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cex: display all the S/R conflicts, not just one per (state, rule)

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Before this commit, on

    %%
    exp
    : "if" exp "then" exp
    | "if" exp "then" exp "else" exp
    | exp "+" exp
    | "num"

we used to not display the third counterexample below:

    Shift/reduce conflict on token "+":
      Example              exp "+" exp . "+" exp
      First derivation     exp ::=[ exp ::=[ exp "+" exp . ] "+" exp ]
      Second derivation    exp ::=[ exp "+" exp ::=[ exp . "+" exp ] ]

    Shift/reduce conflict on token "else":
      Example              "if" exp "then" "if" exp "then" exp . "else" exp
      First derivation     exp ::=[ "if" exp "then" exp ::=[ "if" exp "then" exp . ] "else" exp ]
      Second derivation    exp ::=[ "if" exp "then" exp ::=[ "if" exp "then" exp . "else" exp ] ]

    Shift/reduce conflict on token "+":
      Example              "if" exp "then" exp . "+" exp
      First derivation     exp ::=[ exp ::=[ "if" exp "then" exp . ] "+" exp ]
      Second derivation    exp ::=[ "if" exp "then" exp ::=[ exp . "+" exp ] ]

    Shift/reduce conflict on token "+":
      Example              "if" exp "then" exp "else" exp . "+" exp
      First derivation     exp ::=[ exp ::=[ "if" exp "then" exp "else" exp . ] "+" exp ]
      Second derivation    exp ::=[ "if" exp "then" exp "else" exp ::=[ exp . "+" exp ] ]

* src/counterexample.c (counterexample_report_state): Don't stop of
the first conflicts.
* tests/conflicts.at, tests/counterexample.at, tests/diagnostics.at,
* tests/report.at: Adjust.
This commit is contained in:
Akim Demaille
2020-06-16 08:37:28 +02:00
parent 0f120354b6
commit b65bd16e45
6 changed files with 67 additions and 29 deletions
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10
tests/counterexample.at
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@@ -79,6 +79,11 @@ Shift/reduce conflict on token B:
First derivation s ::=[ a ::=[ A . ] bc ::=[ B C ] ]
Second derivation s ::=[ ac ::=[ A ac ::=[ b ::=[ . B ] ] C ] ]
Shift/reduce conflict on token B:
Example A A . B B C C
First derivation s ::=[ a ::=[ A a ::=[ A . ] ] bc ::=[ B bc ::=[ B C ] C ] ]
Second derivation s ::=[ ac ::=[ A ac ::=[ A ac ::=[ b ::=[ . b ::=[ B B ] ] ] C ] C ] ]
input.y:6.4: warning: rule useless in parser due to conflicts [-Wother]
]])
@@ -328,6 +333,11 @@ Shift/reduce conflict on token B:
First derivation s ::=[ n ::=[ N a ::=[ A . ] B ] C ]
Second derivation s ::=[ n ::=[ N b ::=[ A . B C ] ] ]
Shift/reduce conflict on token B:
Example N N A . B D C
First derivation s ::=[ n ::=[ N n ::=[ N a ::=[ A . ] B ] D ] C ]
Second derivation s ::=[ n ::=[ N n ::=[ N b ::=[ A . B D ] ] C ] ]
input.y:5.4: warning: rule useless in parser due to conflicts [-Wother]
]])