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| author | Guido van Rossum <guido@python.org> | 1997-07-11 21:10:17 +0000 |
|---|---|---|
| committer | Guido van Rossum <guido@python.org> | 1997-07-11 21:10:17 +0000 |
| commit | 5d6de256d5bd27263cbe1477acfbc8776bee51d4 (patch) | |
| tree | 8d04bd7bb051440f7f48cdb9a2f41e022fb3dd70 /Lib/re.py | |
| parent | 8a9a4a2336c6b2254b9eeaf1d282d2a69bb8de53 (diff) | |
| download | cpython-git-5d6de256d5bd27263cbe1477acfbc8776bee51d4.tar.gz | |
New from Jeffrey; small nits.
Diffstat (limited to 'Lib/re.py')
| -rw-r--r-- | Lib/re.py | 14 |
1 files changed, 12 insertions, 2 deletions
@@ -350,6 +350,7 @@ class SyntaxSpec(Instruction): self.syntax = syntax Instruction.__init__(self, chr(20), 2) def assemble(self, postition, labels): + # XXX return self.opcode + chr(self.syntax) class NotSyntaxSpec(Instruction): @@ -358,6 +359,7 @@ class NotSyntaxSpec(Instruction): self.syntax = syntax Instruction.__init__(self, chr(21), 2) def assemble(self, postition, labels): + # XXX return self.opcode + chr(self.syntax) class Label(Instruction): @@ -373,11 +375,15 @@ class OpenParen(Instruction): def __init__(self, register): self.register = register Instruction.__init__(self, '', 0) + def assemble(self, position, labels): + raise error, 'unmatched open parenthesis' class Alternation(Instruction): name = '|' def __init__(self): Instruction.__init__(self, '', 0) + def assemble(self, position, labels): + raise error, 'an alternation was not taken care of' # # @@ -924,7 +930,9 @@ def compile(pattern, flags=0): elif char == '*': # Kleene closure if len(stack) == 0: - raise error, 'the Kleene closure needs something to repeat' + raise error, '* needs something to repeat' + if (stack[-1][0].name == '(') or (stack[-1][0].name == '|'): + raise error, '* needs something to repeat' registers = registers_used(stack[-1]) if (index < len(pattern)) and (pattern[index] == '?'): # non-greedy matching @@ -948,7 +956,9 @@ def compile(pattern, flags=0): elif char == '+': # positive closure if len(stack) == 0: - raise error, 'the positive closure needs something to repeat' + raise error, '+ needs something to repeat' + if (stack[-1][0].name == '(') or (stack[-1][0].name == '|'): + raise error, '+ needs something to repeat' registers = registers_used(stack[-1]) if (index < len(pattern)) and (pattern[index] == '?'): # non-greedy |