MakeIntPass returns a Pass with a state that starts at 0 and increments by 1 each Advance.

Reduce executes the test case reduction algorithm.

RunTest executes reducer commands.

Walk walks path for datadriven files and calls RunTest on them.

ModeInteresting instructs Reduce to use the interestingness as the progress indicator.

ModeSize instructs Reduce to use filesize as the progress indicator.

OK indicates there are more transforms in the current Pass.

STOP indicates there are no more transforms.

Pass defines a reduce pass.

State is opaque state for a Pass.

File contains the contents of a file.

InterestingFn returns true if File triggers the target test failure.

Mode is an enum specifying how to determine if forward progress was made.

Result is returned by a Transform func.