퍼키님의 홈피에서 파이슨 코드를 봤는데
요즘 내가 짤려는 코드랑 유사한 기능을 해서 공부중인데
이상한 문법(?)의 파이슨을 사용해서 결국 파이슨 grammar 를 봅니다.
요즘 내가 짤려는 코드랑 유사한 기능을 해서 공부중인데
이상한 문법(?)의 파이슨을 사용해서 결국 파이슨 grammar 를 봅니다.
name ::= lc_letter (lc_letter | "_")*
lc_letter ::= "a"..."z"
identifier ::=
(letter|"_") (letter | digit | "_")*
letter ::=
lowercase | uppercase
lowercase ::=
"a"..."z"
uppercase ::=
"A"..."Z"
digit ::=
"0"..."9"
stringliteral ::=
[stringprefix](shortstring | longstring)
stringprefix ::=
"r" | "u" | "ur" | "R" | "U" | "UR" | "Ur" | "uR"
shortstring ::=
"'" shortstringitem* "'"
| '"' shortstringitem* '"'
longstring ::=
"'''" longstringitem* "'''"
| '"""' longstringitem* '"""'
shortstringitem ::=
shortstringchar | escapeseq
longstringitem ::=
longstringchar | escapeseq
shortstringchar ::=
<any source character except "\" or newline or the quote>
longstringchar ::=
<any source character except "\">
escapeseq ::=
"\" <any ASCII character>
longinteger ::=
integer ("l" | "L")
integer ::=
decimalinteger | octinteger | hexinteger
decimalinteger ::=
nonzerodigit digit* | "0"
octinteger ::=
"0" octdigit+
hexinteger ::=
"0" ("x" | "X") hexdigit+
nonzerodigit ::=
"1"..."9"
octdigit ::=
"0"..."7"
hexdigit ::=
digit | "a"..."f" | "A"..."F"
floatnumber ::=
pointfloat | exponentfloat
pointfloat ::=
[intpart] fraction | intpart "."
exponentfloat ::=
(intpart | pointfloat)
exponent
intpart ::=
digit+
fraction ::=
"." digit+
exponent ::=
("e" | "E") ["+" | "-"] digit+
imagnumber ::= (floatnumber | intpart) ("j" | "J")
atom ::=
identifier | literal | enclosure
enclosure ::=
parenth_form | list_display
| generator_expression | dict_display
| string_conversion
literal ::=
stringliteral | integer | longinteger
| floatnumber | imagnumber
parenth_form ::=
"(" [expression_list] ")"
test ::=
or_test | lambda_form
testlist ::=
test ( "," test )* [ "," ]
list_display ::=
"[" [listmaker] "]"
listmaker ::=
expression ( list_for
| ( "," expression )* [","] )
list_iter ::=
list_for | list_if
list_for ::=
"for" expression_list "in" testlist
[list_iter]
list_if ::=
"if" test [list_iter]
generator_expression ::=
"(" test genexpr_for ")"
genexpr_for ::=
"for" expression_list "in" test
[genexpr_iter]
genexpr_iter ::=
genexpr_for | genexpr_if
genexpr_if ::=
"if" test [genexpr_iter]
dict_display ::=
"\{" [key_datum_list] "\}"
key_datum_list ::=
key_datum ("," key_datum)* [","]
key_datum ::=
expression ":" expression
string_conversion ::=
"`" expression_list "`"
primary ::=
atom | attributeref
| subscription | slicing | call
attributeref ::=
primary "." identifier
subscription ::=
primary "[" expression_list "]"
slicing ::=
simple_slicing | extended_slicing
simple_slicing ::=
primary "[" short_slice "]"
extended_slicing ::=
primary "[" slice_list "]"
slice_list ::=
slice_item ("," slice_item)* [","]
slice_item ::=
expression | proper_slice | ellipsis
proper_slice ::=
short_slice | long_slice
short_slice ::=
[lower_bound] ":" [upper_bound]
long_slice ::=
short_slice ":" [stride]
lower_bound ::=
expression
upper_bound ::=
expression
stride ::=
expression
ellipsis ::=
"..."
call ::=
primary "(" [argument_list [","]] ")"
primary "(" [argument_list [","] |
test genexpr_for ] ")"
argument_list ::=
positional_arguments ["," keyword_arguments]
["," "*" expression]
["," "**" expression]
| keyword_arguments ["," "*" expression]
["," "**" expression]
| "*" expression ["," "**" expression]
| "**" expression
positional_arguments ::=
expression ("," expression)*
keyword_arguments ::=
keyword_item ("," keyword_item)*
keyword_item ::=
identifier "=" expression
power ::=
primary ["**" u_expr]
u_expr ::=
power | "-" u_expr
| "+" u_expr | "\~" u_expr
m_expr ::=
u_expr | m_expr "*" u_expr
| m_expr "//" u_expr
| m_expr "/" u_expr
| m_expr "\%" u_expr
a_expr ::=
m_expr | a_expr "+" m_expr
| a_expr "-" m_expr
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shift_expr ::=
a_expr
| shift_expr ( "<<" | ">>" ) a_expr
and_expr ::=
shift_expr | and_expr "\;SPMamp;" shift_expr
xor_expr ::=
and_expr | xor_expr "\textasciicircum" and_expr
or_expr ::=
xor_expr | or_expr "|" xor_expr
comparison ::=
or_expr ( comp_operator or_expr )*
comp_operator ::=
"<" | ">" | "==" | ">=" | "<=" | "<>" | "!="
| "is" ["not"] | ["not"] "in"
expression ::=
or_test [if or_test else
test] | lambda_form
or_test ::=
and_test | or_test "or" and_test
and_test ::=
not_test | and_test "and" not_test
not_test ::=
comparison | "not" not_test
lambda_form ::=
"lambda" [parameter_list]: expression
expression_list ::=
expression ( "," expression )* [","]
simple_stmt ::= expression_stmt
| assert_stmt
| assignment_stmt
| augmented_assignment_stmt
| pass_stmt
| del_stmt
| print_stmt
| return_stmt
| yield_stmt
| raise_stmt
| break_stmt
| continue_stmt
| import_stmt
| global_stmt
| exec_stmt
expression_stmt ::=
expression_list
assert_stmt ::=
"assert" expression ["," expression]
assignment_stmt ::=
(target_list "=")+ expression_list
target_list ::=
target ("," target)* [","]
target ::=
identifier
| "(" target_list ")"
| "[" target_list "]"
| attributeref
| subscription
| slicing
augmented_assignment_stmt ::=
target augop expression_list
augop ::=
"+=" | "-=" | "*=" | "/=" | "\%=" | "**="
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| ">>=" | "<<=" | "\&=" | "\textasciicircum=" | "|="
pass_stmt ::=
"pass"
del_stmt ::=
"del" target_list
print_stmt ::=
"print" ( \optionalexpression ("," expression)* \optional","
| ">>" expression
\optional("," expression)+ \optional"," )
return_stmt ::=
"return" [expression_list]
yield_stmt ::=
"yield" expression_list
raise_stmt ::=
"raise" [expression ["," expression
["," expression]]]
break_stmt ::=
"break"
continue_stmt ::=
"continue"
import_stmt ::=
"import" module ["as" name]
( "," module ["as" name] )*
| "from" module "import" identifier
["as" name]
( "," identifier ["as" name] )*
| "from" module "import" "(" identifier
["as" name]
( "," identifier ["as" name] )* [","] ")"
| "from" module "import" "*"
module ::=
(identifier ".")* identifier
global_stmt ::=
"global" identifier ("," identifier)*
exec_stmt ::=
"exec" expression
["in" expression ["," expression]]
compound_stmt ::=
if_stmt
| while_stmt
| for_stmt
| try_stmt
| with_stmt
| funcdef
| classdef
suite ::=
stmt_list NEWLINE
| NEWLINE INDENT statement+ DEDENT
statement ::=
stmt_list NEWLINE | compound_stmt
stmt_list ::=
simple_stmt (";" simple_stmt)* [";"]
if_stmt ::=
"if" expression ":" suite
( "elif" expression ":" suite )*
["else" ":" suite]
while_stmt ::=
"while" expression ":" suite
["else" ":" suite]
for_stmt ::=
"for" target_list "in" expression_list
":" suite
["else" ":" suite]
try_stmt ::= try1_stmt | try2_stmt
try1_stmt ::=
"try" ":" suite
("except" [expression
["," target]] ":" suite)+
["else" ":" suite]
["finally" ":" suite]
try2_stmt ::=
"try" ":" suite
"finally" ":" suite
with_stmt ::=
"with" expression ["as" target] ":" suite
funcdef ::=
[decorators] "def" funcname "(" [parameter_list] ")"
":" suite
decorators ::=
decorator+
decorator ::=
"@" dotted_name ["(" [argument_list [","]] ")"] NEWLINE
dotted_name ::=
identifier ("." identifier)*
parameter_list ::=
(defparameter ",")*
(~~"*" identifier [, "**" identifier]
| "**" identifier
| defparameter [","] )
defparameter ::=
parameter ["=" expression]
sublist ::=
parameter ("," parameter)* [","]
parameter ::=
identifier | "(" sublist ")"
funcname ::=
identifier
classdef ::=
"class" classname [inheritance] ":"
suite
inheritance ::=
"(" [expression_list] ")"
classname ::=
identifier
file_input ::=
(NEWLINE | statement)*
interactive_input ::=
[stmt_list] NEWLINE | compound_stmt NEWLINE
eval_input ::=
expression_list NEWLINE*
input_input ::=
expression_list NEWLINE