djavu-asus/emacs/elpy/rpc-venv/lib/python3.11/site-packages/parso/python/grammar36.txt

   1 # Grammar for Python
   2
   3 # NOTE WELL: You should also follow all the steps listed at
   4 # https://docs.python.org/devguide/grammar.html
   5
   6 # Start symbols for the grammar:
   7 #       single_input is a single interactive statement;
   8 #       file_input is a module or sequence of commands read from an input file;
   9 #       eval_input is the input for the eval() functions.
  10 # NB: compound_stmt in single_input is followed by extra NEWLINE!
  11 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE
  12 file_input: stmt* ENDMARKER
  13 eval_input: testlist NEWLINE* ENDMARKER
  14 decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
  15 decorators: decorator+
  16 decorated: decorators (classdef | funcdef | async_funcdef)
  17
  18 # NOTE: Francisco Souza/Reinoud Elhorst, using ASYNC/'await' keywords instead of
  19 # skipping python3.5+ compatibility, in favour of 3.7 solution
  20 async_funcdef: 'async' funcdef
  21 funcdef: 'def' NAME parameters ['->' test] ':' suite
  22
  23 parameters: '(' [typedargslist] ')'
  24 typedargslist: (tfpdef ['=' test] (',' tfpdef ['=' test])* [',' [
  25         '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  26       | '**' tfpdef [',']]]
  27   | '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  28   | '**' tfpdef [','])
  29 tfpdef: NAME [':' test]
  30 varargslist: (vfpdef ['=' test] (',' vfpdef ['=' test])* [',' [
  31         '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  32       | '**' vfpdef [',']]]
  33   | '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  34   | '**' vfpdef [',']
  35 )
  36 vfpdef: NAME
  37
  38 stmt: simple_stmt | compound_stmt | NEWLINE
  39 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
  40 small_stmt: (expr_stmt | del_stmt | pass_stmt | flow_stmt |
  41              import_stmt | global_stmt | nonlocal_stmt | assert_stmt)
  42 expr_stmt: testlist_star_expr (annassign | augassign (yield_expr|testlist) |
  43                      ('=' (yield_expr|testlist_star_expr))*)
  44 annassign: ':' test ['=' test]
  45 testlist_star_expr: (test|star_expr) (',' (test|star_expr))* [',']
  46 augassign: ('+=' | '-=' | '*=' | '@=' | '/=' | '%=' | '&=' | '|=' | '^=' |
  47             '<<=' | '>>=' | '**=' | '//=')
  48 # For normal and annotated assignments, additional restrictions enforced by the interpreter
  49 del_stmt: 'del' exprlist
  50 pass_stmt: 'pass'
  51 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
  52 break_stmt: 'break'
  53 continue_stmt: 'continue'
  54 return_stmt: 'return' [testlist]
  55 yield_stmt: yield_expr
  56 raise_stmt: 'raise' [test ['from' test]]
  57 import_stmt: import_name | import_from
  58 import_name: 'import' dotted_as_names
  59 # note below: the ('.' | '...') is necessary because '...' is tokenized as ELLIPSIS
  60 import_from: ('from' (('.' | '...')* dotted_name | ('.' | '...')+)
  61               'import' ('*' | '(' import_as_names ')' | import_as_names))
  62 import_as_name: NAME ['as' NAME]
  63 dotted_as_name: dotted_name ['as' NAME]
  64 import_as_names: import_as_name (',' import_as_name)* [',']
  65 dotted_as_names: dotted_as_name (',' dotted_as_name)*
  66 dotted_name: NAME ('.' NAME)*
  67 global_stmt: 'global' NAME (',' NAME)*
  68 nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
  69 assert_stmt: 'assert' test [',' test]
  70
  71 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | async_stmt
  72 async_stmt: 'async' (funcdef | with_stmt | for_stmt)
  73 if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
  74 while_stmt: 'while' test ':' suite ['else' ':' suite]
  75 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
  76 try_stmt: ('try' ':' suite
  77            ((except_clause ':' suite)+
  78             ['else' ':' suite]
  79             ['finally' ':' suite] |
  80            'finally' ':' suite))
  81 with_stmt: 'with' with_item (',' with_item)*  ':' suite
  82 with_item: test ['as' expr]
  83 # NB compile.c makes sure that the default except clause is last
  84 except_clause: 'except' [test ['as' NAME]]
  85 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
  86
  87 test: or_test ['if' or_test 'else' test] | lambdef
  88 test_nocond: or_test | lambdef_nocond
  89 lambdef: 'lambda' [varargslist] ':' test
  90 lambdef_nocond: 'lambda' [varargslist] ':' test_nocond
  91 or_test: and_test ('or' and_test)*
  92 and_test: not_test ('and' not_test)*
  93 not_test: 'not' not_test | comparison
  94 comparison: expr (comp_op expr)*
  95 # <> isn't actually a valid comparison operator in Python. It's here for the
  96 # sake of a __future__ import described in PEP 401 (which really works :-)
  97 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'
  98 star_expr: '*' expr
  99 expr: xor_expr ('|' xor_expr)*
 100 xor_expr: and_expr ('^' and_expr)*
 101 and_expr: shift_expr ('&' shift_expr)*
 102 shift_expr: arith_expr (('<<'|'>>') arith_expr)*
 103 arith_expr: term (('+'|'-') term)*
 104 term: factor (('*'|'@'|'/'|'%'|'//') factor)*
 105 factor: ('+'|'-'|'~') factor | power
 106 power: atom_expr ['**' factor]
 107 atom_expr: ['await'] atom trailer*
 108 atom: ('(' [yield_expr|testlist_comp] ')' |
 109        '[' [testlist_comp] ']' |
 110        '{' [dictorsetmaker] '}' |
 111        NAME | NUMBER | strings | '...' | 'None' | 'True' | 'False')
 112 testlist_comp: (test|star_expr) ( comp_for | (',' (test|star_expr))* [','] )
 113 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
 114 subscriptlist: subscript (',' subscript)* [',']
 115 subscript: test | [test] ':' [test] [sliceop]
 116 sliceop: ':' [test]
 117 exprlist: (expr|star_expr) (',' (expr|star_expr))* [',']
 118 testlist: test (',' test)* [',']
 119 dictorsetmaker: ( ((test ':' test | '**' expr)
 120                    (comp_for | (',' (test ':' test | '**' expr))* [','])) |
 121                   ((test | star_expr)
 122                    (comp_for | (',' (test | star_expr))* [','])) )
 123
 124 classdef: 'class' NAME ['(' [arglist] ')'] ':' suite
 125
 126 arglist: argument (',' argument)*  [',']
 127
 128 # The reason that keywords are test nodes instead of NAME is that using NAME
 129 # results in an ambiguity. ast.c makes sure it's a NAME.
 130 # "test '=' test" is really "keyword '=' test", but we have no such token.
 131 # These need to be in a single rule to avoid grammar that is ambiguous
 132 # to our LL(1) parser. Even though 'test' includes '*expr' in star_expr,
 133 # we explicitly match '*' here, too, to give it proper precedence.
 134 # Illegal combinations and orderings are blocked in ast.c:
 135 # multiple (test comp_for) arguments are blocked; keyword unpackings
 136 # that precede iterable unpackings are blocked; etc.
 137 argument: ( test [comp_for] |
 138             test '=' test |
 139             '**' test |
 140             '*' test )
 141
 142 comp_iter: comp_for | comp_if
 143 sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
 144 comp_for: ['async'] sync_comp_for
 145 comp_if: 'if' test_nocond [comp_iter]
 146
 147 # not used in grammar, but may appear in "node" passed from Parser to Compiler
 148 encoding_decl: NAME
 149
 150 yield_expr: 'yield' [yield_arg]
 151 yield_arg: 'from' test | testlist
 152
 153 strings: (STRING | fstring)+
 154 fstring: FSTRING_START fstring_content* FSTRING_END
 155 fstring_content: FSTRING_STRING | fstring_expr
 156 fstring_conversion: '!' NAME
 157 fstring_expr: '{' (testlist_comp | yield_expr) [ fstring_conversion ] [ fstring_format_spec ] '}'
 158 fstring_format_spec: ':' fstring_content*