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

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.

tests/conflicts.at

@@ -1758,6 +1758,14 @@ State 4
       Second example           resolved_conflict . 'a' 'a'
       Second derivation        start ::=[ resolved_conflict reported_conflicts ::=[ . 'a' ] 'a' ]
 
+    Shift/reduce conflict on token 'a':
+       10 reported_conflicts: . %empty
+        9 reported_conflicts: . 'a'
+      First example            resolved_conflict . 'a'
+      First derivation         start ::=[ resolved_conflict reported_conflicts ::=[ . ] 'a' ]
+      Second example           resolved_conflict . 'a' 'a'
+      Second derivation        start ::=[ resolved_conflict reported_conflicts ::=[ . 'a' ] 'a' ]
+
 
 
 State 5

tests/counterexample.at

@@ -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]
 ]])
 

tests/diagnostics.at

@@ -545,6 +545,12 @@ Shift/reduce conflict on token "else":
   Example              <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
   First derivation     <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot><cex-step> ]</cex-step></cex-1> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-0>
   Example              <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
+  Second derivation    <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"else"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-1><cex-step> ]</cex-step></cex-0>
+
+Shift/reduce conflict on token "+":
+  Example              <cex-0><cex-1><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-0>
+  First derivation     <cex-0><cex-step>exp ::=[ </cex-step><cex-1><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot><cex-step> ]</cex-step></cex-1> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-0>
+  Example              <cex-0><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf></cex-1></cex-0>
   Second derivation    <cex-0><cex-step>exp ::=[ </cex-step><cex-leaf>"if"</cex-leaf> <cex-leaf>exp</cex-leaf> <cex-leaf>"then"</cex-leaf><cex-1> <cex-step>exp ::=[ </cex-step><cex-leaf>exp</cex-leaf> <cex-dot>•</cex-dot> <cex-leaf>"+"</cex-leaf> <cex-leaf>exp</cex-leaf><cex-step> ]</cex-step></cex-1><cex-step> ]</cex-step></cex-0>
 
 Shift/reduce conflict on token "+":

tests/report.at

@@ -1190,6 +1190,16 @@ Shift/reduce conflict on token "⊕":
   First derivation     exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ]
   Second derivation    exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ]
 
+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 "+":
+  Example              exp "⊕" exp • "+" exp
+  First derivation     exp ::=[ exp ::=[ exp "⊕" exp • ] "+" exp ]
+  Second derivation    exp ::=[ exp "⊕" exp ::=[ exp • "+" exp ] ]
+
 input.y:6.3-13: warning: rule useless in parser due to conflicts [-Wother]
 ]])
 
@@ -1377,6 +1387,20 @@ State 8
       First derivation         exp ::=[ exp ::=[ exp "⊕" exp • ] "⊕" exp ]
       Second derivation        exp ::=[ exp "⊕" exp ::=[ exp • "⊕" exp ] ]
 
+    Shift/reduce conflict on token "+":
+        1 exp: exp "⊕" exp •
+        2 exp: exp • "+" exp
+      Example                  exp "⊕" exp • "+" exp
+      First derivation         exp ::=[ exp ::=[ exp "⊕" exp • ] "+" exp ]
+      Second derivation        exp ::=[ exp "⊕" exp ::=[ exp • "+" exp ] ]
+
+    Shift/reduce conflict on token "+":
+        1 exp: exp "⊕" exp •
+        3 exp: exp • "+" exp
+      Example                  exp "⊕" exp • "+" exp
+      First derivation         exp ::=[ exp ::=[ exp "⊕" exp • ] "+" exp ]
+      Second derivation        exp ::=[ exp "⊕" exp ::=[ exp • "+" exp ] ]
+
 ]])