PigletTranslator

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minijava.translate
Class PigletTranslator

java.lang.Object
  minijava.visitor.GJDepthFirst<PigletResult,PigletContext>
      minijava.translate.PigletTranslator

All Implemented Interfaces:: GJVisitor<PigletResult,PigletContext>

public final class PigletTranslator
extends GJDepthFirst<PigletResult,PigletContext>
extends GJDepthFirst<PigletResult,PigletContext>

Translates a MiniJava AST to a Piglet AST. The grammar for the Piglet language can be found here, and its specification here.

Author:: Santoso Wijaya

Constructor Summary
`PigletTranslator()` Creates a translator visitor.

Method Summary
`Goal`	`translate(Goal mj)` Visits a MiniJava AST, constructing a Piglet AST along the way, and then returns the root of the latter tree.
`PigletResult`	`visit(AllocationExpression n, PigletContext argu)` nodeToken -> "new" identifier -> Identifier() nodeToken1 -> "(" nodeToken2 -> ")"
`PigletResult`	`visit(AndExpression n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "&&" primaryExpression1 -> PrimaryExpression()
`PigletResult`	`visit(ArrayAllocationExpression n, PigletContext argu)` nodeToken -> "new" nodeToken1 -> "int" nodeToken2 -> "[" expression -> Expression() nodeToken3 -> "]"
`PigletResult`	`visit(ArrayAssignmentStatement n, PigletContext argu)` identifier -> Identifier() nodeToken -> "[" expression -> Expression() nodeToken1 -> "]" nodeToken2 -> "=" expression1 -> Expression() nodeToken3 -> ";"
`PigletResult`	`visit(ArrayLength n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "." nodeToken1 -> "length"
`PigletResult`	`visit(ArrayLookup n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "[" primaryExpression1 -> PrimaryExpression() nodeToken1 -> "]"
`PigletResult`	`visit(AssignmentStatement n, PigletContext argu)` identifier -> Identifier() nodeToken -> "=" expression -> Expression() nodeToken1 -> ";"
`PigletResult`	`visit(BracketExpression n, PigletContext argu)` nodeToken -> "(" expression -> Expression() nodeToken1 -> ")"
`PigletResult`	`visit(ClassDeclaration n, PigletContext argu)` nodeToken -> "class" identifier -> Identifier() nodeToken1 -> "{" nodeListOptional -> ( VarDeclaration() )* nodeListOptional1 -> ( MethodDeclaration() )* nodeToken2 -> "}"
`PigletResult`	`visit(ClassExtendsDeclaration n, PigletContext argu)` nodeToken -> "class" identifier -> Identifier() nodeToken1 -> "extends" identifier1 -> Identifier() nodeToken2 -> "{" nodeListOptional -> ( VarDeclaration() )* nodeListOptional1 -> ( MethodDeclaration() )* nodeToken3 -> "}"
`PigletResult`	`visit(CompareExpression n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "<" primaryExpression1 -> PrimaryExpression()
`PigletResult`	`visit(Expression n, PigletContext argu)` nodeChoice -> AndExpression() \| CompareExpression() \| PlusExpression() \| MinusExpression() \| TimesExpression() \| ArrayLookup() \| ArrayLength() \| MessageSend() \| PrimaryExpression()
`PigletResult`	`visit(FalseLiteral n, PigletContext argu)` nodeToken -> "false"
`PigletResult`	`visit(Identifier n, PigletContext argu)` nodeToken -> <IDENTIFIER>
`PigletResult`	`visit(IfStatement n, PigletContext argu)` nodeToken -> "if" nodeToken1 -> "(" expression -> Expression() nodeToken2 -> ")" statement -> Statement() nodeToken3 -> "else" statement1 -> Statement()
`PigletResult`	`visit(IntegerLiteral n, PigletContext argu)` nodeToken -> <INTEGER_LITERAL>
`PigletResult`	`visit(MainClass n, PigletContext argu)` nodeToken -> "class" identifier -> Identifier() nodeToken1 -> "{" nodeToken2 -> "public" nodeToken3 -> "static" nodeToken4 -> "void" nodeToken5 -> "main" nodeToken6 -> "(" nodeToken7 -> "String" nodeToken8 -> "[" nodeToken9 -> "]" identifier1 -> Identifier() nodeToken10 -> ")" nodeToken11 -> "{" nodeListOptional -> ( VarDeclaration() )* nodeListOptional1 -> ( Statement() )* nodeToken12 -> "}" nodeToken13 -> "}"
`PigletResult`	`visit(MessageSend n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "." identifier -> Identifier() nodeToken1 -> "(" nodeOptional -> ( ExpressionList() )? nodeToken2 -> ")"
`PigletResult`	`visit(MethodDeclaration n, PigletContext argu)` nodeToken -> "public" type -> Type() identifier -> Identifier() nodeToken1 -> "(" nodeOptional -> ( FormalParameterList() )? nodeToken2 -> ")" nodeToken3 -> "{" nodeListOptional -> ( VarDeclaration() )* nodeListOptional1 -> ( Statement() )* nodeToken4 -> "return" expression -> Expression() nodeToken5 -> ";" nodeToken6 -> "}"
`PigletResult`	`visit(MinusExpression n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "-" primaryExpression1 -> PrimaryExpression()
`PigletResult`	`visit(NotExpression n, PigletContext argu)` nodeToken -> "!" expression -> Expression()
`PigletResult`	`visit(PlusExpression n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "+" primaryExpression1 -> PrimaryExpression()
`PigletResult`	`visit(PrimaryExpression n, PigletContext argu)` nodeChoice -> IntegerLiteral() \| TrueLiteral() \| FalseLiteral() \| Identifier() \| ThisExpression() \| ArrayAllocationExpression() \| AllocationExpression() \| NotExpression() \| BracketExpression()
`PigletResult`	`visit(PrintStatement n, PigletContext argu)` nodeToken -> "System.out.println" nodeToken1 -> "(" expression -> Expression() nodeToken2 -> ")" nodeToken3 -> ";"
`PigletResult`	`visit(ThisExpression n, PigletContext argu)` nodeToken -> "this"
`PigletResult`	`visit(TimesExpression n, PigletContext argu)` primaryExpression -> PrimaryExpression() nodeToken -> "*" primaryExpression1 -> PrimaryExpression()
`PigletResult`	`visit(TrueLiteral n, PigletContext argu)` nodeToken -> "true"
`PigletResult`	`visit(WhileStatement n, PigletContext argu)` nodeToken -> "while" nodeToken1 -> "(" expression -> Expression() nodeToken2 -> ")" statement -> Statement()

Methods inherited from class minijava.visitor.GJDepthFirst
`visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

PigletTranslator

public PigletTranslator()

Creates a translator visitor. Call translate(minijava.syntaxtree.Goal) to produce a Piglet AST from a given MiniJava AST.

Method Detail

translate

public Goal translate(Goal mj)

Visits a MiniJava AST, constructing a Piglet AST along the way, and then returns the root of the latter tree.

Parameters:: mj - the root of the MiniJava AST to be translated
Returns:: the root of the translated Piglet AST
Throws:: minijava.type.TypeException - when the given MiniJava AST contains a type error