitespace
rule %r(/) do
token Str::Regex
goto :slash_regex
end
# char operator. ?x evaulates to "x", unless there's a digit
# beforehand like x>=0?n[x]:""
rule %r(
[?](\\[MC]-)* # modifiers
(\\([\\abefnrstv\#"']|x[a-fA-F0-9]{1,2}|[0-7]{1,3})|\S)
(?!\w)
)x, Str::Char, :pop!
# special case for using a single space. Ruby demands that
# these be in a single line, otherwise it would make no sense.
rule %r/(\s*)(%[rqswQWxiI]? \S* )/ do
groups Text, Str::Other
pop!
end
mixin :sigil_strings
rule(//) { pop! }
end
state :slash_regex do
mixin :string_intp
rule %r(\\\\), Str::Regex
rule %r(\\/), Str::Regex
rule %r([\\#]), Str::Regex
rule %r([^\\/#]+)m, Str::Regex
rule %r(/) do
token Str::Regex
goto :regex_flags
end
end
state :end_part do
# eat up the rest of the stream as Comment::Preproc
rule %r/.+/m, Comment::Preproc, :pop!
end
end
end
end