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from pygments.lexer import RegexLexer, bygroups, include
from pygments.token import Comment, Keyword, Name, Number, String, Whitespace
__all__ = ['RtlilLexer']
class RtlilLexer(RegexLexer):
name = 'RTLIL'
aliases = ['rtlil']
filenames = ['*.il']
keyword_re = r'(always|assign|attribute|autoidx|case|cell|connect|edge|end|global|high|init|inout|input|low|memory|module|negedge|offset|output|parameter|posedge|process|real|signed|size|switch|sync|update|upto|width|wire)'
tokens = {
'common': [
(r'\s+', Whitespace),
(r'#.*', Comment.Single),
(keyword_re, Keyword),
(r'([\\\$][^ \t\r\n]+|\.[0-9]+)', Name.Variable),
(r"[0-9]+'[01xzm-]*", Number),
(r'-?[0-9]+', Number.Integer),
(r'"', String, 'string'),
],
'root': [
(r'cell', Keyword, 'cell_definition'),
(r'(module|wire|memory|process)', Keyword, 'definition'),
include('common'),
],
'definition': [
(r'([\\\$][^ \t\r\n]+|\.[0-9]+)', Name.Entity, '#pop'),
include('common')
],
'cell_definition': [
(r'(\$[^ \t\r\n]+)\b', Name.Function),
(r'(\\[^ \t\r\n]+|\.[0-9]+)', Name.Variable),
(r'$', Whitespace, '#pop'),
include('common'),
],
'string': [
(r'"', String, '#pop'),
(r'\\([\\abfnrtv"\']|x[a-fA-F0-9]{2,4}|[0-7]{1,3})', String.Escape),
(r'[^\\"\n]+', String), # all other characters
(r'(\\)(\n)', bygroups(String.Escape, Whitespace)), # line continuation
(r'\\', String), # stray backslash
]
}
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