peps: 16f60cd918e0 (original) (raw)

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changeset 6212:16f60cd918e0

PEP 511 Remove changes already merged into CPython: * code.co_lnotab: support negative line number delta https://bugs.python.org/issue26107 * enhance compiler to handle correctly tuple and frozenset constants http://bugs.python.org/issue25843 * ast.Constant: http://bugs.python.org/issue26146 * enhance marshal to use the empty frozenset singleton http://bugs.python.org/issue26146 These changes were not directly related to this PEP, but more generally enhancements to write AST code transformers (especially AST optimizers).

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--- a/pep-0511.txt +++ b/pep-0511.txt @@ -314,7 +314,6 @@ In short, add:

• sys.implementation.optim_tag
• sys.get_code_transformers()
• sys.set_code_transformers(transformers) -* ast.Constant
• ast.PyCF_TRANSFORMED_AST @@ -406,20 +405,6 @@ Enhancements to simplify the implementat
• Add a new compiler flag PyCF_TRANSFORMED_AST to get the transformed AST. PyCF_ONLY_AST returns the AST before the transformers. -* Add ast.Constant: this type is not emited by the compiler, but

• can be used in an AST transformer to simplify the code. It does not
• contain line number and column offset informations on tuple or
• frozenset items. -* PyCodeObject.co_lnotab: line number delta becomes signed to
• support moving instructions (note: need to modify MAGIC_NUMBER in
• importlib). Implemented in the `issue #26107
• https://bugs.python.org/issue26107`_ -* Enhance the bytecode compiler to support tuple and frozenset
• constants. Currently, tuple and frozenset constants are
• created by the peephole transformer, after the bytecode compilation. -* marshal module: fix serialization of the empty frozenset singleton -* update Tools/parser/unparse.py to support the new ast.Constant
• node type Examples