Lichen

pyparser/data/Grammar2.7

904:938887b82033
2019-06-02 Paul Boddie Prevent "null" usage of assigned names from escaping via the exception handler.
     1 # Grammar for Python     2      3 # Note:  Changing the grammar specified in this file will most likely     4 #        require corresponding changes in the parser module     5 #        (../Modules/parsermodule.c).  If you can't make the changes to     6 #        that module yourself, please co-ordinate the required changes     7 #        with someone who can; ask around on python-dev for help.  Fred     8 #        Drake <fdrake@acm.org> will probably be listening there.     9     10 # NOTE WELL: You should also follow all the steps listed in PEP 306,    11 # "How to Change Python's Grammar"    12     13 # Start symbols for the grammar:    14 #	single_input is a single interactive statement;    15 #	file_input is a module or sequence of commands read from an input file;    16 #	eval_input is the input for the eval() and input() functions.    17 # NB: compound_stmt in single_input is followed by extra NEWLINE!    18 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE    19 file_input: (NEWLINE | stmt)* ENDMARKER    20 eval_input: testlist NEWLINE* ENDMARKER    21     22 decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE    23 decorators: decorator+    24 decorated: decorators (classdef | funcdef)    25 funcdef: 'def' NAME parameters ':' suite    26 parameters: '(' [varargslist] ')'    27 varargslist: ((fpdef ['=' test] ',')*    28               ('*' NAME [',' '**' NAME] | '**' NAME) |    29               fpdef ['=' test] (',' fpdef ['=' test])* [','])    30 fpdef: NAME | '(' fplist ')'    31 fplist: fpdef (',' fpdef)* [',']    32     33 stmt: simple_stmt | compound_stmt    34 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE    35 small_stmt: (expr_stmt | print_stmt  | del_stmt | pass_stmt | flow_stmt |    36              import_stmt | global_stmt | exec_stmt | assert_stmt)    37 expr_stmt: testlist (augassign (yield_expr|testlist) |    38                      ('=' (yield_expr|testlist))*)    39 augassign: ('+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' |    40             '<<=' | '>>=' | '**=' | '//=')    41 # For normal assignments, additional restrictions enforced by the interpreter    42 print_stmt: 'print' ( [ test (',' test)* [','] ] |    43                       '>>' test [ (',' test)+ [','] ] )    44 del_stmt: 'del' exprlist    45 pass_stmt: 'pass'    46 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt    47 break_stmt: 'break'    48 continue_stmt: 'continue'    49 return_stmt: 'return' [testlist]    50 yield_stmt: yield_expr    51 raise_stmt: 'raise' [test [',' test [',' test]]]    52 import_stmt: import_name | import_from    53 import_name: 'import' dotted_as_names    54 import_from: ('from' ('.'* dotted_name | '.'+)    55               'import' ('*' | '(' import_as_names ')' | import_as_names))    56 import_as_name: NAME ['as' NAME]    57 dotted_as_name: dotted_name ['as' NAME]    58 import_as_names: import_as_name (',' import_as_name)* [',']    59 dotted_as_names: dotted_as_name (',' dotted_as_name)*    60 dotted_name: NAME ('.' NAME)*    61 global_stmt: 'global' NAME (',' NAME)*    62 exec_stmt: 'exec' expr ['in' test [',' test]]    63 assert_stmt: 'assert' test [',' test]    64     65 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated    66 if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]    67 while_stmt: 'while' test ':' suite ['else' ':' suite]    68 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]    69 try_stmt: ('try' ':' suite    70            ((except_clause ':' suite)+    71 	    ['else' ':' suite]    72 	    ['finally' ':' suite] |    73 	   'finally' ':' suite))    74 with_stmt: 'with' with_item (',' with_item)*  ':' suite    75 with_item: test ['as' expr]    76 # NB compile.c makes sure that the default except clause is last    77 except_clause: 'except' [test [('as' | ',') test]]    78 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT    79     80 # Backward compatibility cruft to support:    81 # [ x for x in lambda: True, lambda: False if x() ]    82 # even while also allowing:    83 # lambda x: 5 if x else 2    84 # (But not a mix of the two)    85 testlist_safe: old_test [(',' old_test)+ [',']]    86 old_test: or_test | old_lambdef    87 old_lambdef: 'lambda' [varargslist] ':' old_test    88     89 test: or_test ['if' or_test 'else' test] | lambdef    90 or_test: and_test ('or' and_test)*    91 and_test: not_test ('and' not_test)*    92 not_test: 'not' not_test | comparison    93 comparison: expr (comp_op expr)*    94 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'    95 expr: xor_expr ('|' xor_expr)*    96 xor_expr: and_expr ('^' and_expr)*    97 and_expr: shift_expr ('&' shift_expr)*    98 shift_expr: arith_expr (('<<'|'>>') arith_expr)*    99 arith_expr: term (('+'|'-') term)*   100 term: factor (('*'|'/'|'%'|'//') factor)*   101 factor: ('+'|'-'|'~') factor | power   102 power: atom trailer* ['**' factor]   103 atom: ('(' [yield_expr|testlist_comp] ')' |   104        '[' [listmaker] ']' |   105        '{' [dictorsetmaker] '}' |   106        '`' testlist1 '`' |   107        NAME | NUMBER | STRING+)   108 listmaker: test ( list_for | (',' test)* [','] )   109 testlist_comp: test ( comp_for | (',' test)* [','] )   110 lambdef: 'lambda' [varargslist] ':' test   111 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME   112 subscriptlist: subscript (',' subscript)* [',']   113 subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop]   114 sliceop: ':' [test]   115 exprlist: expr (',' expr)* [',']   116 testlist: test (',' test)* [',']   117 dictmaker: test ':' test (',' test ':' test)* [',']   118 dictorsetmaker: ( (test ':' test (comp_for | (',' test ':' test)* [','])) |   119                   (test (comp_for | (',' test)* [','])) )   120    121 classdef: 'class' NAME ['(' [testlist] ')'] ':' suite   122    123 arglist: (argument ',')* (argument [',']   124                          |'*' test (',' argument)* [',' '**' test]    125                          |'**' test)   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 argument: test [comp_for] | test '=' test   129    130 list_iter: list_for | list_if   131 list_for: 'for' exprlist 'in' testlist_safe [list_iter]   132 list_if: 'if' old_test [list_iter]   133    134 comp_iter: comp_for | comp_if   135 comp_for: 'for' exprlist 'in' or_test [comp_iter]   136 comp_if: 'if' old_test [comp_iter]   137    138 testlist1: test (',' test)*   139    140 # not used in grammar, but may appear in "node" passed from Parser to Compiler   141 encoding_decl: NAME   142    143 yield_expr: 'yield' [testlist]