* src/reduce.c (reduce_grammar): When the language is empty,

[bison.git] / tests / reduce.at

diff --git a/tests/reduce.at b/tests/reduce.at
index 24911943aaa6c5f882e2ae8bccff195283cd92b5..4c8da723898cc719bab2105918899cc9250b34db 100644 (file)
--- a/tests/reduce.at
+++ b/tests/reduce.at
@@ -89,7 +89,16 @@ exp: useful;
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],

-[[input.y contains 9 useless nonterminals
+[[input.y: warning: 9 useless nonterminals
+input.y:4.8-15: warning: useless nonterminal: useless1
+input.y:5.8-15: warning: useless nonterminal: useless2
+input.y:6.8-15: warning: useless nonterminal: useless3
+input.y:7.8-15: warning: useless nonterminal: useless4
+input.y:8.8-15: warning: useless nonterminal: useless5
+input.y:9.8-15: warning: useless nonterminal: useless6
+input.y:10.8-15: warning: useless nonterminal: useless7
+input.y:11.8-15: warning: useless nonterminal: useless8
+input.y:12.8-15: warning: useless nonterminal: useless9

 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,


@@ -115,6 +124,8 @@ AT_CLEANUP
 
 AT_SETUP([Useless Rules])
 
 
 AT_SETUP([Useless Rules])
 

+AT_KEYWORDS([report])
+

 AT_DATA([[input.y]],
 [[%verbose
 %output="input.c"
 AT_DATA([[input.y]],
 [[%verbose
 %output="input.c"


@@ -133,7 +144,25 @@ useless9: '9';
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],

-[[input.y contains 9 useless nonterminals and 9 useless rules
+[[input.y: warning: 9 useless nonterminals and 9 useless rules
+input.y:6.1-8: warning: useless nonterminal: useless1
+input.y:7.1-8: warning: useless nonterminal: useless2
+input.y:8.1-8: warning: useless nonterminal: useless3
+input.y:9.1-8: warning: useless nonterminal: useless4
+input.y:10.1-8: warning: useless nonterminal: useless5
+input.y:11.1-8: warning: useless nonterminal: useless6
+input.y:12.1-8: warning: useless nonterminal: useless7
+input.y:13.1-8: warning: useless nonterminal: useless8
+input.y:14.1-8: warning: useless nonterminal: useless9
+input.y:6.9-13: warning: useless rule: useless1: '1'
+input.y:7.9-13: warning: useless rule: useless2: '2'
+input.y:8.9-13: warning: useless rule: useless3: '3'
+input.y:9.9-13: warning: useless rule: useless4: '4'
+input.y:10.9-13: warning: useless rule: useless5: '5'
+input.y:11.9-13: warning: useless rule: useless6: '6'
+input.y:12.9-13: warning: useless rule: useless7: '7'
+input.y:13.9-13: warning: useless rule: useless8: '8'
+input.y:14.9-13: warning: useless rule: useless9: '9'

 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,


@@ -157,16 +186,16 @@ Terminals which are not used:
    '7'
    '8'
    '9'
    '7'
    '8'
    '9'

-Useless rules:
-#2     useless1: '1';
-#3     useless2: '2';
-#4     useless3: '3';
-#5     useless4: '4';
-#6     useless5: '5';
-#7     useless6: '6';
-#8     useless7: '7';
-#9     useless8: '8';
-#10    useless9: '9';
+Useless rules
+    2 useless1: '1'
+    3 useless2: '2'
+    4 useless3: '3'
+    5 useless4: '4'
+    6 useless5: '5'
+    7 useless6: '6'
+    8 useless7: '7'
+    9 useless8: '8'
+   10 useless9: '9'

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP


@@ -182,6 +211,8 @@ AT_CLEANUP
 
 AT_SETUP([Reduced Automaton])
 
 
 AT_SETUP([Reduced Automaton])
 

+AT_KEYWORDS([report])
+

 # The non reduced grammar.
 # ------------------------
 AT_DATA([[not-reduced.y]],
 # The non reduced grammar.
 # ------------------------
 AT_DATA([[not-reduced.y]],


@@ -208,7 +239,12 @@ non_productive: non_productive useless_token
 ]])
 
 AT_CHECK([[bison not-reduced.y]], 0, [],
 ]])
 
 AT_CHECK([[bison not-reduced.y]], 0, [],

-[[not-reduced.y contains 2 useless nonterminals and 3 useless rules
+[[not-reduced.y: warning: 2 useless nonterminals and 3 useless rules
+not-reduced.y:14.1-13: warning: useless nonterminal: not_reachable
+not-reduced.y:11.6-19: warning: useless nonterminal: non_productive
+not-reduced.y:11.4-57: warning: useless rule: exp: non_productive
+not-reduced.y:14.14-56: warning: useless rule: not_reachable: useful
+not-reduced.y:17.15-18.63: warning: useless rule: non_productive: non_productive useless_token

 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' not-reduced.output]], 0,
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' not-reduced.output]], 0,


@@ -217,10 +253,10 @@ AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' not-reduced.output]], 0,
    non_productive
 Terminals which are not used:
    useless_token
    non_productive
 Terminals which are not used:
    useless_token

-Useless rules:
-#2     exp: non_productive;
-#3     not_reachable: useful;
-#4     non_productive: non_productive useless_token;
+Useless rules
+    2 exp: non_productive
+    3 not_reachable: useful
+    4 non_productive: non_productive useless_token

 ]])
 
 # The reduced grammar.
 ]])
 
 # The reduced grammar.


@@ -264,6 +300,8 @@ AT_CLEANUP
 
 AT_SETUP([Underivable Rules])
 
 
 AT_SETUP([Underivable Rules])
 

+AT_KEYWORDS([report])
+

 AT_DATA([[input.y]],
 [[%verbose
 %output="input.c"
 AT_DATA([[input.y]],
 [[%verbose
 %output="input.c"


@@ -275,17 +313,43 @@ indirection: underivable;
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],
 ]])
 
 AT_CHECK([[bison input.y]], 0, [],

-[[input.y contains 2 useless nonterminals and 3 useless rules
+[[input.y: warning: 2 useless nonterminals and 3 useless rules
+input.y:5.15-25: warning: useless nonterminal: underivable
+input.y:6.14-24: warning: useless nonterminal: indirection
+input.y:5.13-25: warning: useless rule: exp: underivable
+input.y:6.12-24: warning: useless rule: underivable: indirection
+input.y:7.12-24: warning: useless rule: indirection: underivable

 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
 [[Useless nonterminals:
    underivable
    indirection
 ]])
 
 AT_CHECK([[sed -n '/^Grammar/q;/^$/!p' input.output]], 0,
 [[Useless nonterminals:
    underivable
    indirection

-Useless rules:
-#2     exp: underivable;
-#3     underivable: indirection;
-#4     indirection: underivable;
+Useless rules
+    2 exp: underivable
+    3 underivable: indirection
+    4 indirection: underivable
+]])
+
+AT_CLEANUP
+
+
+
+## ---------------- ##
+## Empty Language.  ##
+## ---------------- ##
+
+AT_SETUP([Empty Language])
+
+AT_DATA([[input.y]],
+[[%output="input.c"
+%%
+exp: exp;
+]])
+
+AT_CHECK([[bison input.y]], 1, [],
+[[input.y: warning: 2 useless nonterminals and 2 useless rules
+input.y:3.1-3: fatal error: start symbol exp does not derive any sentence

 ]])
 
 AT_CLEANUP
 ]])
 
 AT_CLEANUP