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https://svn.boost.org/svn/boost/trunk ........ r43417 | danieljames | 2008-02-26 22:04:55 +0000 (Tue, 26 Feb 2008) | 2 lines Fix a link to Boost.Bimap. ........ r43418 | danieljames | 2008-02-26 22:07:25 +0000 (Tue, 26 Feb 2008) | 2 lines Change another link that's no longer in the repository to link to the website. ........ r43422 | danieljames | 2008-02-27 18:51:14 +0000 (Wed, 27 Feb 2008) | 1 line Fix broken copyright urls. Fixes #1573. ........ r43423 | danieljames | 2008-02-27 19:22:01 +0000 (Wed, 27 Feb 2008) | 1 line Fix incorrect links to copyright of the form 'http:#www.boost.org ........ [SVN r43425]
88 lines
3.3 KiB
Python
88 lines
3.3 KiB
Python
# Copyright Bruno da Silva de Oliveira 2003. Use, modification and
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# distribution is subject to the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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'''
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Various helpers for interface files.
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'''
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from settings import *
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from policies import *
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from declarations import *
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#==============================================================================
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# FunctionWrapper
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#==============================================================================
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class FunctionWrapper(object):
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'''Holds information about a wrapper for a function or a method. It is
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divided in 2 parts: the name of the Wrapper, and its code. The code is
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placed in the declaration section of the module, while the name is used to
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def' the function or method (with the pyste namespace prepend to it). If
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code is None, the name is left unchanged.
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'''
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def __init__(self, name, code=None):
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self.name = name
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self.code = code
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def FullName(self):
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if self.code:
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return namespaces.pyste + self.name
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else:
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return self.name
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_printed_warnings = {} # used to avoid double-prints of warnings
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#==============================================================================
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# HandlePolicy
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#==============================================================================
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def HandlePolicy(function, policy):
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'''Show a warning to the user if the function needs a policy and doesn't
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have one. Return a policy to the function, which is the given policy itself
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if it is not None, or a default policy for this method.
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'''
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def IsString(type):
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'Return True if the Type instance can be considered a string'
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return type.FullName() == 'const char*'
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def IsPyObject(type):
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return type.FullName() == '_object *' # internal name of PyObject
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result = function.result
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# if the function returns const char*, a policy is not needed
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if IsString(result) or IsPyObject(result):
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return policy
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# if returns a const T&, set the default policy
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if policy is None and result.const and isinstance(result, ReferenceType):
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policy = return_value_policy(copy_const_reference)
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# basic test if the result type demands a policy
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needs_policy = isinstance(result, (ReferenceType, PointerType))
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# show a warning to the user, if needed
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if needs_policy and policy is None:
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global _printed_warnings
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warning = '---> Error: %s returns a pointer or a reference, ' \
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'but no policy was specified.' % function.FullName()
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if warning not in _printed_warnings:
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print warning
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print
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# avoid double prints of the same warning
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_printed_warnings[warning] = 1
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return policy
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#==============================================================================
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# EspecializeTypeID
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#==============================================================================
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_exported_type_ids = {}
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def EspecializeTypeID(typename):
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global _exported_type_ids
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macro = 'BOOST_PYTHON_OPAQUE_SPECIALIZED_TYPE_ID(%s)\n' % typename
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if macro not in _exported_type_ids:
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_exported_type_ids[macro] = 1
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return macro
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else:
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return None
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