1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
# -*- coding: utf-8 -*-
# yapf: disable
"""
pygments.lexers.stata
~~~~~~~~~~~~~~~~~~~~~
Lexer for Stata
:copyright: Copyright 2006-2017 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
from pygments.lexer import RegexLexer, include, words
from pygments.token import Comment, Keyword, Name, Number, \
String, Text, Operator
from pygments.lexers._stata_builtins import builtins_base, builtins_functions
__all__ = ['StataLexer']
class StataLexer(RegexLexer):
"""
For `Stata <http://www.stata.com/>`_ do files.
.. versionadded:: 2.2
"""
# Syntax based on
# - http://fmwww.bc.edu/RePEc/bocode/s/synlightlist.ado
# - http://github.com/isagalaev/highlight.js/blob/master/src/languages/stata.js
# - http://github.com/jpitblado/vim-stata/blob/master/syntax/stata.vim
name = 'Stata'
aliases = ['stata', 'do']
filenames = ['*.do', '*.ado']
mimetypes = ['text/x-stata', 'text/stata', 'application/x-stata']
flags = re.MULTILINE | re.DOTALL
tokens = {
'root': [
include('comments'),
include('strings'),
include('macros'),
include('numbers'),
include('keywords'),
include('operators'),
include('format'),
(r'.', Text),
],
# Comments are a complicated beast in Stata because they can be
# nested and there are a few corner cases with that. See:
# - github.com/kylebarron/language-stata/issues/90
# - statalist.org/forums/forum/general-stata-discussion/general/1448244
'comments': [
(r'(^//|(?<=\s)//)(?!/)', Comment.Single, 'comments-double-slash'),
(r'^\s*\*', Comment.Single, 'comments-star'),
(r'/\*', Comment.Multiline, 'comments-block'),
(r'(^///|(?<=\s)///)', Comment.Special, 'comments-triple-slash')
],
'comments-block': [
(r'/\*', Comment.Multiline, '#push'),
# this ends and restarts a comment block. but need to catch this so
# that it doesn\'t start _another_ level of comment blocks
(r'\*/\*', Comment.Multiline),
(r'(\*/\s+\*(?!/)[^\n]*)|(\*/)', Comment.Multiline, '#pop'),
# Match anything else as a character inside the comment
(r'.', Comment.Multiline),
],
'comments-star': [
(r'///.*?\n', Comment.Single,
('#pop', 'comments-triple-slash')),
(r'(^//|(?<=\s)//)(?!/)', Comment.Single,
('#pop', 'comments-double-slash')),
(r'/\*', Comment.Multiline, 'comments-block'),
(r'.(?=\n)', Comment.Single, '#pop'),
(r'.', Comment.Single),
],
'comments-triple-slash': [
(r'\n', Comment.Special, '#pop'),
# A // breaks out of a comment for the rest of the line
(r'//.*?(?=\n)', Comment.Single, '#pop'),
(r'.', Comment.Special),
],
'comments-double-slash': [
(r'\n', Text, '#pop'),
(r'.', Comment.Single),
],
# `"compound string"' and regular "string"; note the former are
# nested.
'strings': [
(r'`"', String, 'string-compound'),
(r'(?<!`)"', String, 'string-regular'),
],
'string-compound': [
(r'`"', String, '#push'),
(r'"\'', String, '#pop'),
(r'\\\\|\\"|\\\$|\\`|\\\n', String.Escape),
include('macros'),
(r'.', String)
],
'string-regular': [
(r'(")(?!\')|(?=\n)', String, '#pop'),
(r'\\\\|\\"|\\\$|\\`|\\\n', String.Escape),
include('macros'),
(r'.', String)
],
# A local is usually
# `\w{0,31}'
# `:extended macro'
# `=expression'
# `[rsen](results)'
# `(++--)scalar(++--)'
#
# However, there are all sorts of weird rules wrt edge
# cases. Instead of writing 27 exceptions, anything inside
# `' is a local.
#
# A global is more restricted, so we do follow rules. Note only
# locals explicitly enclosed ${} can be nested.
'macros': [
(r'\$(\{|(?=[\$`]))', Name.Variable.Global, 'macro-global-nested'),
(r'\$', Name.Variable.Global, 'macro-global-name'),
(r'`', Name.Variable, 'macro-local'),
],
'macro-local': [
(r'`', Name.Variable, '#push'),
(r"'", Name.Variable, '#pop'),
(r'\$(\{|(?=[\$`]))', Name.Variable.Global, 'macro-global-nested'),
(r'\$', Name.Variable.Global, 'macro-global-name'),
(r'.', Name.Variable), # fallback
],
'macro-global-nested': [
(r'\$(\{|(?=[\$`]))', Name.Variable.Global, '#push'),
(r'\}', Name.Variable.Global, '#pop'),
(r'\$', Name.Variable.Global, 'macro-global-name'),
(r'`', Name.Variable, 'macro-local'),
(r'\w', Name.Variable.Global), # fallback
(r'(?!\w)', Name.Variable.Global, '#pop'),
],
'macro-global-name': [
(r'\$(\{|(?=[\$`]))', Name.Variable.Global, 'macro-global-nested', '#pop'),
(r'\$', Name.Variable.Global, 'macro-global-name', '#pop'),
(r'`', Name.Variable, 'macro-local', '#pop'),
(r'\w{1,32}', Name.Variable.Global, '#pop'),
],
# Built in functions and statements
'keywords': [
(words(builtins_functions, prefix = r'\b', suffix = r'(?=\()'),
Name.Function),
(words(builtins_base, prefix = r'(^\s*|\s)', suffix = r'\b'),
Keyword),
],
# http://www.stata.com/help.cgi?operators
'operators': [
(r'-|==|<=|>=|<|>|&|!=', Operator),
(r'\*|\+|\^|/|!|~|==|~=', Operator)
],
# Stata numbers
'numbers': [
# decimal number
(r'\b[+-]?([0-9]+(\.[0-9]+)?|\.[0-9]+|\.)([eE][+-]?[0-9]+)?[i]?\b',
Number),
],
# Stata formats
'format': [
(r'%-?\d{1,2}(\.\d{1,2})?[gfe]c?', Name.Format),
(r'%(21x|16H|16L|8H|8L)', Name.Format),
(r'%-?(tc|tC|td|tw|tm|tq|th|ty|tg).{0,32}', Name.Format),
(r'%[-~]?\d{1,4}s', Name.Format),
]
}
|
