_Coroutine IntegerLiteral {
	char ch;							// character passed by cocaller
	// YOU ADD MEMBERS HERE
	void main();						// coroutine main
  public:
	enum { EOT = '\003' };				// end of text
	_Exception Match {					// last character match
	  public:
		uintmax_t value;				// value of integer literal
		Match( uintmax_t value ) : value( value ) {}
	};
	_Exception Error {};				// last character invalid
	void next( char c ) {
		ch = c;							// communication input
		resume();						// activate
	}
};

/*
Test data

123
0123
0x123
0b1011
123u
123L
123ul
123'456

0x
018
123uu
W
0b102
1234567890123456789012
123'346'
0x'ff
*/