Lichen

pyparser/data/Grammar-Lichen

819:5e73c8cae40c
2018-01-08 Paul Boddie Support instance attribute initialisation using a method parameter notation.
     1 # Grammar for Lichen     2      3 # Start symbols for the grammar:     4 #	single_input is a single interactive statement;     5 #	file_input is a module or sequence of commands read from an input file;     6 #	eval_input is the input for the eval() and input() functions.     7 # NB: compound_stmt in single_input is followed by extra NEWLINE!     8 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE     9 file_input: (NEWLINE | stmt)* ENDMARKER    10 eval_input: testlist NEWLINE* ENDMARKER    11     12 funcdef: 'def' NAME parameters ':' suite    13 parameters: '(' [varargslist] ')'    14 # NOTE: Remove * and ** support.    15 varargslist: ((fpdef ['=' test] ',')*    16               ('*' NAME [',' '**' NAME] | '**' NAME) |    17               fpdef ['=' test] (',' fpdef ['=' test])* [','])    18 # NOTE: Replace with flat parameter lists?    19 # Supporting .name for attribute assignment convenience.    20 fpdef: NAME | '.' NAME | '(' fplist ')'    21 fplist: fpdef (',' fpdef)* [',']    22     23 stmt: simple_stmt | compound_stmt    24 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE    25 small_stmt: (expr_stmt | print_stmt  | del_stmt | pass_stmt | flow_stmt |    26              import_stmt | global_stmt | exec_stmt | assert_stmt)    27 expr_stmt: testlist (augassign testlist |    28                      ('=' testlist)*)    29 augassign: ('+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' |    30             '<<=' | '>>=' | '**=' | '//=')    31 # For normal assignments, additional restrictions enforced by the interpreter    32 print_stmt: 'print' ( [ test (',' test)* [','] ] |    33                       '>>' test [ (',' test)+ [','] ] )    34 del_stmt: 'del' exprlist    35 pass_stmt: 'pass'    36 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt    37 break_stmt: 'break'    38 continue_stmt: 'continue'    39 return_stmt: 'return' [testlist]    40 raise_stmt: 'raise' [test [',' test [',' test]]]    41 import_stmt: import_name | import_from    42 import_name: 'import' dotted_as_names    43 import_from: ('from' dotted_name    44               'import' ('*' | '(' import_as_names ')' | import_as_names))    45 import_as_name: NAME ['as' NAME]    46 dotted_as_name: dotted_name ['as' NAME]    47 import_as_names: import_as_name (',' import_as_name)* [',']    48 dotted_as_names: dotted_as_name (',' dotted_as_name)*    49 dotted_name: NAME ('.' NAME)*    50 global_stmt: 'global' NAME (',' NAME)*    51 exec_stmt: 'exec' expr ['in' test [',' test]]    52 assert_stmt: 'assert' test [',' test]    53     54 compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef    55 if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]    56 while_stmt: 'while' test ':' suite ['else' ':' suite]    57 for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]    58 try_stmt: ('try' ':' suite    59            ((except_clause ':' suite)+    60 	    ['else' ':' suite]    61 	    ['finally' ':' suite] |    62 	   'finally' ':' suite))    63 # NB compile.c makes sure that the default except clause is last    64 except_clause: 'except' [test [('as' | ',') test]]    65 suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT    66     67 # Backward compatibility cruft to support:    68 # [ x for x in lambda: True, lambda: False if x() ]    69 # even while also allowing:    70 # lambda x: 5 if x else 2    71 # (But not a mix of the two)    72 testlist_safe: old_test [(',' old_test)+ [',']]    73 old_test: or_test | old_lambdef    74 old_lambdef: 'lambda' [varargslist] ':' old_test    75     76 test: or_test | lambdef    77 or_test: and_test ('or' and_test)*    78 and_test: not_test ('and' not_test)*    79 not_test: 'not' not_test | comparison    80 comparison: expr (comp_op expr)*    81 comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not'    82 expr: xor_expr ('|' xor_expr)*    83 xor_expr: and_expr ('^' and_expr)*    84 and_expr: shift_expr ('&' shift_expr)*    85 shift_expr: arith_expr (('<<'|'>>') arith_expr)*    86 arith_expr: term (('+'|'-') term)*    87 term: factor (('*'|'/'|'%'|'//') factor)*    88 factor: ('+'|'-'|'~') factor | power    89 power: atom trailer* ['**' factor]    90 atom: ('(' [testlist_comp] ')' |    91        '[' [listmaker] ']' |    92        '{' [dictorsetmaker] '}' |    93        '`' testlist1 '`' |    94        NAME | NUMBER | STRING+)    95 listmaker: test ( (',' test)* [','] )    96 testlist_comp: test ( (',' test)* [','] )    97 lambdef: 'lambda' [varargslist] ':' test    98 trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME    99 subscriptlist: subscript (',' subscript)* [',']   100 subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop]   101 sliceop: ':' [test]   102 exprlist: expr (',' expr)* [',']   103 testlist: test (',' test)* [',']   104 dictmaker: test ':' test (',' test ':' test)* [',']   105 dictorsetmaker: ( (test ':' test ( (',' test ':' test)* [','])) |   106                   (test ( (',' test)* [','])) )   107    108 classdef: 'class' NAME ['(' [testlist] ')'] ':' suite   109    110 arglist: (argument ',')* (argument [',']   111                          |'*' test (',' argument)* [',' '**' test]    112                          |'**' test)   113 # The reason that keywords are test nodes instead of NAME is that using NAME   114 # results in an ambiguity. ast.c makes sure it's a NAME.   115 argument: test | test '=' test   116    117 testlist1: test (',' test)*   118    119 # not used in grammar, but may appear in "node" passed from Parser to Compiler   120 encoding_decl: NAME