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Inline one line functions.
>>> import gast as ast
>>> from pythran import passmanager, backend
>>> pm = passmanager.PassManager("test")
>>> node = ast.parse('''
... def foo(a, b):
... return b + b * a
... def bar(b):
... return foo(2 * b, b) * foo(b, b)''')
>>> _, node = pm.apply(Inlining, node)
>>> print(pm.dump(backend.Python, node))
def foo(a, b):
return (b + (b * a))
def bar(b):
__pythran_inlinefooa0 = (2 * b)
__pythran_inlinefoob0 = b
__pythran_inlinefooa1 = b
__pythran_inlinefoob1 = b
return ((__pythran_inlinefoob0 + (__pythran_inlinefoob0 * __pythran_inlinefooa0)) * (__pythran_inlinefoob1 + (__pythran_inlinefoob1 * __pythran_inlinefooa1)))
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