public override string GenCode()
{
BlockNode bl1 = blockAfterIf as BlockNode;
BlockNode bl2 = blockAfterElse as BlockNode;
if (bl1 is null || bl2 is null)
{
Console.WriteLine($"line {linenumber} error: syntax error");
errors++;
return(null);
}
if (condition.CheckType() != Parser.Types.BooleanType)
{
Console.WriteLine($"line {linenumber} error: bad type of condition expresion");
errors++;
return(null);
}
condition.GenCode();
EmitCode($"brfalse {bl2.blockId}");
bl1.GenCode();
EmitCode($"br {bl1.blockId}_2");
bl2.GenCode();
EmitCode($"{bl1.blockId}_2: nop");
return(null);
}
public override string GenCode()
{
if (condition.CheckType() != Parser.Types.BooleanType)
{
Console.WriteLine($"line {linenumber} error: bad type of condition expresion");
errors++;
return(null);
}
condition.GenCode();
EmitCode($"brfalse {breakJump}");
block.GenCode();
EmitCode($"{continueJump}: nop");
condition.GenCode();
EmitCode($"brtrue {block.blockId}");
EmitCode($"{breakJump}: nop");
return(null);
}