author | Nishanth Amuluru <nishanth@fossee.in> |
Sat, 08 Jan 2011 11:20:57 +0530 | |
changeset 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
69
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import sys |
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import py |
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BuiltinAssertionError = py.builtin.builtins.AssertionError |
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_reprcompare = None # if set, will be called by assert reinterp for comparison ops |
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def _format_explanation(explanation): |
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"""This formats an explanation |
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Normally all embedded newlines are escaped, however there are |
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three exceptions: \n{, \n} and \n~. The first two are intended |
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cover nested explanations, see function and attribute explanations |
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for examples (.visit_Call(), visit_Attribute()). The last one is |
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for when one explanation needs to span multiple lines, e.g. when |
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displaying diffs. |
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""" |
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raw_lines = (explanation or '').split('\n') |
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# escape newlines not followed by {, } and ~ |
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lines = [raw_lines[0]] |
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for l in raw_lines[1:]: |
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if l.startswith('{') or l.startswith('}') or l.startswith('~'): |
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lines.append(l) |
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else: |
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lines[-1] += '\\n' + l |
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|
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result = lines[:1] |
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stack = [0] |
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stackcnt = [0] |
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for line in lines[1:]: |
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if line.startswith('{'): |
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if stackcnt[-1]: |
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s = 'and ' |
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else: |
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s = 'where ' |
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stack.append(len(result)) |
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stackcnt[-1] += 1 |
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stackcnt.append(0) |
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result.append(' +' + ' '*(len(stack)-1) + s + line[1:]) |
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elif line.startswith('}'): |
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assert line.startswith('}') |
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stack.pop() |
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stackcnt.pop() |
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result[stack[-1]] += line[1:] |
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else: |
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assert line.startswith('~') |
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result.append(' '*len(stack) + line[1:]) |
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assert len(stack) == 1 |
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return '\n'.join(result) |
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|
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class AssertionError(BuiltinAssertionError): |
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def __init__(self, *args): |
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BuiltinAssertionError.__init__(self, *args) |
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if args: |
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try: |
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self.msg = str(args[0]) |
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except py.builtin._sysex: |
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raise |
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except: |
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self.msg = "<[broken __repr__] %s at %0xd>" %( |
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args[0].__class__, id(args[0])) |
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else: |
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f = py.code.Frame(sys._getframe(1)) |
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try: |
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source = f.code.fullsource |
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if source is not None: |
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try: |
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source = source.getstatement(f.lineno, assertion=True) |
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except IndexError: |
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source = None |
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else: |
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source = str(source.deindent()).strip() |
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except py.error.ENOENT: |
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source = None |
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# this can also occur during reinterpretation, when the |
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# co_filename is set to "<run>". |
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if source: |
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self.msg = reinterpret(source, f, should_fail=True) |
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else: |
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self.msg = "<could not determine information>" |
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if not self.args: |
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self.args = (self.msg,) |
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if sys.version_info > (3, 0): |
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AssertionError.__module__ = "builtins" |
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reinterpret_old = "old reinterpretation not available for py3" |
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else: |
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from py._code._assertionold import interpret as reinterpret_old |
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if sys.version_info >= (2, 6) or (sys.platform.startswith("java")): |
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from py._code._assertionnew import interpret as reinterpret |
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else: |
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reinterpret = reinterpret_old |
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