Lichen

pyparser/data/Grammar2.5

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 # Commands for Kees Blom's railroad program    14 #diagram:token NAME    15 #diagram:token NUMBER    16 #diagram:token STRING    17 #diagram:token NEWLINE    18 #diagram:token ENDMARKER    19 #diagram:token INDENT    20 #diagram:output\input python.bla    21 #diagram:token DEDENT    22 #diagram:output\textwidth 20.04cm\oddsidemargin  0.0cm\evensidemargin 0.0cm    23 #diagram:rules    24     25 # Start symbols for the grammar:    26 #	single_input is a single interactive statement;    27 #	file_input is a module or sequence of commands read from an input file;    28 #	eval_input is the input for the eval() and input() functions.    29 # NB: compound_stmt in single_input is followed by extra NEWLINE!    30 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE    31 file_input: (NEWLINE | stmt)* ENDMARKER    32 eval_input: testlist NEWLINE* ENDMARKER    33     34 decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE    35 decorators: decorator+    36 funcdef: [decorators] 'def' NAME parameters ':' suite    37 parameters: '(' [varargslist] ')'    38 varargslist: ((fpdef ['=' test] ',')*    39               ('*' NAME [',' '**' NAME] | '**' NAME) |    40               fpdef ['=' test] (',' fpdef ['=' test])* [','])    41 fpdef: NAME | '(' fplist ')'    42 fplist: fpdef (',' fpdef)* [',']    43     44 stmt: simple_stmt | compound_stmt    45 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE    46 small_stmt: (expr_stmt | print_stmt  | del_stmt | pass_stmt | flow_stmt |    47              import_stmt | global_stmt | exec_stmt | assert_stmt)    48 expr_stmt: testlist (augassign (yield_expr|testlist) |    49                      ('=' (yield_expr|testlist))*)    50 augassign: ('+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' |    51             '<<=' | '>>=' | '**=' | '//=')    52 # For normal assignments, additional restrictions enforced by the interpreter    53 print_stmt: 'print' ( [ test (',' test)* [','] ] |    54                       '>>' test [ (',' test)+ [','] ] )    55 del_stmt: 'del' exprlist    56 pass_stmt: 'pass'    57 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt    58 break_stmt: 'break'    59 continue_stmt: 'continue'    60 return_stmt: 'return' [testlist]    61 yield_stmt: yield_expr    62 raise_stmt: 'raise' [test [',' test [',' test]]]    63 import_stmt: import_name | import_from    64 import_name: 'import' dotted_as_names    65 import_from: ('from' ('.'* dotted_name | '.'+)    66               'import' ('*' | '(' import_as_names ')' | import_as_names))    67 import_as_name: NAME [('as' | NAME) NAME]    68 dotted_as_name: dotted_name [('as' | NAME) NAME]    69 import_as_names: import_as_name (',' import_as_name)* [',']    70 dotted_as_names: dotted_as_name (',' dotted_as_name)*    71 dotted_name: NAME ('.' NAME)*    72 global_stmt: 'global' NAME (',' NAME)*    73 exec_stmt: 'exec' expr ['in' test [',' test]]    74 assert_stmt: 'assert' test [',' test]    75     76 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef    77 if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]    78 while_stmt: 'while' test ':' suite ['else' ':' suite]    79 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]    80 try_stmt: ('try' ':' suite    81            ((except_clause ':' suite)+    82 	    ['else' ':' suite]    83 	    ['finally' ':' suite] |    84 	   'finally' ':' suite))    85 with_stmt: 'with' test [ with_var ] ':' suite    86 with_var: ('as' | NAME) expr    87 # NB compile.c makes sure that the default except clause is last    88 except_clause: 'except' [test [',' test]]    89 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT    90     91 # Backward compatibility cruft to support:    92 # [ x for x in lambda: True, lambda: False if x() ]    93 # even while also allowing:    94 # lambda x: 5 if x else 2    95 # (But not a mix of the two)    96 testlist_safe: old_test [(',' old_test)+ [',']]    97 old_test: or_test | old_lambdef    98 old_lambdef: 'lambda' [varargslist] ':' old_test    99    100 test: or_test ['if' or_test 'else' test] | lambdef   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 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'   106 expr: xor_expr ('|' xor_expr)*   107 xor_expr: and_expr ('^' and_expr)*   108 and_expr: shift_expr ('&' shift_expr)*   109 shift_expr: arith_expr (('<<'|'>>') arith_expr)*   110 arith_expr: term (('+'|'-') term)*   111 term: factor (('*'|'/'|'%'|'//') factor)*   112 factor: ('+'|'-'|'~') factor | power   113 power: atom trailer* ['**' factor]   114 atom: ('(' [yield_expr|testlist_gexp] ')' |   115        '[' [listmaker] ']' |   116        '{' [dictmaker] '}' |   117        '`' testlist1 '`' |   118        NAME | NUMBER | STRING+)   119 listmaker: test ( list_for | (',' test)* [','] )   120 testlist_gexp: test ( gen_for | (',' test)* [','] )   121 lambdef: 'lambda' [varargslist] ':' test   122 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME   123 subscriptlist: subscript (',' subscript)* [',']   124 subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop]   125 sliceop: ':' [test]   126 exprlist: expr (',' expr)* [',']   127 testlist: test (',' test)* [',']   128 dictmaker: test ':' test (',' test ':' test)* [',']   129    130 classdef: 'class' NAME ['(' [testlist] ')'] ':' suite   131    132 arglist: (argument ',')* (argument [',']| '*' test [',' '**' test] | '**' test)   133 argument: test [gen_for] | test '=' test  # Really [keyword '='] test   134    135 list_iter: list_for | list_if   136 list_for: 'for' exprlist 'in' testlist_safe [list_iter]   137 list_if: 'if' old_test [list_iter]   138    139 gen_iter: gen_for | gen_if   140 gen_for: 'for' exprlist 'in' or_test [gen_iter]   141 gen_if: 'if' old_test [gen_iter]   142    143 testlist1: test (',' test)*   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' [testlist]