public static bool TryGetExpectedTypeForBinaryOp(TexlBinding binding, TexlNode curNode, int cursorPos, out DType expectedType)
{
// If we are in a binary operation context, the expected type is relative to the binary operation.
if (curNode != null && curNode.Parent != null && curNode.Parent.Kind == NodeKind.BinaryOp)
{
BinaryOpNode binaryOpNode = curNode.Parent.CastBinaryOp();
DType coercedType;
TexlNode expectedNode = null;
if (cursorPos < binaryOpNode.Token.Span.Min)
{
// Cursor is before the binary operator. Expected type is equal to the type of right side.
expectedNode = binaryOpNode.Right;
}
else if (cursorPos > binaryOpNode.Token.Span.Lim)
{
// Cursor is after the binary operator. Expected type is equal to the type of left side.
expectedNode = binaryOpNode.Left;
}
if (expectedNode != null)
{
expectedType = binding.TryGetCoercedType(expectedNode, out coercedType) ? coercedType : binding.GetType(expectedNode);
return(true);
}
}
expectedType = DType.Error;
return(false);
}