djavu-asus/elpy/rpc-venv/lib/python3.11/site-packages/parso/python/grammar37.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 async_funcdef: 'async' funcdef
  19 funcdef: 'def' NAME parameters ['->' test] ':' suite
  20
  21 parameters: '(' [typedargslist] ')'
  22 typedargslist: (tfpdef ['=' test] (',' tfpdef ['=' test])* [',' [
  23         '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  24       | '**' tfpdef [',']]]
  25   | '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  26   | '**' tfpdef [','])
  27 tfpdef: NAME [':' test]
  28 varargslist: (vfpdef ['=' test] (',' vfpdef ['=' test])* [',' [
  29         '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  30       | '**' vfpdef [',']]]
  31   | '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  32   | '**' vfpdef [',']
  33 )
  34 vfpdef: NAME
  35
  36 stmt: simple_stmt | compound_stmt | NEWLINE
  37 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
  38 small_stmt: (expr_stmt | del_stmt | pass_stmt | flow_stmt |
  39              import_stmt | global_stmt | nonlocal_stmt | assert_stmt)
  40 expr_stmt: testlist_star_expr (annassign | augassign (yield_expr|testlist) |
  41                      ('=' (yield_expr|testlist_star_expr))*)
  42 annassign: ':' test ['=' test]
  43 testlist_star_expr: (test|star_expr) (',' (test|star_expr))* [',']
  44 augassign: ('+=' | '-=' | '*=' | '@=' | '/=' | '%=' | '&=' | '|=' | '^=' |
  45             '<<=' | '>>=' | '**=' | '//=')
  46 # For normal and annotated assignments, additional restrictions enforced by the interpreter
  47 del_stmt: 'del' exprlist
  48 pass_stmt: 'pass'
  49 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
  50 break_stmt: 'break'
  51 continue_stmt: 'continue'
  52 return_stmt: 'return' [testlist]
  53 yield_stmt: yield_expr
  54 raise_stmt: 'raise' [test ['from' test]]
  55 import_stmt: import_name | import_from
  56 import_name: 'import' dotted_as_names
  57 # note below: the ('.' | '...') is necessary because '...' is tokenized as ELLIPSIS
  58 import_from: ('from' (('.' | '...')* dotted_name | ('.' | '...')+)
  59               'import' ('*' | '(' import_as_names ')' | import_as_names))
  60 import_as_name: NAME ['as' NAME]
  61 dotted_as_name: dotted_name ['as' NAME]
  62 import_as_names: import_as_name (',' import_as_name)* [',']
  63 dotted_as_names: dotted_as_name (',' dotted_as_name)*
  64 dotted_name: NAME ('.' NAME)*
  65 global_stmt: 'global' NAME (',' NAME)*
  66 nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
  67 assert_stmt: 'assert' test [',' test]
  68
  69 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | async_stmt
  70 async_stmt: 'async' (funcdef | with_stmt | for_stmt)
  71 if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
  72 while_stmt: 'while' test ':' suite ['else' ':' suite]
  73 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
  74 try_stmt: ('try' ':' suite
  75            ((except_clause ':' suite)+
  76             ['else' ':' suite]
  77             ['finally' ':' suite] |
  78            'finally' ':' suite))
  79 with_stmt: 'with' with_item (',' with_item)*  ':' suite
  80 with_item: test ['as' expr]
  81 # NB compile.c makes sure that the default except clause is last
  82 except_clause: 'except' [test ['as' NAME]]
  83 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
  84
  85 test: or_test ['if' or_test 'else' test] | lambdef
  86 test_nocond: or_test | lambdef_nocond
  87 lambdef: 'lambda' [varargslist] ':' test
  88 lambdef_nocond: 'lambda' [varargslist] ':' test_nocond
  89 or_test: and_test ('or' and_test)*
  90 and_test: not_test ('and' not_test)*
  91 not_test: 'not' not_test | comparison
  92 comparison: expr (comp_op expr)*
  93 # <> isn't actually a valid comparison operator in Python. It's here for the
  94 # sake of a __future__ import described in PEP 401 (which really works :-)
  95 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'
  96 star_expr: '*' expr
  97 expr: xor_expr ('|' xor_expr)*
  98 xor_expr: and_expr ('^' and_expr)*
  99 and_expr: shift_expr ('&' shift_expr)*
 100 shift_expr: arith_expr (('<<'|'>>') arith_expr)*
 101 arith_expr: term (('+'|'-') term)*
 102 term: factor (('*'|'@'|'/'|'%'|'//') factor)*
 103 factor: ('+'|'-'|'~') factor | power
 104 power: atom_expr ['**' factor]
 105 atom_expr: ['await'] atom trailer*
 106 atom: ('(' [yield_expr|testlist_comp] ')' |
 107        '[' [testlist_comp] ']' |
 108        '{' [dictorsetmaker] '}' |
 109        NAME | NUMBER | strings | '...' | 'None' | 'True' | 'False')
 110 testlist_comp: (test|star_expr) ( comp_for | (',' (test|star_expr))* [','] )
 111 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
 112 subscriptlist: subscript (',' subscript)* [',']
 113 subscript: test | [test] ':' [test] [sliceop]
 114 sliceop: ':' [test]
 115 exprlist: (expr|star_expr) (',' (expr|star_expr))* [',']
 116 testlist: test (',' test)* [',']
 117 dictorsetmaker: ( ((test ':' test | '**' expr)
 118                    (comp_for | (',' (test ':' test | '**' expr))* [','])) |
 119                   ((test | star_expr)
 120                    (comp_for | (',' (test | star_expr))* [','])) )
 121
 122 classdef: 'class' NAME ['(' [arglist] ')'] ':' suite
 123
 124 arglist: argument (',' argument)*  [',']
 125
 126 # The reason that keywords are test nodes instead of NAME is that using NAME
 127 # results in an ambiguity. ast.c makes sure it's a NAME.
 128 # "test '=' test" is really "keyword '=' test", but we have no such token.
 129 # These need to be in a single rule to avoid grammar that is ambiguous
 130 # to our LL(1) parser. Even though 'test' includes '*expr' in star_expr,
 131 # we explicitly match '*' here, too, to give it proper precedence.
 132 # Illegal combinations and orderings are blocked in ast.c:
 133 # multiple (test comp_for) arguments are blocked; keyword unpackings
 134 # that precede iterable unpackings are blocked; etc.
 135 argument: ( test [comp_for] |
 136             test '=' test |
 137             '**' test |
 138             '*' test )
 139
 140 comp_iter: comp_for | comp_if
 141 sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
 142 comp_for: ['async'] sync_comp_for
 143 comp_if: 'if' test_nocond [comp_iter]
 144
 145 # not used in grammar, but may appear in "node" passed from Parser to Compiler
 146 encoding_decl: NAME
 147
 148 yield_expr: 'yield' [yield_arg]
 149 yield_arg: 'from' test | testlist
 150
 151 strings: (STRING | fstring)+
 152 fstring: FSTRING_START fstring_content* FSTRING_END
 153 fstring_content: FSTRING_STRING | fstring_expr
 154 fstring_conversion: '!' NAME
 155 fstring_expr: '{' (testlist_comp | yield_expr) [ fstring_conversion ] [ fstring_format_spec ] '}'
 156 fstring_format_spec: ':' fstring_content*