djavu-asus/elpy/rpc-venv/lib/python3.11/site-packages/parso/python/grammar39.txt

   1 # Grammar for Python
   2
   3 # NOTE WELL: You should also follow all the steps listed at
   4 # https://devguide.python.org/grammar/
   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
  15 decorator: '@' namedexpr_test NEWLINE
  16 decorators: decorator+
  17 decorated: decorators (classdef | funcdef | async_funcdef)
  18
  19 async_funcdef: 'async' funcdef
  20 funcdef: 'def' NAME parameters ['->' test] ':' suite
  21
  22 parameters: '(' [typedargslist] ')'
  23 typedargslist: (
  24   (tfpdef ['=' test] (',' tfpdef ['=' test])* ',' '/' [',' [ tfpdef ['=' test] (
  25         ',' tfpdef ['=' test])* ([',' [
  26         '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  27       | '**' tfpdef [',']]])
  28   | '*' [tfpdef] (',' tfpdef ['=' test])* ([',' ['**' tfpdef [',']]])
  29   | '**' tfpdef [',']]] )
  30 |  (tfpdef ['=' test] (',' tfpdef ['=' test])* [',' [
  31         '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  32       | '**' tfpdef [',']]]
  33   | '*' [tfpdef] (',' tfpdef ['=' test])* [',' ['**' tfpdef [',']]]
  34   | '**' tfpdef [','])
  35 )
  36 tfpdef: NAME [':' test]
  37 varargslist: vfpdef ['=' test ](',' vfpdef ['=' test])* ',' '/' [',' [ (vfpdef ['=' test] (',' vfpdef ['=' test])* [',' [
  38         '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  39       | '**' vfpdef [',']]]
  40   | '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  41   | '**' vfpdef [',']) ]] | (vfpdef ['=' test] (',' vfpdef ['=' test])* [',' [
  42         '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  43       | '**' vfpdef [',']]]
  44   | '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
  45   | '**' vfpdef [',']
  46 )
  47 vfpdef: NAME
  48
  49 stmt: simple_stmt | compound_stmt | NEWLINE
  50 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
  51 small_stmt: (expr_stmt | del_stmt | pass_stmt | flow_stmt |
  52              import_stmt | global_stmt | nonlocal_stmt | assert_stmt)
  53 expr_stmt: testlist_star_expr (annassign | augassign (yield_expr|testlist) |
  54                      ('=' (yield_expr|testlist_star_expr))*)
  55 annassign: ':' test ['=' (yield_expr|testlist_star_expr)]
  56 testlist_star_expr: (test|star_expr) (',' (test|star_expr))* [',']
  57 augassign: ('+=' | '-=' | '*=' | '@=' | '/=' | '%=' | '&=' | '|=' | '^=' |
  58             '<<=' | '>>=' | '**=' | '//=')
  59 # For normal and annotated assignments, additional restrictions enforced by the interpreter
  60 del_stmt: 'del' exprlist
  61 pass_stmt: 'pass'
  62 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
  63 break_stmt: 'break'
  64 continue_stmt: 'continue'
  65 return_stmt: 'return' [testlist_star_expr]
  66 yield_stmt: yield_expr
  67 raise_stmt: 'raise' [test ['from' test]]
  68 import_stmt: import_name | import_from
  69 import_name: 'import' dotted_as_names
  70 # note below: the ('.' | '...') is necessary because '...' is tokenized as ELLIPSIS
  71 import_from: ('from' (('.' | '...')* dotted_name | ('.' | '...')+)
  72               'import' ('*' | '(' import_as_names ')' | import_as_names))
  73 import_as_name: NAME ['as' NAME]
  74 dotted_as_name: dotted_name ['as' NAME]
  75 import_as_names: import_as_name (',' import_as_name)* [',']
  76 dotted_as_names: dotted_as_name (',' dotted_as_name)*
  77 dotted_name: NAME ('.' NAME)*
  78 global_stmt: 'global' NAME (',' NAME)*
  79 nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
  80 assert_stmt: 'assert' test [',' test]
  81
  82 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | async_stmt
  83 async_stmt: 'async' (funcdef | with_stmt | for_stmt)
  84 if_stmt: 'if' namedexpr_test ':' suite ('elif' namedexpr_test ':' suite)* ['else' ':' suite]
  85 while_stmt: 'while' namedexpr_test ':' suite ['else' ':' suite]
  86 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
  87 try_stmt: ('try' ':' suite
  88            ((except_clause ':' suite)+
  89             ['else' ':' suite]
  90             ['finally' ':' suite] |
  91            'finally' ':' suite))
  92 with_stmt: 'with' with_item (',' with_item)*  ':' suite
  93 with_item: test ['as' expr]
  94 # NB compile.c makes sure that the default except clause is last
  95 except_clause: 'except' [test ['as' NAME]]
  96 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
  97
  98 namedexpr_test: test [':=' test]
  99 test: or_test ['if' or_test 'else' test] | lambdef
 100 lambdef: 'lambda' [varargslist] ':' test
 101 or_test: and_test ('or' and_test)*
 102 and_test: not_test ('and' not_test)*
 103 not_test: 'not' not_test | comparison
 104 comparison: expr (comp_op expr)*
 105 # <> isn't actually a valid comparison operator in Python. It's here for the
 106 # sake of a __future__ import described in PEP 401 (which really works :-)
 107 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'
 108 star_expr: '*' expr
 109 expr: xor_expr ('|' xor_expr)*
 110 xor_expr: and_expr ('^' and_expr)*
 111 and_expr: shift_expr ('&' shift_expr)*
 112 shift_expr: arith_expr (('<<'|'>>') arith_expr)*
 113 arith_expr: term (('+'|'-') term)*
 114 term: factor (('*'|'@'|'/'|'%'|'//') factor)*
 115 factor: ('+'|'-'|'~') factor | power
 116 power: atom_expr ['**' factor]
 117 atom_expr: ['await'] atom trailer*
 118 atom: ('(' [yield_expr|testlist_comp] ')' |
 119        '[' [testlist_comp] ']' |
 120        '{' [dictorsetmaker] '}' |
 121        NAME | NUMBER | strings | '...' | 'None' | 'True' | 'False')
 122 testlist_comp: (namedexpr_test|star_expr) ( comp_for | (',' (namedexpr_test|star_expr))* [','] )
 123 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
 124 subscriptlist: subscript (',' subscript)* [',']
 125 subscript: test | [test] ':' [test] [sliceop]
 126 sliceop: ':' [test]
 127 exprlist: (expr|star_expr) (',' (expr|star_expr))* [',']
 128 testlist: test (',' test)* [',']
 129 dictorsetmaker: ( ((test ':' test | '**' expr)
 130                    (comp_for | (',' (test ':' test | '**' expr))* [','])) |
 131                   ((test [':=' test] | star_expr)
 132                    (comp_for | (',' (test [':=' test] | star_expr))* [','])) )
 133
 134 classdef: 'class' NAME ['(' [arglist] ')'] ':' suite
 135
 136 arglist: argument (',' argument)*  [',']
 137
 138 # The reason that keywords are test nodes instead of NAME is that using NAME
 139 # results in an ambiguity. ast.c makes sure it's a NAME.
 140 # "test '=' test" is really "keyword '=' test", but we have no such token.
 141 # These need to be in a single rule to avoid grammar that is ambiguous
 142 # to our LL(1) parser. Even though 'test' includes '*expr' in star_expr,
 143 # we explicitly match '*' here, too, to give it proper precedence.
 144 # Illegal combinations and orderings are blocked in ast.c:
 145 # multiple (test comp_for) arguments are blocked; keyword unpackings
 146 # that precede iterable unpackings are blocked; etc.
 147 argument: ( test [comp_for] |
 148             test ':=' test |
 149             test '=' test |
 150             '**' test |
 151             '*' test )
 152
 153 comp_iter: comp_for | comp_if
 154 sync_comp_for: 'for' exprlist 'in' or_test [comp_iter]
 155 comp_for: ['async'] sync_comp_for
 156 comp_if: 'if' or_test [comp_iter]
 157
 158 # not used in grammar, but may appear in "node" passed from Parser to Compiler
 159 encoding_decl: NAME
 160
 161 yield_expr: 'yield' [yield_arg]
 162 yield_arg: 'from' test | testlist_star_expr
 163
 164 strings: (STRING | fstring)+
 165 fstring: FSTRING_START fstring_content* FSTRING_END
 166 fstring_content: FSTRING_STRING | fstring_expr
 167 fstring_conversion: '!' NAME
 168 fstring_expr: '{' (testlist_comp | yield_expr) ['='] [ fstring_conversion ] [ fstring_format_spec ] '}'
 169 fstring_format_spec: ':' fstring_content*