def script_method(fn):
if not _enabled:
return fn
# NOTE: we need to traverse two frames here because the meta-class frame
# for ScriptModule will be present, as opposed to invoking @script on a
# a function or invoking define() on a CompilationUnit.
# The stack will look like:
#
# 0. createResolutionCallback()
# 1. script_method()
# 2. ScriptModule metaclass frame
# 3. Surrounding scope
#
# createResolutionCallback internally adds 1 to get us to the scope of this
# function (the calling function). Adding 2 gets us to the proper surrounding scope.
_rcb = _jit_internal.createResolutionCallbackFromFrame(frames_up=2)
ast = get_jit_def(fn, fn.__name__, self_name="ScriptModule")
return ScriptMethodStub(_rcb, ast, fn)
def define(self, src):
if "_actual_script_module" in self.__dict__:
# If we have completed initialization, just defer to the
# backing RecursiveScriptModule to eagerly compile the provided
# source.
return self._actual_script_module.define(src)
# Otherwise, we are still in the object's __init__.
# In that case, add `src` as a stub to be compiled.
#
# We use frames_up=1 to get to the proper surrounding scope. The stack
# will look like:
# 0. createResolutionCallback
# 1. define()
# 2. surrounding scope.
#
# createResolutionCallback internally adds 1 to get us to our frame, then
# we add 1 to get to the proper surrounding scope.
rcb = _jit_internal.createResolutionCallbackFromFrame(frames_up=1)
ast = torch._C._parse_source_def(src)
self._methods[ast.name().name] = ScriptMethodStub(rcb, ast, None)