@builtin "number.ne"
@builtin "whitespace.ne"
@builtin "string.ne"
main -> atom
#single_input -> NEWLINE | simple_stmt | compound_stmt NEWLINE
# file_input -> (NEWLINE | stmt)* ENDMARKER
# eval_input -> testlist NEWLINE* ENDMARKER
# 
# funcdef -> 'def' NAME parameters ':' suite
# parameters -> '(' [varargslist] ')'
# varargslist -> (fpdef ',')* '*' NAME | fpdef (',' fpdef)* [',']
# fpdef -> NAME | '(' fplist ')'
# fplist -> fpdef (',' fpdef)* [',']
# 
#stmt -> simple_stmt | compound_stmt
#simple_stmt -> small_stmt (';' small_stmt)* ';' NEWLINE
# small_stmt -> expr_stmt | print_stmt  | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | access_stmt | exec_stmt
# expr_stmt -> (testlist '=')* testlist
# 
# print_stmt -> 'print' (test ',')* [test]
# del_stmt -> 'del' exprlist
# pass_stmt -> 'pass'
# flow_stmt -> break_stmt | continue_stmt | return_stmt | raise_stmt
# break_stmt -> 'break'
# continue_stmt -> 'continue'
# return_stmt -> 'return' [testlist]
# raise_stmt -> 'raise' test [',' test]
# import_stmt -> 'import' NAME (',' NAME)* | 'from' NAME 'import' ('*' | NAME (',' NAME)*)
# global_stmt -> 'global' NAME (',' NAME)*
# access_stmt -> 'access' ('*' | NAME (',' NAME)*) ':' accesstype (',' accesstype)*
# accesstype -> NAME+
# 
# exec_stmt -> 'exec' expr ['in' test [',' test]]
# 
#compound_stmt -> if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef
#if_stmt -> 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
# while_stmt -> 'while' test ':' suite ['else' ':' suite]
# for_stmt -> 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
# try_stmt -> 'try' ':' suite (except_clause ':' suite)+ | 'try' ':' suite 'finally' ':' suite
# 
# except_clause -> 'except' [test [',' test]]
#suite -> simple_stmt | NEWLINE INDENT stmt+ DEDENT
# 
##test -> and_test ('or' and_test)* | lambdef
#and_test -> not_test ('and' not_test)*
#not_test -> 'not' not_test | comparison
#comparison -> expr (comp_op expr)*
#comp_op -> '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' _ 'in'|'is'|'is' 'not'
#expr -> xor_expr ('|' xor_expr)*
#xor_expr -> and_expr ('^' and_expr)*
#and_expr -> shift_expr ('&' shift_expr)*
#shift_expr -> arith_expr (('<<'|'>>') arith_expr)*
#arith_expr -> term (('+'|'-') term)*
#term -> factor (('*'|'/'|'%') factor)*
#factor -> ('+'|'-'|'~') factor | atom trailer*
#atom -> '(' [testlist] ')' | '[' [testlist] ']' | '{' [dictmaker] '}' | '`' testlist '`' | NAME | NUMBER | STRING
atom ->  NAME# | NUMBER | STRING

#lambdef -> 'lambda' [varargslist] ':' test
#trailer -> '(' [testlist] ')' | '[' subscript ']' | '.' NAME
#subscript -> test | [test] ':' [test]
#exprlist -> expr (',' expr)* [',']
#testlist -> test (',' test)* [',']
#dictmaker -> test ':' test (',' test ':' test)* [',']
# 
# classdef -> 'class' NAME ['(' testlist ')'] ':' suite
#DEDENT -> 
NEWLINE -> [\n]
NUMBER -> %decimal  
STRING -> %dqstring 
NAME -> [a-zA-z]:+