def _instantiateFunction(self, filename, lineNumber, memberDictionary):
"""Instantiate a function instance."""
objectOrNone = self.moduleLevelObject(filename, lineNumber)
if objectOrNone is not None:
return objectOrNone
sourceAst = PyAstUtil.getAstFromFilePath(filename)
functionAst = PyAstUtil.functionDefOrLambdaAtLineNumber(sourceAst, lineNumber)
outputLocals = {}
globalScope = {}
globalScope.update(memberDictionary)
self.importModuleMagicVariables(globalScope, filename)
if isinstance(functionAst, ast.Lambda):
expr = ast.Expression()
expr.body = functionAst
expr.lineno = functionAst.lineno
expr.col_offset = functionAst.col_offset
code = compile(expr, filename, 'eval')
return eval(code, globalScope, outputLocals)
else:
code = compile(ast.Module([functionAst]), filename, 'exec')
exec code in globalScope, outputLocals
assert len(outputLocals) == 1
return list(outputLocals.values())[0]
def test_freeVariablesMemberAccessChain_onFunctionDefNode(self):
tree1 = ast.parse(
textwrap.dedent("""
def g(arg):
if arg < 0:
return x + arg
return x * h(arg - 1, g)
"""))
res = PyAstFreeVariableAnalyses.getFreeVariableMemberAccessChains(
tree1)
self.assertEqual(set([('h', ), ('x', )]), res)
tree2 = PyAstUtil.functionDefOrLambdaAtLineNumber(tree1, 2)
self.assertEqual(
set([('h', ), ('x', )]),
PyAstFreeVariableAnalyses.getFreeVariableMemberAccessChains(
tree2, False))
def _pyObjectNodeForClassOrFunction(self, pyObject, classOrFunction):
try:
sourceFileText, sourceFileName = PyAstUtil.getSourceFilenameAndText(pyObject)
except Exceptions.CantGetSourceTextError as e:
raise Exceptions.PythonToForaConversionError(e.message)
_, sourceLine = PyforaInspect.getsourcelines(pyObject)
sourceAst = PyAstUtil.getSourceFileAst(pyObject)
if classOrFunction is PyObjectNodes.FunctionDefinition:
pyAst = PyAstUtil.functionDefOrLambdaAtLineNumber(sourceAst, sourceLine)
else:
assert classOrFunction is PyObjectNodes.ClassDefinition
pyAst = PyAstUtil.classDefAtLineNumber(sourceAst, sourceLine)
freeVariableMemberAccessChainResolutions = \
self._resolveFreeVariableMemberAccessChains(
pyObject, pyAst
)
processedFreeVariableMemberAccessChainResolutions = { \
'.'.join(chain): resolution for chain, resolution in \
freeVariableMemberAccessChainResolutions.iteritems()
}
if sourceFileName in self._fileTextCache:
fileObject = self._fileTextCache[sourceFileName]
else:
fileObject = PyObjectNodes.File(sourceFileName, sourceFileText)
self._fileTextCache[sourceFileName] = fileObject
return classOrFunction(
pyObject,
fileObject,
sourceLine,
processedFreeVariableMemberAccessChainResolutions
)
def _pyObjectNodeForClassOrFunction(self, pyObject, classOrFunction):
try:
sourceFileText, sourceFileName = PyAstUtil.getSourceFilenameAndText(
pyObject)
except Exceptions.CantGetSourceTextError as e:
raise Exceptions.PythonToForaConversionError(e.message)
_, sourceLine = PyforaInspect.getsourcelines(pyObject)
sourceAst = PyAstUtil.getSourceFileAst(pyObject)
if classOrFunction is PyObjectNodes.FunctionDefinition:
pyAst = PyAstUtil.functionDefOrLambdaAtLineNumber(
sourceAst, sourceLine)
else:
assert classOrFunction is PyObjectNodes.ClassDefinition
pyAst = PyAstUtil.classDefAtLineNumber(sourceAst, sourceLine)
freeVariableMemberAccessChainResolutions = \
self._resolveFreeVariableMemberAccessChains(
pyObject, pyAst
)
processedFreeVariableMemberAccessChainResolutions = { \
'.'.join(chain): resolution for chain, resolution in \
freeVariableMemberAccessChainResolutions.iteritems()
}
if sourceFileName in self._fileTextCache:
fileObject = self._fileTextCache[sourceFileName]
else:
fileObject = PyObjectNodes.File(sourceFileName, sourceFileText)
self._fileTextCache[sourceFileName] = fileObject
return classOrFunction(
pyObject, fileObject, sourceLine,
processedFreeVariableMemberAccessChainResolutions)
def test_freeVariablesMemberAccessChain_onFunctionDefNode(self):
tree1 = ast.parse(
textwrap.dedent(
"""
def g(arg):
if arg < 0:
return x + arg
return x * h(arg - 1, g)
"""
)
)
res = PyAstFreeVariableAnalyses.getFreeVariableMemberAccessChains(tree1)
self.assertEqual(
set([('h',), ('x',)]),
res
)
tree2 = PyAstUtil.functionDefOrLambdaAtLineNumber(tree1, 2)
self.assertEqual(
set([('h',), ('x',)]),
PyAstFreeVariableAnalyses.getFreeVariableMemberAccessChains(tree2, False)
)
