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cex: make "rerun with '-Wcex'" a note instead of a warning

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Currently the suggestion to rerun is a -Wother warning:

    warning: 2 shift/reduce conflicts [-Wconflicts-sr]
    warning: rerun with option '-Wcounterexamples' to generate conflict counterexamples [-Wother]

Instead, let's attach it as a subnote of the diagnostic (in the
current case, -Wconflicts-sr):

    warning: 2 shift/reduce conflicts [-Wconflicts-sr]
    note: rerun with option '-Wcounterexamples' to generate conflict counterexamples

* src/conflicts.c (conflicts_print): Do that.
Adjust the test suite.
This commit is contained in:
Akim Demaille
2020-07-21 06:52:10 +02:00
parent 28769d608e
commit 6b78e50cef
7 changed files with 60 additions and 47 deletions
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2
tests/sets.at
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@@ -285,7 +285,7 @@ term: 'n'
AT_BISON_CHECK([[-fcaret input.y]], [], [],
[[input.y: warning: 5 reduce/reduce conflicts [-Wconflicts-rr]
input.y: warning: rerun with option '-Wcounterexamples' to generate conflict counterexamples [-Wother]
input.y: note: rerun with option '-Wcounterexamples' to generate conflict counterexamples
input.y:2.14-17: warning: rule useless in parser due to conflicts [-Wother]
2 | expr: term | term | term | term | term | term
| ^~~~