For patterns with a trailing minus sign ( negative suffix ) truncation occurs at the point of a nondigit character excluding embedded minus signs .

u5bf9u4e8eu5e26u540eu7f6eu8d1fu53f7uff08u8d1f u540eu7f00uff09u7684u6a21u5f0fuff0c u622au65adu53d1u751fu5728u975eu6570u5b57u5b57u7b26u70b9uff08u4e0du5305u62ecu5185u5d4cu7684u8d1fu53f7uff09u3002