com.google.gwt.dev.jjs.impl

Class FixAssignmentsToUnboxOrCast

java.lang.Object

com.google.gwt.dev.jjs.ast.JVisitor

com.google.gwt.dev.jjs.ast.JModVisitor

com.google.gwt.dev.jjs.impl.FixAssignmentsToUnboxOrCast

public class FixAssignmentsToUnboxOrCast
extends JModVisitor

Most autoboxing is handled by GenerateJavaAST. The only cases it does not handle are ++, --, and compound assignment operations (+=, etc.) when applied to a boxed type. This class fixes such cases in two steps. First, an internal subclass of CompoundAssignmentNormalizer simplifies such expressions to a simple assignment expression. Second, this visitor replaces an assignment to an unboxing method (unbox(x) = unbox(x) + 1) with an assignment to the underlying box (x = box(unbox(x) + 1)).

Update: GenerateJavaAST can also leave invalid AST structures of the form (Foo) x = foo due to the way generics are handled. This can happen when assigning into a field of a generic type. We'll go ahead and resolve that case here as well.

Field Summary

Fields inherited from class com.google.gwt.dev.jjs.ast.JVisitor

LVALUE_CONTEXT, UNMODIFIABLE_CONTEXT

Method Summary

Modifier and Type	Method and Description
void	endVisit(JBinaryOperation x, Context ctx)
static void	exec(JProgram program)

Methods inherited from class com.google.gwt.dev.jjs.ast.JModVisitor

accept, accept, accept, acceptImmutable, acceptLvalue, acceptWithInsertRemove, acceptWithInsertRemoveImmutable, checkReplacement, didChange, getNumMods, madeChanges, traverse

Methods inherited from class com.google.gwt.dev.jjs.ast.JVisitor

accept, accept, accept, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, endVisit, translateException, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, 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

equals, finalize, getClass, hashCode, toString

Method Detail

exec

public static void exec(JProgram program)

endVisit

public void endVisit(JBinaryOperation x,
                     Context ctx)

Overrides:

endVisit in class JVisitor