void ASTVisitor.Accept(NodeWhen value)
{
Accept(value);
}
internal void Accept(NodeWhen when)
{
var condition = when.condition;
when.pass.isResultRequired = when.isResultRequired;
when.pass.inTailPosition = when.inTailPosition;
when.fail.isResultRequired = when.isResultRequired;
when.fail.inTailPosition = when.inTailPosition;
// Disable scopes, we'll do them ourselves
if (when.pass is NodeBlock)
(when.pass as NodeBlock).createScope = false;
if (when.fail is NodeBlock)
(when.fail as NodeBlock).createScope = false;
builder.StartScope();
uint failLoc;
/*
if (condition is NodeInfix && (condition as NodeInfix).op == "==")
{
}
else if (condition is NodeInfix && (condition as NodeInfix).op == "!=")
{
}
else // */
{
condition.Visit(this);
failLoc = builder.OpJumpF(0);
}
when.pass.Visit(this);
uint passLoc = builder.OpJump(0);
builder.SetOpC(failLoc, builder.InsnCount);
when.fail.Visit(this);
builder.SetOpC(passLoc, builder.InsnCount);
builder.EndScope();
}
private Node ParseWhen(Node pass)
{
var when = new NodeWhen(Location);
when.pass = pass;
Advance(); // 'when'
if (!TokensRemain)
{
log.Error(when.location, "Expected expression for 'when' condition, but the end of the file was reached.");
return when;
}
when.condition = Expression();
Expect(EL, "Expected 'el' to complete when expression.");
if (!TokensRemain)
{
log.Error(when.location, "Expected expression for 'when' fail expression, but the end of the file was reached.");
return when;
}
when.fail = Expression();
return when;
}
