author | Claudio Luck <claudio.luck@pep.foundation> |
Thu, 19 Mar 2020 16:45:02 +0100 | |
changeset 62 | 00a196f8d14a |
parent 58 | a218553807ab |
child 65 | d659b8c2ed22 |
permissions | -rw-r--r-- |
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# YPL parser 1.6 |
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# adapted for Python 3.x |
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# written by VB. |
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import re |
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import sys, codecs |
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class keyword(str): pass |
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class code(str): pass |
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class ignore(object): |
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def __init__(self, regex_text, *args): |
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self.regex = re.compile(regex_text, *args) |
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class _and(object): |
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def __init__(self, something): |
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self.obj = something |
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class _not(_and): pass |
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class Name(str): |
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def __init__(self, *args): |
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self.line = 0 |
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self.file = "" |
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class Symbol(list): |
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def __init__(self, name, what): |
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self.__name__ = name |
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self.append(name) |
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self.what = what |
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self.append(what) |
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def __call__(self): |
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return self.what |
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def __str__(self): |
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return 'Symbol(' + repr(self.__name__) + ', ' + repr(self.what) + ')' |
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def __repr__(self): |
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return str(self) |
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word_regex = re.compile(r"\w+") |
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rest_regex = re.compile(r".*") |
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print_trace = False |
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def u(text): |
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if isinstance(text, BaseException): |
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text = text.args[0] |
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if type(text) is str: |
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return text |
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if isinstance(text, bytes): |
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if sys.stdin.encoding: |
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return codecs.decode(text, sys.stdin.encoding) |
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else: |
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return codecs.decode(text, "utf-8") |
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return str(text) |
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def skip(skipper, text, skipWS, skipComments): |
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if skipWS: |
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t = text.lstrip() |
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else: |
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t = text |
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if skipComments: |
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try: |
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while True: |
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skip, t = skipper.parseLine(t, skipComments, [], skipWS, None) |
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if skipWS: |
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t = t.lstrip() |
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except: pass |
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return t |
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class parser(object): |
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def __init__(self, another = False, p = False): |
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self.restlen = -1 |
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if not(another): |
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self.skipper = parser(True, p) |
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self.skipper.packrat = p |
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else: |
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self.skipper = self |
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self.lines = None |
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self.textlen = 0 |
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self.memory = {} |
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self.packrat = p |
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# parseLine(): |
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# textline: text to parse |
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# pattern: pyPEG language description |
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# resultSoFar: parsing result so far (default: blank list []) |
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# skipWS: Flag if whitespace should be skipped (default: True) |
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# skipComments: Python functions returning pyPEG for matching comments |
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# |
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# returns: pyAST, textrest |
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# |
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# raises: SyntaxError(reason) if textline is detected not being in language |
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# described by pattern |
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# |
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# SyntaxError(reason) if pattern is an illegal language description |
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def parseLine(self, textline, pattern, resultSoFar = [], skipWS = True, skipComments = None): |
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name = None |
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_textline = textline |
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_pattern = pattern |
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def R(result, text): |
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if __debug__: |
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if print_trace: |
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try: |
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if _pattern.__name__ != "comment": |
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sys.stderr.write("match: " + _pattern.__name__ + "\n") |
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except: pass |
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if self.restlen == -1: |
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self.restlen = len(text) |
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else: |
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self.restlen = min(self.restlen, len(text)) |
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res = resultSoFar |
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if name and result: |
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name.line = self.lineNo() |
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res.append(Symbol(name, result)) |
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elif name: |
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name.line = self.lineNo() |
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res.append(Symbol(name, [])) |
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elif result: |
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if type(result) is type([]): |
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res.extend(result) |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
124 |
else: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
125 |
res.extend([result]) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
126 |
if self.packrat: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
127 |
self.memory[(len(_textline), id(_pattern))] = (res, text) |
b4a9a3122abb
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parents:
diff
changeset
|
128 |
return res, text |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
129 |
|
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
130 |
def syntaxError(): |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
131 |
if self.packrat: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
132 |
self.memory[(len(_textline), id(_pattern))] = False |
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parents:
diff
changeset
|
133 |
raise SyntaxError() |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
134 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
135 |
if self.packrat: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
136 |
try: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
137 |
result = self.memory[(len(textline), id(pattern))] |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
138 |
if result: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
139 |
return result |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
140 |
else: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
141 |
raise SyntaxError() |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
142 |
except: pass |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
143 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
144 |
if callable(pattern): |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
145 |
if __debug__: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
146 |
if print_trace: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
147 |
try: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
148 |
if pattern.__name__ != "comment": |
58
a218553807ab
pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
149 |
sys.stderr.write("testing with " + pattern.__name__ + ": " + textline[:40] + "\n") |
52
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
150 |
except: pass |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
151 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
152 |
if pattern.__name__[0] != "_": |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
153 |
name = Name(pattern.__name__) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
154 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
155 |
pattern = pattern() |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
156 |
if callable(pattern): |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
157 |
pattern = (pattern,) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
158 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
159 |
text = skip(self.skipper, textline, skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
160 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
161 |
pattern_type = type(pattern) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
162 |
|
58
a218553807ab
pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
163 |
if pattern_type is str: |
52
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
164 |
if text[:len(pattern)] == pattern: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
165 |
text = skip(self.skipper, text[len(pattern):], skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
166 |
return R(None, text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
167 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
168 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
169 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
170 |
elif pattern_type is keyword: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
171 |
m = word_regex.match(text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
172 |
if m: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
173 |
if m.group(0) == pattern: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
174 |
text = skip(self.skipper, text[len(pattern):], skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
175 |
return R(None, text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
176 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
177 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
178 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
179 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
180 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
181 |
elif pattern_type is _not: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
182 |
try: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
183 |
r, t = self.parseLine(text, pattern.obj, [], skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
184 |
except: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
185 |
return resultSoFar, textline |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
186 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
187 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
188 |
elif pattern_type is _and: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
189 |
r, t = self.parseLine(text, pattern.obj, [], skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
190 |
return resultSoFar, textline |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
191 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
192 |
elif pattern_type is type(word_regex) or pattern_type is ignore: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
193 |
if pattern_type is ignore: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
194 |
pattern = pattern.regex |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
195 |
m = pattern.match(text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
196 |
if m: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
197 |
text = skip(self.skipper, text[len(m.group(0)):], skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
198 |
if pattern_type is ignore: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
199 |
return R(None, text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
200 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
201 |
return R(m.group(0), text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
202 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
203 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
204 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
205 |
elif pattern_type is tuple: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
206 |
result = [] |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
207 |
n = 1 |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
208 |
for p in pattern: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
209 |
if type(p) is type(0): |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
210 |
n = p |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
211 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
212 |
if n>0: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
213 |
for i in range(n): |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
214 |
result, text = self.parseLine(text, p, result, skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
215 |
elif n==0: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
216 |
if text == "": |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
217 |
pass |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
218 |
else: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
219 |
try: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
220 |
newResult, newText = self.parseLine(text, p, result, skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
221 |
result, text = newResult, newText |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
222 |
except SyntaxError: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
223 |
pass |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
224 |
elif n<0: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
225 |
found = False |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
226 |
while True: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
227 |
try: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
228 |
newResult, newText = self.parseLine(text, p, result, skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
229 |
result, text, found = newResult, newText, True |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
230 |
except SyntaxError: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
231 |
break |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
232 |
if n == -2 and not(found): |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
233 |
syntaxError() |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
234 |
n = 1 |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
235 |
return R(result, text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
236 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
237 |
elif pattern_type is list: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
238 |
result = [] |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
239 |
found = False |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
240 |
for p in pattern: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
241 |
try: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
242 |
result, text = self.parseLine(text, p, result, skipWS, skipComments) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
243 |
found = True |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
244 |
except SyntaxError: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
245 |
pass |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
246 |
if found: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
247 |
break |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
248 |
if found: |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
249 |
return R(result, text) |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
250 |
else: |
b4a9a3122abb
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251 |
syntaxError() |
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252 |
|
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253 |
else: |
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raise SyntaxError("illegal type in grammar: " + u(pattern_type)) |
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255 |
|
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256 |
def lineNo(self): |
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if not(self.lines): return "" |
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258 |
if self.restlen == -1: return "" |
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259 |
parsed = self.textlen - self.restlen |
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|
260 |
|
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|
261 |
left, right = 0, len(self.lines) |
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|
262 |
|
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|
263 |
while True: |
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|
264 |
mid = int((right + left) / 2) |
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|
265 |
if self.lines[mid][0] <= parsed: |
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|
266 |
try: |
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|
267 |
if self.lines[mid + 1][0] >= parsed: |
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|
268 |
try: |
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269 |
return u(self.lines[mid + 1][1]) + ":" + u(self.lines[mid + 1][2]) |
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|
270 |
except: |
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271 |
return "" |
52
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|
272 |
else: |
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|
273 |
left = mid + 1 |
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|
274 |
except: |
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|
275 |
try: |
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276 |
return u(self.lines[mid + 1][1]) + ":" + u(self.lines[mid + 1][2]) |
52
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|
277 |
except: |
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pypackage: Merge 2.6.2
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|
278 |
return "" |
52
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|
279 |
else: |
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parents:
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|
280 |
right = mid - 1 |
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parents:
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|
281 |
if left > right: |
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parents:
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|
282 |
return "" |
52
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parents:
diff
changeset
|
283 |
|
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parents:
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|
284 |
# plain module API |
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parents:
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|
285 |
|
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parents:
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|
286 |
def parseLine(textline, pattern, resultSoFar = [], skipWS = True, skipComments = None, packrat = False): |
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parents:
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|
287 |
p = parser(p=packrat) |
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parents:
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|
288 |
text = skip(p.skipper, textline, skipWS, skipComments) |
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parents:
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|
289 |
ast, text = p.parseLine(text, pattern, resultSoFar, skipWS, skipComments) |
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parents:
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|
290 |
return ast, text |
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parents:
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changeset
|
291 |
|
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parents:
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changeset
|
292 |
# parse(): |
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parents:
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|
293 |
# language: pyPEG language description |
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parents:
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|
294 |
# lineSource: a fileinput.FileInput object |
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parents:
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|
295 |
# skipWS: Flag if whitespace should be skipped (default: True) |
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parents:
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changeset
|
296 |
# skipComments: Python function which returns pyPEG for matching comments |
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parents:
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changeset
|
297 |
# packrat: use memoization |
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parents:
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|
298 |
# lineCount: add line number information to AST |
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parents:
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changeset
|
299 |
# |
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parents:
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|
300 |
# returns: pyAST |
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parents:
diff
changeset
|
301 |
# |
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parents:
diff
changeset
|
302 |
# raises: SyntaxError(reason), if a parsed line is not in language |
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parents:
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changeset
|
303 |
# SyntaxError(reason), if the language description is illegal |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
304 |
|
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
305 |
def parse(language, lineSource, skipWS = True, skipComments = None, packrat = False, lineCount = True): |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
306 |
lines, lineNo = [], 0 |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
307 |
|
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
308 |
while callable(language): |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
309 |
language = language() |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
310 |
|
58
a218553807ab
pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
311 |
orig, ld = "", 0 |
52
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
312 |
for line in lineSource: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
313 |
if lineSource.isfirstline(): |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
314 |
ld = 1 |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
315 |
else: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
316 |
ld += 1 |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
317 |
lines.append((len(orig), lineSource.filename(), lineSource.lineno() - 1)) |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
318 |
orig += u(line) |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
319 |
|
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
320 |
textlen = len(orig) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
321 |
|
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
322 |
try: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
323 |
p = parser(p=packrat) |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
324 |
p.textlen = len(orig) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
325 |
if lineCount: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
326 |
p.lines = lines |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
327 |
else: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
328 |
p.line = None |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
329 |
text = skip(p.skipper, orig, skipWS, skipComments) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
330 |
result, text = p.parseLine(text, language, [], skipWS, skipComments) |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
331 |
if text: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
332 |
raise SyntaxError() |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
333 |
|
58
a218553807ab
pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
334 |
except SyntaxError as msg: |
52
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
335 |
parsed = textlen - p.restlen |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
336 |
textlen = 0 |
58
a218553807ab
pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
337 |
nn, lineNo, file = 0, 0, "" |
52
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
338 |
for n, ld, l in lines: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
339 |
if n >= parsed: |
b4a9a3122abb
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
340 |
break |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
341 |
else: |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
342 |
lineNo = l |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
343 |
nn += 1 |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
344 |
file = ld |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
345 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
346 |
lineNo += 1 |
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
347 |
nn -= 1 |
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Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
348 |
lineCont = orig.splitlines()[nn] |
58
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pypackage: Merge 2.6.2
Claudio Luck <claudio.luck@pep.foundation>
parents:
52
diff
changeset
|
349 |
raise SyntaxError("syntax error in " + u(file) + ":" + u(lineNo) + ": " + lineCont) |
52
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move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
350 |
|
b4a9a3122abb
move python code into new package dir
Claudio Luck <claudio.luck@pep.foundation>
parents:
diff
changeset
|
351 |
return result |