Field Detail

• protected final WriterController controller

  The controller coordinating all bytecode writers for the current class.

Constructor Detail

• public SwitchExpressionWriter(WriterController controller)

  Creates a switch-expression writer with the given controller.

  Parameters:

  controller - the writer controller

Method Detail

• protected static int enumConstantCount(ClassNode enumType)

• protected static String enumConstantName(Expression expression, ClassNode enumType)

• protected static Integer intConstant(Expression expression)

• protected static boolean isIntegralType(ClassNode type)

• protected static boolean isIntegralWrapper(ClassNode type)

• protected ClassNode prepareSelectorType(OperandStack operandStack)

  Returns the type to store the selector under. Dynamic compilation boxes so the subsequent isCase tests see a reference.

• protected ClassNode resolveResultType(SwitchExpression expression)

  Resolves the type left on the operand stack at the switch-expression join.

• protected static String stringConstant(Expression expression)

• protected void throwIncompatibleClassChangeError()

  Throws IncompatibleClassChangeError for an enum constant added after an exhaustive switch expression was compiled.

• protected void throwUnmatchedSelector(int selectorIndex, ClassNode selectorType)

  Throws IllegalStateException naming the unmatched selector.

• protected static ClassNode unwrapEnumType(ClassNode type)

• protected void writeDefaultOrThrow(SwitchExpression expression, int selectorIndex, ClassNode selectorType, boolean completeEnum)

  Emits the default arm, or an unmatched-selector throw.

  Parameters:

  completeEnum - true when a complete enum switch should throw IncompatibleClassChangeError instead of IllegalStateException

• protected void writeIsCaseComparison(CaseStatement caseStatement, int selectorIndex, ClassNode selectorType)

  Emits one isCase test. Shared with StatementWriter via BinaryExpressionHelper.writeIsCase.

• protected boolean writeOptimizedSwitch(SwitchExpression expression, int selectorIndex, ClassNode selectorType)

  Attempts a specialized dispatch (tableswitch / lookupswitch). The base writer has none; static compilation overrides this.

  Returns:

  true if specialized bytecode was emitted

• public void writeSwitchExpression(SwitchExpression expression)

  Generates bytecode for a switch expression. The result is left on the operand stack with the expression's resolved type.

  Parameters:

  expression - the switch expression to compile

• public void writeYield(YieldStatement statement)

  Generates bytecode for a yield statement: evaluate the operand, cast it to the enclosing switch-expression result type, apply intervening finally blocks, and jump to the expression join point.

  Parameters:

  statement - the yield statement to compile