93 lines
3.0 KiB
Ruby
93 lines
3.0 KiB
Ruby
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# -*- coding: utf-8 -*- #
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# frozen_string_literal: true
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module Rouge
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module Lexers
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class Java < RegexLexer
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title "Java"
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desc "The Java programming language (java.com)"
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tag 'java'
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filenames '*.java'
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mimetypes 'text/x-java'
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keywords = %w(
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assert break case catch continue default do else finally for
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if goto instanceof new return switch this throw try while
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)
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declarations = %w(
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abstract const enum extends final implements native private protected
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public static strictfp super synchronized throws transient volatile
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)
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types = %w(boolean byte char double float int long short var void)
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id = /[a-zA-Z_][a-zA-Z0-9_]*/
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const_name = /[A-Z][A-Z0-9_]*\b/
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class_name = /[A-Z][a-zA-Z0-9]*\b/
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state :root do
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rule %r/[^\S\n]+/, Text
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rule %r(//.*?$), Comment::Single
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rule %r(/\*.*?\*/)m, Comment::Multiline
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# keywords: go before method names to avoid lexing "throw new XYZ"
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# as a method signature
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rule %r/(?:#{keywords.join('|')})\b/, Keyword
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rule %r(
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(\s*(?:[a-zA-Z_][a-zA-Z0-9_.\[\]<>]*\s+)+?) # return arguments
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([a-zA-Z_][a-zA-Z0-9_]*) # method name
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(\s*)(\() # signature start
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)mx do |m|
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# TODO: do this better, this shouldn't need a delegation
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delegate Java, m[1]
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token Name::Function, m[2]
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token Text, m[3]
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token Operator, m[4]
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end
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rule %r/@#{id}/, Name::Decorator
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rule %r/(?:#{declarations.join('|')})\b/, Keyword::Declaration
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rule %r/(?:#{types.join('|')})\b/, Keyword::Type
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rule %r/package\b/, Keyword::Namespace
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rule %r/(?:true|false|null)\b/, Keyword::Constant
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rule %r/(?:class|interface)\b/, Keyword::Declaration, :class
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rule %r/import\b/, Keyword::Namespace, :import
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rule %r/"(\\\\|\\"|[^"])*"/, Str
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rule %r/'(?:\\.|[^\\]|\\u[0-9a-f]{4})'/, Str::Char
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rule %r/(\.)(#{id})/ do
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groups Operator, Name::Attribute
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end
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rule %r/#{id}:/, Name::Label
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rule const_name, Name::Constant
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rule class_name, Name::Class
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rule %r/\$?#{id}/, Name
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rule %r/[~^*!%&\[\](){}<>\|+=:;,.\/?-]/, Operator
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digit = /[0-9]_+[0-9]|[0-9]/
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bin_digit = /[01]_+[01]|[01]/
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oct_digit = /[0-7]_+[0-7]|[0-7]/
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hex_digit = /[0-9a-f]_+[0-9a-f]|[0-9a-f]/i
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rule %r/#{digit}+\.#{digit}+([eE]#{digit}+)?[fd]?/, Num::Float
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rule %r/0b#{bin_digit}+/i, Num::Bin
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rule %r/0x#{hex_digit}+/i, Num::Hex
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rule %r/0#{oct_digit}+/, Num::Oct
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rule %r/#{digit}+L?/, Num::Integer
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rule %r/\n/, Text
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end
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state :class do
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rule %r/\s+/m, Text
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rule id, Name::Class, :pop!
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end
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state :import do
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rule %r/\s+/m, Text
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rule %r/[a-z0-9_.]+\*?/i, Name::Namespace, :pop!
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end
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end
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end
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end
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