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U_CDECL_BEGIN typedef UBool U_CALLCONV URegexMatchCallback ( const void *  context,
int32_t  steps 

Function pointer for a regular expression matching callback function. When set, a callback function will be called periodically during matching operations. If the call back function returns FALSE, the matching operation will be terminated early.

Note: the callback function must not call other functions on this URegularExpression.

context context pointer. The callback function will be invoked with the context specified at the time that uregex_setMatchCallback() is called.
steps the accumulated processing time, in match steps, for this matching operation.
TRUE to continue the matching operation. FALSE to terminate the matching operation. ICU 4.0

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