| Full Grammar specification | |
| ========================== | |
| This is the full Python grammar, derived directly from the grammar | |
| used to generate the CPython parser (see :source:`Grammar/python.gram`). | |
| The version here omits details related to code generation and | |
| error recovery. | |
| The notation is a mixture of `EBNF | |
| <https://en.wikipedia.org/wiki/Extended_Backus%E2%80%93Naur_form>`_ | |
| and `PEG <https://en.wikipedia.org/wiki/Parsing_expression_grammar>`_. | |
| In particular, ``&`` followed by a symbol, token or parenthesized | |
| group indicates a positive lookahead (i.e., is required to match but | |
| not consumed), while ``!`` indicates a negative lookahead (i.e., is | |
| required _not_ to match). We use the ``|`` separator to mean PEG's | |
| "ordered choice" (written as ``/`` in traditional PEG grammars). | |
| .. literalinclude:: ../../Grammar/python.gram | |
| :language: peg |