CVS log for src/tests/usr.bin/xlint/lint1/msg_292.c

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Default branch: MAIN

Revision 1.4 / (download) - annotate - [select for diffs], Sun Feb 27 19:32:51 2022 UTC (11 months ago) by rillig
Branch: MAIN
CVS Tags: netbsd-10-base, netbsd-10, HEAD
Changes since 1.3: +4 -12 lines
Diff to previous 1.3 (colored)

lint: concatenate string literals from left to right

Previously, the string literals "1" "2" "3" "4" were concatenated in the
order "23", "234", "1234".  This influenced the location of the
diagnostics for traditional C (which doesn't know concatenation at all)
and for mixing regular strings and wide strings.

Now the diagnostics occur exactly where they are expected.  The first
string literal defines whether the whole string is regular or wide, and
any further string literals must match it.

In traditional C mode, there are more diagnostics than before, but that
doesn't hurt since they are still correct and nobody uses lint in
traditional C mode anyway.

Revision 1.3 / (download) - annotate - [select for diffs], Sun Feb 27 18:51:21 2022 UTC (11 months ago) by rillig
Branch: MAIN
Changes since 1.2: +35 -3 lines
Diff to previous 1.2 (colored)

tests/lint: demonstrate unexpected ordering of string concatenations

When lint concatenates the strings "1" "2" "3" "4", it first
concatenates "23", then "234" and finally "1234".

Revision 1.2 / (download) - annotate - [select for diffs], Sun Feb 21 09:07:58 2021 UTC (23 months, 1 week ago) by rillig
Branch: MAIN
CVS Tags: cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x
Changes since 1.1: +2 -2 lines
Diff to previous 1.1 (colored)

lint: force each test to declare the expected diagnostics

By listing the expected diagnostics directly at the code that triggers
the diagnostics, it is easier to cross-check whether the diagnostics
make sense.

No functional change to lint itself.

Revision 1.1 / (download) - annotate - [select for diffs], Sat Jan 2 10:22:44 2021 UTC (2 years ago) by rillig
Branch: MAIN

lint: add a test for each message produced by lint1

Having a test for each message ensures that upcoming refactorings don't
break the basic functionality.  Adding the tests will also discover
previously unknown bugs in lint.

The tests ensure that every lint message can actually be triggered, and
they demonstrate how to do so.  Having a separate file for each test
leaves enough space for documenting historical anecdotes, rationale or
edge cases, keeping them away from the source code.

The interesting details of this commit are in Makefile and
t_integration.sh.  All other files are just auto-generated.

When running the tests as part of ATF, they are packed together as a
single test case.  Conceptually, it would have been better to have each
test as a separate test case, but ATF quickly becomes very slow as soon
as a test program defines too many test cases, and 50 is already too
many.  The time complexity is O(n^2), not O(n) as one would expect.
It's the same problem as in tests/usr.bin/make, which has over 300 test
cases as well.

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