public static string ReinterpretCast(
CodeGenContext context,
IAstNode node,
VariableType srcType,
VariableType dstType)
{
if (node is AstOperand operand && operand.Type == OperandType.Constant)
{
if (NumberFormatter.TryFormat(operand.Value, dstType, out string formatted))
{
return(formatted);
}
}
string expr = InstGen.GetExpression(context, node);
return(ReinterpretCast(expr, node, srcType, dstType));
}
private static void PrintBlock(CodeGenContext context, AstBlock block)
{
AstBlockVisitor visitor = new AstBlockVisitor(block);
visitor.BlockEntered += (sender, e) =>
{
switch (e.Block.Type)
{
case AstBlockType.DoWhile:
context.AppendLine("do");
break;
case AstBlockType.Else:
context.AppendLine("else");
break;
case AstBlockType.ElseIf:
context.AppendLine($"else if ({GetCondExpr(context, e.Block.Condition)})");
break;
case AstBlockType.If:
context.AppendLine($"if ({GetCondExpr(context, e.Block.Condition)})");
break;
default: throw new InvalidOperationException($"Found unexpected block type \"{e.Block.Type}\".");
}
context.EnterScope();
};
visitor.BlockLeft += (sender, e) =>
{
context.LeaveScope();
if (e.Block.Type == AstBlockType.DoWhile)
{
context.AppendLine($"while ({GetCondExpr(context, e.Block.Condition)});");
}
};
foreach (IAstNode node in visitor.Visit())
{
if (node is AstOperation operation)
{
context.AppendLine(InstGen.GetExpression(context, operation) + ";");
}
else if (node is AstAssignment assignment)
{
VariableType srcType = OperandManager.GetNodeDestType(assignment.Source);
VariableType dstType = OperandManager.GetNodeDestType(assignment.Destination);
string dest;
if (assignment.Destination is AstOperand operand && operand.Type == OperandType.Attribute)
{
dest = OperandManager.GetOutAttributeName(operand, context.Config);
}
else
{
dest = InstGen.GetExpression(context, assignment.Destination);
}
string src = ReinterpretCast(context, assignment.Source, srcType, dstType);
context.AppendLine(dest + " = " + src + ";");
}
