While assembly

Test/TestParser.hs

@@ -144,6 +144,21 @@ testExpressionPreIncrement = TestCase $
 testExpressionPreDecrement = TestCase $
     assertEqual "expect PreIncrement" (UnaryOperation PreDecrement (Reference "a")) $
     parseExpression [DECREMENT,IDENTIFIER "a"]
+testExpressionAssign = TestCase $
+    assertEqual "expect assign 5 to a" (StatementExpressionExpression (Assignment (Reference "a") (IntegerLiteral 5))) $
+    parseExpression [IDENTIFIER "a",ASSIGN,INTEGERLITERAL 5]
+testExpressionTimesEqual = TestCase $
+    assertEqual "expect assign and multiplication" (StatementExpressionExpression (Assignment (Reference "a") (BinaryOperation Multiplication (Reference "a") (IntegerLiteral 5)))) $
+    parseExpression [IDENTIFIER "a",TIMESEQUAL,INTEGERLITERAL 5]
+testExpressionDivideEqual = TestCase $
+    assertEqual "expect assign and division" (StatementExpressionExpression (Assignment (Reference "a") (BinaryOperation Division (Reference "a") (IntegerLiteral 5)))) $
+    parseExpression [IDENTIFIER "a",DIVEQUAL,INTEGERLITERAL 5]
+testExpressionPlusEqual = TestCase $
+    assertEqual "expect assign and addition" (StatementExpressionExpression (Assignment (Reference "a") (BinaryOperation Addition (Reference "a") (IntegerLiteral 5)))) $
+    parseExpression [IDENTIFIER "a",PLUSEQUAL,INTEGERLITERAL 5]
+testExpressionMinusEqual = TestCase $
+    assertEqual "expect assign and subtraction" (StatementExpressionExpression (Assignment (Reference "a") (BinaryOperation Subtraction (Reference "a") (IntegerLiteral 5)))) $
+    parseExpression [IDENTIFIER "a",MINUSEQUAL,INTEGERLITERAL 5]
 
 testStatementIfThen = TestCase $
     assertEqual "expect empty ifthen" [If (Reference "a") (Block [Block []]) Nothing] $
@@ -151,6 +166,10 @@ testStatementIfThen = TestCase $
 testStatementIfThenElse = TestCase $
     assertEqual "expect empty ifthen" [If (Reference "a") (Block [Block []]) (Just (Block [Block []]))] $
     parseStatement [IF,LBRACE,IDENTIFIER "a",RBRACE,LBRACKET,RBRACKET,ELSE,LBRACKET,RBRACKET]
+testStatementWhile = TestCase $
+    assertEqual "expect while" [While (Reference "a") (Block [Block []])] $
+    parseStatement [WHILE,LBRACE,IDENTIFIER "a",RBRACE,LBRACKET,RBRACKET]
+
 
 
 tests = TestList [
@@ -193,6 +212,13 @@ tests = TestList [
     testExpressionPostDecrement,
     testExpressionPreIncrement,
     testExpressionPreDecrement,
+    testExpressionAssign,
+    testExpressionTimesEqual,
+    testExpressionTimesEqual,
+    testExpressionDivideEqual,
+    testExpressionPlusEqual,
+    testExpressionMinusEqual,
     testStatementIfThen,
-    testStatementIfThenElse
+    testStatementIfThenElse,
+    testStatementWhile
     ]

src/ByteCode/ClassFile.hs

@@ -113,10 +113,10 @@ opcodeEncodingLength (Opinvokespecial _)    = 3
 opcodeEncodingLength (Opgoto _)             = 3
 opcodeEncodingLength (Opsipush _)           = 3
 opcodeEncodingLength (Opldc_w _)            = 3
-opcodeEncodingLength (Opaload _)            = 3
+opcodeEncodingLength (Opaload _)            = 4
-opcodeEncodingLength (Opiload _)            = 3
+opcodeEncodingLength (Opiload _)            = 4
-opcodeEncodingLength (Opastore _)           = 3
+opcodeEncodingLength (Opastore _)           = 4
-opcodeEncodingLength (Opistore _)           = 3
+opcodeEncodingLength (Opistore _)           = 4
 opcodeEncodingLength (Opputfield _)         = 3
 opcodeEncodingLength (Opgetfield _)         = 3
 

src/ByteCode/ClassFile/Generator.hs

@@ -262,6 +262,14 @@ assembleStatement (constants, ops, lvars) (TypedStatement _ (If expr if_stmt els
         else_length = sum (map opcodeEncodingLength ops_elsea) + 3
     in
         (constants_ifa, ops ++ ops_cmp ++ [Opsipush 0, Opif_icmpeq if_length] ++ ops_ifa ++ [Opgoto else_length] ++ ops_elsea, lvars)
+assembleStatement (constants, ops, lvars) (TypedStatement _ (While expr stmt)) = let
+        (constants_cmp, ops_cmp, _) = assembleExpression (constants, [], lvars) expr
+        (constants_stmta, ops_stmta, _) = assembleStatement (constants_cmp, [], lvars) stmt
+        -- +3 because we insert 2 gotos, one for the comparison, one for the goto back to the comparison
+        stmt_length = sum (map opcodeEncodingLength ops_stmta) + 6
+        entire_length = stmt_length + sum (map opcodeEncodingLength ops_cmp)
+    in
+        (constants_stmta, ops ++ ops_cmp ++ [Opsipush 0, Opif_icmpeq stmt_length] ++ ops_stmta ++ [Opgoto (-entire_length)], lvars)
 assembleStatement (constants, ops, lvars) (TypedStatement _ (LocalVariableDeclaration (VariableDeclaration dtype name expr))) = let
         isPrimitive = elem dtype ["char", "boolean", "int"]
         (constants_init, ops_init, _) = case expr of

src/Parser/JavaParser.y

@@ -82,7 +82,7 @@ compilationunit  : typedeclarations { $1 }
 typedeclarations : typedeclaration { [$1] }
                  | typedeclarations typedeclaration { $1 ++ [$2] }
 
-name             : simplename { $1 }
+name             : simplename { Reference $1 }
                 --  | qualifiedname { }
 
 typedeclaration  : classdeclaration { $1 }
@@ -122,7 +122,7 @@ classtype        : classorinterfacetype{ }
 classbodydeclaration : classmemberdeclaration { $1 }
                  | constructordeclaration { $1 }
 
-classorinterfacetype : name { $1 }
+classorinterfacetype : simplename { $1 }
 
 classmemberdeclaration : fielddeclaration { $1 }
                  | methoddeclaration { $1 }
@@ -203,7 +203,7 @@ localvariabledeclarationstatement : localvariabledeclaration  SEMICOLON  { $1 }
 statement        : statementwithouttrailingsubstatement{ $1 }  -- statement returns a list of statements
                  | ifthenstatement { [$1] }
                  | ifthenelsestatement { [$1] }
-                --  | whilestatement { }
+                 | whilestatement { [$1] }
                                      
 
 expression       : assignmentexpression { $1 }
@@ -222,10 +222,10 @@ ifthenstatement  : IF LBRACE expression  RBRACE  statement { If $3 (Block $5) No
 
 ifthenelsestatement : IF LBRACE expression  RBRACE statementnoshortif ELSE statement { If $3 (Block $5)  (Just (Block $7)) }
 
-whilestatement   : WHILE LBRACE expression  RBRACE  statement { }
+whilestatement   : WHILE LBRACE expression  RBRACE  statement { While $3 (Block $5) }
 
 assignmentexpression : conditionalexpression { $1 }
-                --  | assignment { }
+                 | assignment { StatementExpressionExpression $1 }
 
 emptystatement         :  SEMICOLON  { Block [] }
 
@@ -241,7 +241,11 @@ statementnoshortif : statementwithouttrailingsubstatement { $1 }
 conditionalexpression : conditionalorexpression { $1 }
                 --  | conditionalorexpression QUESMARK expression  COLON  conditionalexpression { }
 
-assignment       : lefthandside assignmentoperator assignmentexpression { }
+assignment       : lefthandside assignmentoperator assignmentexpression {
+                        case $2 of
+                        Nothing -> Assignment $1 $3
+                        Just operator -> Assignment $1 (BinaryOperation operator $1 $3)
+                        }
         
 
 statementexpression : assignment { }
@@ -262,18 +266,18 @@ conditionalorexpression : conditionalandexpression { $1 }
 
 lefthandside     : name { $1 }
 
-assignmentoperator : ASSIGN{ }
+assignmentoperator : ASSIGN { Nothing }
-                --  | TIMESEQUAL { }
+                 | TIMESEQUAL { Just Multiplication }
-                --  | DIVIDEEQUAL { }
+                 | DIVIDEEQUAL { Just Division }
-                --  | MODULOEQUAL { }
+                 | MODULOEQUAL { Just Modulo }
-                --  | PLUSEQUAL { }
+                 | PLUSEQUAL { Just Addition }
-                --  | MINUSEQUAL { }
+                 | MINUSEQUAL { Just Subtraction }
                 --  | SHIFTLEFTEQUAL { }
                 --  | SIGNEDSHIFTRIGHTEQUAL { }
                 --  | UNSIGNEDSHIFTRIGHTEQUAL { }
-                --  | ANDEQUAL { }
+                 | ANDEQUAL { Just BitwiseAnd }
-                --  | XOREQUAL { }
+                 | XOREQUAL { Just BitwiseXor }
-                --  | OREQUAL{ }
+                 | OREQUAL{ Just BitwiseOr }
 
 preincrementexpression : INCREMENT unaryexpression { UnaryOperation PreIncrement $2 }
 
@@ -302,7 +306,7 @@ unaryexpression         : unaryexpressionnotplusminus { $1 }
                  | preincrementexpression { $1 }
 
 postfixexpression : primary { $1 }
-                 | name { Reference $1 }
+                 | name { $1 }
                  | postincrementexpression { $1 }
                  | postdecrementexpression{ $1 }