This test checks our implementation of the special RegExp member variables. Properties of RegExp at startup: $&: {} $': {} $+: {} $1: {} $2: {} $3: {} $4: {} $5: {} $6: {} $7: {} $8: {} $9: {} $_: {} $`: {} escape: {function escape() { [native code] }} input: {} lastMatch: {} lastParen: {} leftContext: {} length: {2} name: {RegExp} rightContext: {} Properties of RegExp after /(1)(2)(3)(4)(5)(6)(7)(8)(9)(0)/.exec(<1234567890>): $&: {1234567890} $': {>} $+: {0} $1: {1} $2: {2} $3: {3} $4: {4} $5: {5} $6: {6} $7: {7} $8: {8} $9: {9} $_: {<1234567890>} $`: {<} escape: {function escape() { [native code] }} input: {<1234567890>} lastMatch: {1234567890} lastParen: {0} leftContext: {<} length: {2} name: {RegExp} rightContext: {>} RegExp.$0 does not exist RegExp.$10 does not exist RegExp doesn't use RegExp.input RegExp.input coerces values to strings Properties of RegExp after /(1)(2)(3)(4)(5)(6)(7)(8)(9)(0)/.exec(XXX): $&: {1234567890} $': {>} $+: {0} $1: {1} $2: {2} $3: {3} $4: {4} $5: {5} $6: {6} $7: {7} $8: {8} $9: {9} $_: {0} $`: {<} escape: {function escape() { [native code] }} input: {0} lastMatch: {1234567890} lastParen: {0} leftContext: {<} length: {2} name: {RegExp} rightContext: {>} ---------- [Cleared RegExp values] ---------- Properties of RegExp after <1234567890>.search(/(1)(2)(3)(4)(5)(6)(7)(8)(9)(0)/): $&: {1234567890} $': {>} $+: {0} $1: {1} $2: {2} $3: {3} $4: {4} $5: {5} $6: {6} $7: {7} $8: {8} $9: {9} $_: {<1234567890>} $`: {<} escape: {function escape() { [native code] }} input: {<1234567890>} lastMatch: {1234567890} lastParen: {0} leftContext: {<} length: {2} name: {RegExp} rightContext: {>} ---------- [Cleared RegExp values] ---------- Properties of RegExp after <1234567890>.replace(/(1)(2)(3)(4)(5)(6)(7)(8)(9)(0)/): $&: {1234567890} $': {>} $+: {0} $1: {1} $2: {2} $3: {3} $4: {4} $5: {5} $6: {6} $7: {7} $8: {8} $9: {9} $_: {<1234567890>} $`: {<} escape: {function escape() { [native code] }} input: {<1234567890>} lastMatch: {1234567890} lastParen: {0} leftContext: {<} length: {2} name: {RegExp} rightContext: {>}