mirror of https://github.com/evilhero/mylar
81 lines
3.1 KiB
Python
81 lines
3.1 KiB
Python
|
from pyparsing import *
|
||
|
|
IdentifierStart = oneOf(['$', '_']+list(alphas))
|
||
|
|
Identifier = Combine(IdentifierStart + Optional(Word(alphas+nums+'$_')))
|
||
|
|
|
||
|
|
_keywords = ['break', 'do', 'instanceof', 'typeof', 'case', 'else', 'new', 'var', 'catch', 'finally',
|
||
|
|
'return', 'void', 'continue', 'for', 'switch', 'while', 'debugger', 'function', 'this',
|
||
|
|
'with', 'default', 'if', 'throw', 'delete', 'in', 'try']
|
||
|
|
|
||
|
|
Keyword = oneOf(_keywords)
|
||
|
|
|
||
|
|
|
||
|
|
#Literals
|
||
|
|
|
||
|
|
#Bool
|
||
|
|
BooleanLiteral = oneOf(('true', 'false'))
|
||
|
|
|
||
|
|
#Null
|
||
|
|
|
||
|
|
NullLiteral = Literal('null')
|
||
|
|
|
||
|
|
#Undefined
|
||
|
|
|
||
|
|
UndefinedLiteral = Literal('undefined')
|
||
|
|
|
||
|
|
#NaN
|
||
|
|
|
||
|
|
NaNLiteral = Literal('NaN')
|
||
|
|
|
||
|
|
#Number
|
||
|
|
NonZeroDigit = oneOf(['1','2','3','4','5','6','7','8','9'])
|
||
|
|
DecimalDigit = oneOf(['0', '1','2','3','4','5','6','7','8','9'])
|
||
|
|
HexDigit = oneOf(list('0123456789abcdefABCDEF'))
|
||
|
|
DecimalDigits = Word(nums)
|
||
|
|
DecimalIntegerLiteral = Combine(NonZeroDigit+Optional(DecimalDigits)) | '0'
|
||
|
|
SignedInteger = Combine('-'+DecimalDigits) | Combine('+'+DecimalDigits) | DecimalDigits
|
||
|
|
ExponentPart = Combine(oneOf('e', 'E')+SignedInteger)
|
||
|
|
_DecimalLiteral = (Combine(DecimalIntegerLiteral('int')+'.'+Optional(DecimalDigits('float'))+Optional(ExponentPart('exp'))) |
|
||
|
|
Combine('.'+DecimalDigits('float')+Optional(ExponentPart('exp'))) |
|
||
|
|
DecimalIntegerLiteral('int')+Optional(ExponentPart('exp')))
|
||
|
|
DecimalLiteral = Combine(_DecimalLiteral+NotAny(IdentifierStart))
|
||
|
|
HexIntegerLiteral = Combine(oneOf(('0x','0X'))+Word('0123456789abcdefABCDEF')('hex'))
|
||
|
|
NumericLiteral = Group(DecimalLiteral)('decimal') ^ Group(HexIntegerLiteral)('hex')
|
||
|
|
|
||
|
|
def js_num(num):
|
||
|
|
res = NumericLiteral.parseString(num)
|
||
|
|
if res.decimal:
|
||
|
|
res = res.decimal
|
||
|
|
cand = int(res.int if res.int else 0)+ float('0.'+res.float if res.float else 0)
|
||
|
|
if res.exp:
|
||
|
|
cand*= 10**int(res.exp)
|
||
|
|
return cand
|
||
|
|
elif res.hex:
|
||
|
|
return int(res.hex.hex, 16)
|
||
|
|
|
||
|
|
#String
|
||
|
|
LineTerminator = White('\n', 1,1,1) | White('\r', 1,1,1)
|
||
|
|
LineTerminatorSequence = Combine(White('\r', 1,1,1)+White('\n', 1,1,1)) | White('\n', 1,1,1) | White('\r', 1,1,1)
|
||
|
|
LineContinuation = Combine('\\'+LineTerminatorSequence)
|
||
|
|
|
||
|
|
UnicodeEscapeSequence = Combine('u'+HexDigit+HexDigit+HexDigit+HexDigit)
|
||
|
|
HexEscapeSequence = Combine('x'+HexDigit+HexDigit)
|
||
|
|
SingleEscapeCharacter = oneOf(["'", '"', '\\', 'b', 'f', 'n', 'r', 't', 'v'])
|
||
|
|
EscapeCharacter = SingleEscapeCharacter | '0' | 'x' | 'u' # Changed DecimalDigit to 0 since it would match for example "\3" To verify..
|
||
|
|
NonEscapeCharacter = CharsNotIn([EscapeCharacter |LineTerminator])
|
||
|
|
CharacterEscapeSequence = SingleEscapeCharacter | NonEscapeCharacter
|
||
|
|
EscapeSequence = CharacterEscapeSequence | Combine('0'+NotAny(DecimalDigit)) | HexEscapeSequence | UnicodeEscapeSequence
|
||
|
|
|
||
|
|
SingleStringCharacter = CharsNotIn([LineTerminator | '\\' | "'"]) | Combine('\\'+EscapeSequence) | LineContinuation
|
||
|
|
DoubleStringCharacter = CharsNotIn([LineTerminator | '\\' | '"']) | Combine('\\'+EscapeSequence) | LineContinuation
|
||
|
|
StringLiteral = Combine('"'+ZeroOrMore(DoubleStringCharacter)+'"') ^ Combine("'"+ZeroOrMore(SingleStringCharacter)+"'")
|
||
|
|
|
||
|
|
#Array
|
||
|
|
|
||
|
|
|
||
|
|
#Dict
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|