public object VisitStatementLoopStatement(StatementLoopStatement statementLoopStatement, object o)
{
var loopStartAddress = nextAdr;
Emit(Machine.JUMPop, 0, Machine.CBr, -1);
var stopTheLoopAddress = nextAdr;
Emit(Machine.JUMPop, 0, Machine.CBr, -1);
Patch(loopStartAddress, nextAdr);
var conditionEvaluationAddress = nextAdr;
statementLoopStatement.Condition.Visit(this);
var jumpIfAddress = nextAdr;
Emit(Machine.JUMPIFop, 0, Machine.CBr, -1);
statementLoopStatement.Statements.Visit(this, stopTheLoopAddress);
Emit(Machine.JUMPop, 0, Machine.CBr, conditionEvaluationAddress);
Patch(jumpIfAddress, nextAdr);
Patch(stopTheLoopAddress, nextAdr);
return(null);
}
public object VisitStatementLoopStatement(StatementLoopStatement statementLoopStatement, object o)
{
idTable.EnterNestedScopeLevel(isLoopScope: true);
var variableType = (VariableType.ValueTypeEnum)statementLoopStatement.Condition.Visit(this);
if (variableType != VariableType.ValueTypeEnum.BOOLY)
{
throw new Exception("Loop statement condition must evaluate to a booly value");
}
statementLoopStatement.Statements.Visit(this);
idTable.ExitNestedScopeLevel();
return(null);
}
