Added a test for genCase on the C and C++ backends

backends/GenerateC.hs

@@ -89,6 +89,7 @@ data GenOps = GenOps {
     genAssign :: GenOps -> Meta -> [A.Variable] -> A.ExpressionList -> CGen (),
     genBytesIn :: GenOps -> A.Type -> Maybe A.Variable -> CGen (),
     genBytesIn' :: GenOps -> A.Type -> Maybe A.Variable -> CGen (Maybe Int),
+    -- | Generates a case statement over the given expression with the structured as the body.
     genCase :: GenOps -> Meta -> A.Expression -> A.Structured -> CGen (),
     genCheckedConversion :: GenOps -> Meta -> A.Type -> A.Type -> CGen () -> CGen (),
     genConversion :: GenOps -> Meta -> A.ConversionMode -> A.Type -> A.Expression -> CGen (),
@@ -1629,33 +1630,32 @@ cgenIf ops m s
 --{{{  case
 cgenCase :: GenOps -> Meta -> A.Expression -> A.Structured -> CGen ()
 cgenCase ops m e s
-    =  do tell ["switch ("]
+    =  do tell ["switch("]
           call genExpression ops e
-          tell [") {\n"]
+          tell ["){"]
           seenDefault <- genCaseBody (return ()) s
           when (not seenDefault) $
-            do tell ["default:\n"]
+            do tell ["default:"]
                call genStop ops m "no option matched in CASE process"
-          tell ["}\n"]
+          tell ["}"]
   where
     -- FIXME -- can this be made common with genInputCaseBody above?
     genCaseBody :: CGen () -> A.Structured -> CGen Bool
     genCaseBody coll (A.Spec _ spec s)
         = genCaseBody (call genSpec ops spec coll) s
     genCaseBody coll (A.OnlyO _ (A.Option _ es p))
-        =  do sequence_ [tell ["case "] >> call genExpression ops e >> tell [":\n"] | e <- es]
+        =  do sequence_ [tell ["case "] >> call genExpression ops e >> tell [":"] | e <- es]
-              tell ["{\n"]
+              tell ["{"]
               coll
               call genProcess ops p
-              tell ["break;\n"]
+              tell ["}break;"]
-              tell ["}\n"]
               return False
     genCaseBody coll (A.OnlyO _ (A.Else _ p))
-        =  do tell ["default:\n"]
+        =  do tell ["default:"]
-              tell ["{\n"]
+              tell ["{"]
               coll
               call genProcess ops p
-              tell ["}\n"]
+              tell ["}break;"]
               return True
     genCaseBody coll (A.Several _ ss)
         =  do seens <- mapM (genCaseBody coll) ss

backends/GenerateCTest.hs

@@ -58,6 +58,9 @@ dollar = tell ["$"]
 caret :: CGen ()
 caret = tell ["^"]
 
+hash :: CGen ()
+hash = tell ["#"]
+
 foo :: A.Name
 foo = simpleName "foo"
 
@@ -523,6 +526,28 @@ testAssign = TestList
    state t = defineName (simpleName "foo") $ simpleDefDecl "foo" t
    over ops = ops {genVariable = override1 at, genExpression = override1 dollar}
 
+testCase :: Test
+testCase = TestList
+ [
+  testBothSame "testCase 0" "switch($){default:^}" ((tcall3 genCase emptyMeta e (A.Several emptyMeta [])) . over)
+  ,testBothSame "testCase 1" "switch($){default:{@}break;}" ((tcall3 genCase emptyMeta e (A.OnlyO emptyMeta $ A.Else emptyMeta p)) . over)
+  ,testBothSame "testCase 2" "switch($){default:{#@}break;}" ((tcall3 genCase emptyMeta e (spec $ A.OnlyO emptyMeta $ A.Else emptyMeta p)) . over)
+  
+  ,testBothSame "testCase 10" "switch($){case $:{@}break;default:^}" ((tcall3 genCase emptyMeta e (A.OnlyO emptyMeta $ A.Option emptyMeta [intLiteral 0] p)) . over)
+
+  ,testBothSame "testCase 20" "switch($){case $:case $:{#@}break;default:{@}break;case $:{@}break;}" ((tcall3 genCase emptyMeta e $ A.Several emptyMeta
+      [spec $ A.OnlyO emptyMeta $ A.Option emptyMeta [e, e] p
+      ,A.OnlyO emptyMeta $ A.Else emptyMeta p
+      ,A.OnlyO emptyMeta $ A.Option emptyMeta [e] p]
+    ) . over)
+ ]
+  where
+    --The expression and process won't be used so we can use what we like:
+    e = A.True emptyMeta
+    p = A.Skip emptyMeta
+    spec = A.Spec emptyMeta undefined
+    over ops = ops {genExpression = override1 dollar, genProcess = override1 at, genStop = override2 caret, genSpec = override2 hash}
+
 ---Returns the list of tests:
 tests :: Test
 tests = TestList
@@ -531,6 +556,7 @@ tests = TestList
    ,testArraySizes
    ,testArraySubscript
    ,testAssign
+   ,testCase
    ,testDeclaration
    ,testDeclareInitFree
    ,testGenType