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|
# -*- coding: utf-8 -*- #
# frozen_string_literal: true
module Rouge
module Lexers
class YANG < RegexLexer
title 'YANG'
desc "Lexer for the YANG 1.1 modeling language (RFC7950)"
tag 'yang'
filenames '*.yang'
mimetypes 'application/yang'
id = /[\w-]+(?=[^\w\-\:])\b/
#Keywords from RFC7950 ; oriented at BNF style
def self.top_stmts_keywords
@top_stms_keywords ||= Set.new %w(
module submodule
)
end
def self.module_header_stmts_keywords
@module_header_stmts_keywords ||= Set.new %w(
belongs-to namespace prefix yang-version
)
end
def self.meta_stmts_keywords
@meta_stmts_keywords ||= Set.new %w(
contact description organization reference revision
)
end
def self.linkage_stmts_keywords
@linkage_stmts_keywords ||= Set.new %w(
import include revision-date
)
end
def self.body_stmts_keywords
@body_stms_keywords ||= Set.new %w(
action argument augment deviation extension feature grouping identity
if-feature input notification output rpc typedef
)
end
def self.data_def_stmts_keywords
@data_def_stms_keywords ||= Set.new %w(
anydata anyxml case choice config container deviate leaf leaf-list
list must presence refine uses when
)
end
def self.type_stmts_keywords
@type_stmts_keywords ||= Set.new %w(
base bit default enum error-app-tag error-message fraction-digits
length max-elements min-elements modifier ordered-by path pattern
position range require-instance status type units value yin-element
)
end
def self.list_stmts_keywords
@list_stmts_keywords ||= Set.new %w(
key mandatory unique
)
end
#RFC7950 other keywords
def self.constants_keywords
@constants_keywords ||= Set.new %w(
add current delete deprecated false invert-match max min
not-supported obsolete replace true unbounded user
)
end
#RFC7950 Built-In Types
def self.types
@types ||= Set.new %w(
binary bits boolean decimal64 empty enumeration identityref
instance-identifier int16 int32 int64 int8 leafref string uint16
uint32 uint64 uint8 union
)
end
state :comment do
rule %r/[^*\/]/, Comment
rule %r/\/\*/, Comment, :comment
rule %r/\*\//, Comment, :pop!
rule %r/[*\/]/, Comment
end
#Keyword::Reserved
#groups Name::Tag, Text::Whitespace
state :root do
rule %r/\s+/, Text::Whitespace
rule %r/[\{\}\;]+/, Punctuation
rule %r/(?<![\-\w])(and|or|not|\+|\.)(?![\-\w])/, Operator
rule %r/"(?:\\"|[^"])*?"/, Str::Double #for double quotes
rule %r/'(?:\\'|[^'])*?'/, Str::Single #for single quotes
rule %r/\/\*/, Comment, :comment
rule %r/\/\/.*?$/, Comment
#match BNF stmt for `node-identifier` with [ prefix ":"]
rule %r/(?:^|(?<=[\s{};]))([\w.-]+)(:)([\w.-]+)(?=[\s{};])/ do
groups Name::Namespace, Punctuation, Name
end
#match BNF stmt `date-arg-str`
rule %r/([0-9]{4}\-[0-9]{2}\-[0-9]{2})(?=[\s\{\}\;])/, Name::Label
rule %r/([0-9]+\.[0-9]+)(?=[\s\{\}\;])/, Num::Float
rule %r/([0-9]+)(?=[\s\{\}\;])/, Num::Integer
rule id do |m|
name = m[0].downcase
if self.class.top_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.module_header_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.meta_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.linkage_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.body_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.data_def_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.type_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.list_stmts_keywords.include? name
token Keyword::Declaration
elsif self.class.types.include? name
token Keyword::Type
elsif self.class.constants_keywords.include? name
token Name::Constant
else
token Name
end
end
rule %r/[^;{}\s'"]+/, Name
end
end
end
end
|
