public void SimpleExample2()
{
var Text = (
@"
{
x = 7 - 8 * 0 + 3;
}
");
Scanner scanner = new Scanner();
scanner.SetSource(Text, 0);
Parser parser = new Parser(scanner);
parser.Parse();
var parentFiller = new FillParentsVisitor();
parser.root.Visit(parentFiller);
var optimizer = new ConstantFoldingVisitor();
parser.root.Visit(optimizer);
var TACGenerator = new TACGenerationVisitor();
parser.root.Visit(TACGenerator);
var TAC = TACGenerator.TAC;
var expected = new List <string>()
{
"x = 10"
};
var actual = TAC.Instructions.Select(instruction => instruction.ToString().Trim());
CollectionAssert.AreEqual(expected, actual);
}
internal static AstData FoldConstants(AstData astData, SideeffectHelper helper)
{
var constantFoldingVisitor = new ConstantFoldingVisitor();
var operandSortingVisitor = new OperandSortingVisitor();
var newTree = astData.Tree.RootNode;
do
{
constantFoldingVisitor.OptimizationsWereMade = false;
newTree = operandSortingVisitor.Visit(newTree);
newTree = constantFoldingVisitor.Visit(newTree);
} while (constantFoldingVisitor.OptimizationsWereMade);
return(new AstData(astData.TokenStream, astData.Filename, newTree.OwningTree));
}
