grammar: record used associativity and print useless ones

Record which symbol associativity is used, and display useless ones.

* src/symtab.h, src/symtab.c (register_assoc, print_assoc_warnings): New
* src/symtab.c (init_assoc, is_assoc_used): New
* src/main.c: Use print_assoc_warnings
* src/conflicts.c: Use register_assoc
* tests/conflicts.at (Useless associativity warning): New.

Due to the new warning, many tests had to be updated.

* tests/conflicts.at tests/existing.at tests/regression.at:
Add the associativity warning in the expected results.
* tests/java.at: Fix the java calculator's grammar to remove a useless
associativity.
* doc/bison.texi (mfcalc example): Fix associativity to remove
warning.

1 files changed, 133 insertions, 4 deletions

diff --git a/tests/existing.at b/tests/existing.at
index 0209c35a..6118e7dc 100644
--- a/tests/existing.at
+++ b/tests/existing.at
@@ -427,8 +427,44 @@ dnl don't like even `print $!4;'.
 
 dnl BISON-STDERR
 [AT_COND_CASE([[canonical LR]],
-[[input.y: warning: 265 shift/reduce conflicts [-Wconflicts-sr]]],
-[[input.y: warning: 65 shift/reduce conflicts [-Wconflicts-sr]]])[
+[[input.y: warning: 265 shift/reduce conflicts [-Wconflicts-sr]
+input.y:19.8-16: warning: useless associativity for FUNC_CALL [-Wother]
+input.y:21.8-14: warning: useless associativity for YNUMBER [-Wother]
+input.y:21.16-22: warning: useless associativity for YSTRING [-Wother]
+input.y:22.14-22: warning: useless associativity for APPEND_OP [-Wother]
+input.y:23.8-15: warning: useless associativity for ASSIGNOP [-Wother]
+input.y:23.33-41: warning: useless associativity for CONCAT_OP [-Wother]
+input.y:27.8-18: warning: useless associativity for LEX_GETLINE [-Wother]
+input.y:28.8-13: warning: useless associativity for LEX_IN [-Wother]
+input.y:29.23-31: warning: useless associativity for INCREMENT [-Wother]
+input.y:29.33-41: warning: useless associativity for DECREMENT [-Wother]
+input.y:30.8-18: warning: useless associativity for LEX_BUILTIN [-Wother]
+input.y:30.20-29: warning: useless associativity for LEX_LENGTH [-Wother]
+input.y:40.11-13: warning: useless associativity for ',' [-Wother]
+input.y:47.8-10: warning: useless associativity for '!' [-Wother]
+input.y:47.12-16: warning: useless associativity for UNARY [-Wother]
+input.y:50.7-9: warning: useless associativity for '$' [-Wother]
+input.y:51.7-9: warning: useless associativity for '(' [-Wother]
+input.y:51.11-13: warning: useless associativity for ')' [-Wother]]],
+[[input.y: warning: 65 shift/reduce conflicts [-Wconflicts-sr]
+input.y:19.8-16: warning: useless associativity for FUNC_CALL [-Wother]
+input.y:21.8-14: warning: useless associativity for YNUMBER [-Wother]
+input.y:21.16-22: warning: useless associativity for YSTRING [-Wother]
+input.y:22.14-22: warning: useless associativity for APPEND_OP [-Wother]
+input.y:23.8-15: warning: useless associativity for ASSIGNOP [-Wother]
+input.y:23.33-41: warning: useless associativity for CONCAT_OP [-Wother]
+input.y:27.8-18: warning: useless associativity for LEX_GETLINE [-Wother]
+input.y:28.8-13: warning: useless associativity for LEX_IN [-Wother]
+input.y:29.23-31: warning: useless associativity for INCREMENT [-Wother]
+input.y:29.33-41: warning: useless associativity for DECREMENT [-Wother]
+input.y:30.8-18: warning: useless associativity for LEX_BUILTIN [-Wother]
+input.y:30.20-29: warning: useless associativity for LEX_LENGTH [-Wother]
+input.y:40.11-13: warning: useless associativity for ',' [-Wother]
+input.y:47.8-10: warning: useless associativity for '!' [-Wother]
+input.y:47.12-16: warning: useless associativity for UNARY [-Wother]
+input.y:50.7-9: warning: useless associativity for '$' [-Wother]
+input.y:51.7-9: warning: useless associativity for '(' [-Wother]
+input.y:51.11-13: warning: useless associativity for ')' [-Wother]]])[
 ]],
 
 dnl LAST-STATE
@@ -1369,9 +1405,21 @@ dnl INPUT
 dnl BISON-STDERR
 [AT_COND_CASE([[canonical LR]],
 [[input.y: warning: 1876 shift/reduce conflicts [-Wconflicts-sr]
-input.y: warning: 144 reduce/reduce conflicts [-Wconflicts-rr]]],
+input.y: warning: 144 reduce/reduce conflicts [-Wconflicts-rr]
+input.y:32.9-12: warning: useless associativity for HQUA [-Wother]
+input.y:53.8-14: warning: useless associativity for HASSIGN [-Wother]
+input.y:54.9-15: warning: useless associativity for HORELSE [-Wother]
+input.y:55.9-16: warning: useless associativity for HANDTHEN [-Wother]
+input.y:61.9-12: warning: useless associativity for HNOT [-Wother]
+input.y:68.7-11: warning: useless associativity for UNEAR [-Wother]]],
 [[input.y: warning: 78 shift/reduce conflicts [-Wconflicts-sr]
-input.y: warning: 10 reduce/reduce conflicts [-Wconflicts-rr]]])[
+input.y: warning: 10 reduce/reduce conflicts [-Wconflicts-rr]
+input.y:32.9-12: warning: useless associativity for HQUA [-Wother]
+input.y:53.8-14: warning: useless associativity for HASSIGN [-Wother]
+input.y:54.9-15: warning: useless associativity for HORELSE [-Wother]
+input.y:55.9-16: warning: useless associativity for HANDTHEN [-Wother]
+input.y:61.9-12: warning: useless associativity for HNOT [-Wother]
+input.y:68.7-11: warning: useless associativity for UNEAR [-Wother]]])[
 ]],
 
 dnl LAST-STATE
@@ -1954,6 +2002,87 @@ dnl without being followed by "of".)
 
 dnl BISON-STDERR
 [[input.y:471.11-48: warning: rule useless in parser due to conflicts: path: ORDINAL LAST object_type relative_path [-Wother]
+input.y:19.8-12: warning: useless associativity for LABEL [-Wother]
+input.y:20.8-15: warning: useless associativity for VARIABLE [-Wother]
+input.y:21.8-13: warning: useless associativity for NUMBER [-Wother]
+input.y:22.8-11: warning: useless associativity for TEXT [-Wother]
+input.y:25.8-14: warning: useless associativity for ORDINAL [-Wother]
+input.y:30.8-11: warning: useless associativity for LAST [-Wother]
+input.y:31.8-9: warning: useless associativity for UP [-Wother]
+input.y:32.8-11: warning: useless associativity for DOWN [-Wother]
+input.y:35.8-10: warning: useless associativity for BOX [-Wother]
+input.y:36.8-13: warning: useless associativity for CIRCLE [-Wother]
+input.y:37.8-14: warning: useless associativity for ELLIPSE [-Wother]
+input.y:38.8-10: warning: useless associativity for ARC [-Wother]
+input.y:39.8-11: warning: useless associativity for LINE [-Wother]
+input.y:40.8-12: warning: useless associativity for ARROW [-Wother]
+input.y:42.8-13: warning: useless associativity for SPLINE [-Wother]
+input.y:43.8-13: warning: useless associativity for HEIGHT [-Wother]
+input.y:44.8-13: warning: useless associativity for RADIUS [-Wother]
+input.y:45.8-12: warning: useless associativity for WIDTH [-Wother]
+input.y:46.8-15: warning: useless associativity for DIAMETER [-Wother]
+input.y:47.8-11: warning: useless associativity for FROM [-Wother]
+input.y:48.8-9: warning: useless associativity for TO [-Wother]
+input.y:49.8-9: warning: useless associativity for AT [-Wother]
+input.y:53.8-12: warning: useless associativity for SOLID [-Wother]
+input.y:54.8-13: warning: useless associativity for DOTTED [-Wother]
+input.y:55.8-13: warning: useless associativity for DASHED [-Wother]
+input.y:56.8-11: warning: useless associativity for CHOP [-Wother]
+input.y:59.8-12: warning: useless associativity for LJUST [-Wother]
+input.y:60.8-12: warning: useless associativity for RJUST [-Wother]
+input.y:61.8-12: warning: useless associativity for ABOVE [-Wother]
+input.y:62.8-12: warning: useless associativity for BELOW [-Wother]
+input.y:63.8-9: warning: useless associativity for OF [-Wother]
+input.y:66.8-14: warning: useless associativity for BETWEEN [-Wother]
+input.y:67.8-10: warning: useless associativity for AND [-Wother]
+input.y:68.8-11: warning: useless associativity for HERE [-Wother]
+input.y:69.8-12: warning: useless associativity for DOT_N [-Wother]
+input.y:70.8-12: warning: useless associativity for DOT_E [-Wother]
+input.y:71.8-12: warning: useless associativity for DOT_W [-Wother]
+input.y:72.8-12: warning: useless associativity for DOT_S [-Wother]
+input.y:73.8-13: warning: useless associativity for DOT_NE [-Wother]
+input.y:74.8-13: warning: useless associativity for DOT_SE [-Wother]
+input.y:75.8-13: warning: useless associativity for DOT_NW [-Wother]
+input.y:76.8-13: warning: useless associativity for DOT_SW [-Wother]
+input.y:77.8-12: warning: useless associativity for DOT_C [-Wother]
+input.y:78.8-16: warning: useless associativity for DOT_START [-Wother]
+input.y:79.8-14: warning: useless associativity for DOT_END [-Wother]
+input.y:85.8-10: warning: useless associativity for SIN [-Wother]
+input.y:86.8-10: warning: useless associativity for COS [-Wother]
+input.y:87.8-12: warning: useless associativity for ATAN2 [-Wother]
+input.y:88.8-10: warning: useless associativity for LOG [-Wother]
+input.y:89.8-10: warning: useless associativity for EXP [-Wother]
+input.y:90.8-11: warning: useless associativity for SQRT [-Wother]
+input.y:91.8-12: warning: useless associativity for K_MAX [-Wother]
+input.y:92.8-12: warning: useless associativity for K_MIN [-Wother]
+input.y:93.8-10: warning: useless associativity for INT [-Wother]
+input.y:94.8-11: warning: useless associativity for RAND [-Wother]
+input.y:95.8-12: warning: useless associativity for SRAND [-Wother]
+input.y:98.8-10: warning: useless associativity for TOP [-Wother]
+input.y:99.8-13: warning: useless associativity for BOTTOM [-Wother]
+input.y:100.8-12: warning: useless associativity for UPPER [-Wother]
+input.y:101.8-12: warning: useless associativity for LOWER [-Wother]
+input.y:116.8-18: warning: useless associativity for LEFT_CORNER [-Wother]
+input.y:117.8-19: warning: useless associativity for RIGHT_CORNER [-Wother]
+input.y:118.8-12: warning: useless associativity for NORTH [-Wother]
+input.y:119.8-12: warning: useless associativity for SOUTH [-Wother]
+input.y:120.8-11: warning: useless associativity for EAST [-Wother]
+input.y:121.8-11: warning: useless associativity for WEST [-Wother]
+input.y:122.8-13: warning: useless associativity for CENTER [-Wother]
+input.y:123.8-10: warning: useless associativity for END [-Wother]
+input.y:124.8-12: warning: useless associativity for START [-Wother]
+input.y:127.8-11: warning: useless associativity for PLOT [-Wother]
+input.y:128.8-16: warning: useless associativity for THICKNESS [-Wother]
+input.y:129.8-11: warning: useless associativity for FILL [-Wother]
+input.y:130.8-14: warning: useless associativity for COLORED [-Wother]
+input.y:131.8-15: warning: useless associativity for OUTLINED [-Wother]
+input.y:134.8-14: warning: useless associativity for SPRINTF [-Wother]
+input.y:137.7-9: warning: useless associativity for '.' [-Wother]
+input.y:156.23-25: warning: useless associativity for '(' [-Wother]
+input.y:157.20-22: warning: useless associativity for '`' [-Wother]
+input.y:159.48-50: warning: useless associativity for '@<:@' [-Wother]
+input.y:170.7-9: warning: useless associativity for ',' [-Wother]
+input.y:181.8-10: warning: useless associativity for '!' [-Wother]
 ]],
 
 dnl LAST-STATE