The declaration expect n specifies that there should be n shift/reduce errors in the grammar. If the actual grammar deviates from this number, a warning will be generated. The alternative form expect: _ suppresses all warnings. The syntax is:
Expect_Decl ::= expect: Integer ; expects n shift/reduce errors | expect: _ ; expects many shift/reduce errors
This declaration is optional. If omitted, warnings will be printed if parser conflicts are found during parser generation.