bpo-30455: Generate all token related code and docs from Grammar/Toke…

…ns. (GH-10370)

"Include/token.h", "Lib/token.py" (containing now some data moved from
"Lib/tokenize.py") and new files "Parser/token.c" (containing the code
moved from "Parser/tokenizer.c") and "Doc/library/token-list.inc" (included
in "Doc/library/token.rst") are now generated from "Grammar/Tokens" by
"Tools/scripts/generate_token.py". The script overwrites files only if
needed and can be used on the read-only sources tree.

"Lib/symbol.py" is now generated by "Tools/scripts/generate_symbol_py.py"
instead of been executable itself.

Added new make targets "regen-token" and "regen-symbol" which are now
dependencies of "regen-all".

The documentation contains now strings for operators and punctuation tokens.

.gitattributes

@@ -55,3 +55,7 @@ Include/opcode.h            linguist-generated=true
Python/opcode_targets.h     linguist-generated=true
Objects/typeslots.inc       linguist-generated=true
Modules/unicodedata_db.h    linguist-generated=true
Doc/library/token-list.inc  linguist-generated=true
Include/token.h             linguist-generated=true
Lib/token.py                linguist-generated=true
Parser/token.c              linguist-generated=true

Doc/library/token.rst

@@ -44,64 +44,7 @@ functions.  The functions mirror definitions in the Python C header files.

The token constants are:

.. data:: ENDMARKER
          NAME
          NUMBER
          STRING
          NEWLINE
          INDENT
          DEDENT
          LPAR
          RPAR
          LSQB
          RSQB
          COLON
          COMMA
          SEMI
          PLUS
          MINUS
          STAR
          SLASH
          VBAR
          AMPER
          LESS
          GREATER
          EQUAL
          DOT
          PERCENT
          LBRACE
          RBRACE
          EQEQUAL
          NOTEQUAL
          LESSEQUAL
          GREATEREQUAL
          TILDE
          CIRCUMFLEX
          LEFTSHIFT
          RIGHTSHIFT
          DOUBLESTAR
          PLUSEQUAL
          MINEQUAL
          STAREQUAL
          SLASHEQUAL
          PERCENTEQUAL
          AMPEREQUAL
          VBAREQUAL
          CIRCUMFLEXEQUAL
          LEFTSHIFTEQUAL
          RIGHTSHIFTEQUAL
          DOUBLESTAREQUAL
          DOUBLESLASH
          DOUBLESLASHEQUAL
          AT
          ATEQUAL
          RARROW
          ELLIPSIS
          OP
          ERRORTOKEN
          N_TOKENS
          NT_OFFSET

.. include:: token-list.inc

The following token type values aren't used by the C tokenizer but are needed for
the :mod:`tokenize` module.

Grammar/Tokens

@@ -0,0 +1,62 @@
ENDMARKER
NAME
NUMBER
STRING
NEWLINE
INDENT
DEDENT

LPAR                    '('
RPAR                    ')'
LSQB                    '['
RSQB                    ']'
COLON                   ':'
COMMA                   ','
SEMI                    ';'
PLUS                    '+'
MINUS                   '-'
STAR                    '*'
SLASH                   '/'
VBAR                    '|'
AMPER                   '&'
LESS                    '<'
GREATER                 '>'
EQUAL                   '='
DOT                     '.'
PERCENT                 '%'
LBRACE                  '{'
RBRACE                  '}'
EQEQUAL                 '=='
NOTEQUAL                '!='
LESSEQUAL               '<='
GREATEREQUAL            '>='
TILDE                   '~'
CIRCUMFLEX              '^'
LEFTSHIFT               '<<'
RIGHTSHIFT              '>>'
DOUBLESTAR              '**'
PLUSEQUAL               '+='
MINEQUAL                '-='
STAREQUAL               '*='
SLASHEQUAL              '/='
PERCENTEQUAL            '%='
AMPEREQUAL              '&='
VBAREQUAL               '|='
CIRCUMFLEXEQUAL         '^='
LEFTSHIFTEQUAL          '<<='
RIGHTSHIFTEQUAL         '>>='
DOUBLESTAREQUAL         '**='
DOUBLESLASH             '//'
DOUBLESLASHEQUAL        '//='
AT                      '@'
ATEQUAL                 '@='
RARROW                  '->'
ELLIPSIS                '...'

OP
ERRORTOKEN

# These aren't used by the C tokenizer but are needed for tokenize.py
COMMENT
NL
ENCODING