private bool Visit(TaskStatement stmt)
{
AssertNotConstant(stmt);
if (stmt is PrintTaskStatement print)
{
Machine.Print(FormatString(print.Text, Locals));
}
else if (stmt is ShowTaskStatement show)
{
Machine.Print(Visit(show.Value).ToString());
}
else if (stmt is UpdateTaskStatement)
{
if (Machine is not IUpdatableMachine upd)
{
throw new InterpreterException("This machine cannot queue updates", stmt.Span);
}
upd.QueueUpdate();
}
else
{
throw new InterpreterException("Unknown task", stmt.Span);
}
return(false);
string FormatString(string str, IDictionary <string, BitsValue> locals)
{
return(Regex.Replace(str, @"\$([a-zA-Z_][a-zA-Z0-9_]*)(:(?<base>b|x))?", m =>
{
if (!locals.TryGetValue(m.Groups[1].Value, out var value))
{
throw new InterpreterException($"Local variable ${m.Value} not found in string interpolation", stmt.Span);
}
var nBase = m.Groups["base"].Success ? m.Groups["base"].Value : null;
return nBase == "x" ? value.ToStringHex()
: nBase == "b" ? value.ToStringBinary()
: value.ToString();
}));
}
}
private void Visit(TaskStatement stmt)
{
switch (stmt)
{
case ShowTaskStatement show:
LoadMachine();
Visit(show.Value);
IL.Box(typeof(BitsValue));
IL.Call(typeof(object).GetMethod(nameof(object.ToString)));
IL.Call(typeof(IMachine).GetMethod(nameof(IMachine.Print)));
break;
case PrintTaskStatement print:
LoadMachine();
IL.Ldstr(print.Text);
IL.Call(typeof(IMachine).GetMethod(nameof(IMachine.Print)));
break;
}
}
