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

194 lines
5.5 KiB
Ruby

# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class TCL < RegexLexer
title "Tcl"
desc "The Tool Command Language (tcl.tk)"
tag 'tcl'
filenames '*.tcl'
mimetypes 'text/x-tcl', 'text/x-script.tcl', 'application/x-tcl'
def self.detect?(text)
return true if text.shebang? 'tclsh'
return true if text.shebang? 'wish'
return true if text.shebang? 'jimsh'
end
KEYWORDS = %w(
after apply array break catch continue elseif else error
eval expr for foreach global if namespace proc rename return
set switch then trace unset update uplevel upvar variable
vwait while
)
BUILTINS = %w(
append bgerror binary cd chan clock close concat dde dict
encoding eof exec exit fblocked fconfigure fcopy file
fileevent flush format gets glob history http incr info interp
join lappend lassign lindex linsert list llength load loadTk
lrange lrepeat lreplace lreverse lsearch lset lsort mathfunc
mathop memory msgcat open package pid pkg::create pkg_mkIndex
platform platform::shell puts pwd re_syntax read refchan
regexp registry regsub scan seek socket source split string
subst tell time tm unknown unload
)
OPEN = %w| \( \[ \{ " |
CLOSE = %w| \) \] \} |
ALL = OPEN + CLOSE
END_LINE = CLOSE + %w(; \n)
END_WORD = END_LINE + %w(\r \t \v)
CHARS = lambda { |list| Regexp.new %/[#{list.join}]/ }
NOT_CHARS = lambda { |list| Regexp.new %/[^#{list.join}]/ }
state :word do
rule %r/\{\*\}/, Keyword
mixin :brace_abort
mixin :interp
rule %r/\{/, Punctuation, :brace
rule %r/\(/, Punctuation, :paren
rule %r/"/, Str::Double, :string
rule %r/#{NOT_CHARS[END_WORD]}+?(?=#{CHARS[OPEN+['\\\\']]})/, Text
end
def self.gen_command_state(name='')
state(:"command#{name}") do
mixin :word
rule %r/##{NOT_CHARS[END_LINE]}+/, Comment::Single
rule %r/(?=#{CHARS[END_WORD]})/ do
push :"params#{name}"
end
rule %r/#{NOT_CHARS[END_WORD]}+/ do |m|
if KEYWORDS.include? m[0]
token Keyword
elsif BUILTINS.include? m[0]
token Name::Builtin
else
token Text
end
end
mixin :whitespace
end
end
def self.gen_delimiter_states(name, close, opts={})
gen_command_state("_in_#{name}")
state :"params_in_#{name}" do
rule close do
token Punctuation
pop! 2
end
# mismatched delimiters. Braced strings with mismatched
# closing delimiters should be okay, since this is standard
# practice, like {]]]]}
if opts[:strict]
rule CHARS[CLOSE - [close]], Error
else
rule CHARS[CLOSE - [close]], Text
end
mixin :params
end
state name do
rule close, Punctuation, :pop!
mixin :"command_in_#{name}"
end
end
# tcl is freaking impossible. If we're in braces and we encounter
# a close brace, we have to drop everything and close the brace.
# This is so silly things like {abc"def} and {abc]def} don't b0rk
# everything after them.
# TODO: TCL seems to have this aborting behavior quite a lot.
# such things as [ abc" ] are a runtime error, but will still
# parse. Currently something like this will muck up the lex.
state :brace_abort do
rule %r/}/ do
if in_state? :brace
pop! until state? :brace
pop!
token Punctuation
else
token Error
end
end
end
state :params do
rule %r/;/, Punctuation, :pop!
rule %r/\n/, Text, :pop!
rule %r/else|elseif|then/, Keyword
mixin :word
mixin :whitespace
rule %r/#{NOT_CHARS[END_WORD]}+/, Text
end
gen_delimiter_states :brace, /\}/, :strict => false
gen_delimiter_states :paren, /\)/, :strict => true
gen_delimiter_states :bracket, /\]/, :strict => true
gen_command_state
state :root do
mixin :command
end
state :whitespace do
# not a multiline regex because we want to capture \n sometimes
rule %r/\s+/, Text
end
state :interp do
rule %r/\[/, Punctuation, :bracket
rule %r/\$[a-z0-9.:-]+/, Name::Variable
rule %r/\$\{.*?\}/m, Name::Variable
rule %r/\$/, Text
# escape sequences
rule %r/\\[0-7]{3}/, Str::Escape
rule %r/\\x[0-9a-f]{2}/i, Str::Escape
rule %r/\\u[0-9a-f]{4}/i, Str::Escape
rule %r/\\./m, Str::Escape
end
state :string do
rule %r/"/, Str::Double, :pop!
mixin :interp
rule %r/[^\\\[\$"{}]+/m, Str::Double
# strings have to keep count of their internal braces, to support
# for example { "{ }" }.
rule %r/{/ do
@brace_count ||= 0
@brace_count += 1
token Str::Double
end
rule %r/}/ do
if in_state? :brace and @brace_count.to_i == 0
pop! until state? :brace
pop!
token Punctuation
else
@brace_count -= 1
token Str::Double
end
end
end
end
end
end