doc-src/Tutorial/Misc/Defs.thy

- Inserted additional check for equality types in check_mode_clause that
avoids ill-typed code to be generated.
- Mode inference algorithm now outputs additional diagnostic messages.

Defs = Types +
consts nand, exor :: gate
defs nand_def "nand A B == ~(A & B)"
     exor_def "exor A B == A & ~B | ~A & B"
end