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Document LOAD_FAST_CHECK opcode (#93498)

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Dennis Sweeney 2022-06-05 11:24:09 -04:00 committed by GitHub
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@ -1042,6 +1042,17 @@ iterations of the loop.
Pushes a reference to the local ``co_varnames[var_num]`` onto the stack. Pushes a reference to the local ``co_varnames[var_num]`` onto the stack.
.. versionchanged:: 3.12
This opcode is now only used in situations where the local variable is
guaranteed to be initialized. It cannot raise :exc:`UnboundLocalError`.
.. opcode:: LOAD_FAST_CHECK (var_num)
Pushes a reference to the local ``co_varnames[var_num]`` onto the stack,
raising an :exc:`UnboundLocalError` if the local variable has not been
initialized.
.. versionadded:: 3.12
.. opcode:: STORE_FAST (var_num) .. opcode:: STORE_FAST (var_num)