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annotate tests/mpp/README @ 21:1c9dac05d040

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Add lint-style FALLTHROUGH annotations to fallthrough cases. (in the parse engine and thus the output code) Document this, because the old output causes warnings with gcc10.
author David A. Holland
date Mon, 13 Jun 2022 00:04:38 -0400
parents 13d2b8934445
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1 This test suite is a subset of one put together some years ago, as a
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2 regression suite for a different cpp.
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3
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4 It was never intended to test for standards conformance, although if
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5 you look around you'll find that the mpp example gets quite a lot of
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6 things wrong.
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7
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8 Some highlights:
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9
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10 badinc15.c - crashes
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11 badmac{03-06,17,18,20}.c - varargs macros not supported
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12 badmac07.c - allows multiple definition of macro arg names
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13 badmac08.c - allows arbitrary redefinitions of macros
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14 badmac{09,10-14}.c - allows undefining/redefining builtin macros
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15 badmac{15,16}.c - allows defining "defined"
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16 badmisc{1,2}.c - allows out-of-range line numbers
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17 broken01.c - passing empty macro args crashes
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18 broken02.c - doesn't allow macro expansions to span lines
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19 broken{03-04}.c - even simple recursive macros crash
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20 broken05.c - wrong number of macro args causes assertion
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21 broken06.c - nested token pasting crashes
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22 broken07.c - doesn't allow pasting to an empty token
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23 broken08.c - empty macro before directive causes strange error
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24 broken{09,10,11}.c - macros expanding to directive-like lines crash
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25 broken12.c - weird thing with #undef inside #if 0
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26 error1.c - apparently doesn't support #error
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27 evil01.c - crashes
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28 evil02.c - completely bogus error message
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29 includes.c - incorrect macro substitution in final #includes
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30 length{01-06}.c - crashes
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31 line.c - doesn't support line numbering?
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32
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33 misc.c
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34 - doesn't splice continuation lines correctly in some cases
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35 - doesn't handle // comments
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36 - doesn't understand digraph tokens
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37 - doesn't handle character constants in conditionals properly
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38 - after #undef ifndef, #ifdef ifndef gives wrong answer
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39 - doesn't handle nested expansion correctly
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40 - allows pasting punctuation tokens together