On 4/21/18 1:46 PM, Dr.No wrote:
On Saturday, 21 April 2018 at 17:15:47 UTC, Jonathan M Davis wrote:
On Saturday, April 21, 2018 16:05:22 Dr.No via Digitalmars-d-learn wrote:
import std.meta : Filter;
enum isNotReservedSymbol(string name) = name != "none" && name !=
"lastToken";
enum string[] members = staticMembers!Token;
static foreach(member; Filter!(isNotReservedSymbol, members))
{{
This return the error:
Error: template instance `pred!(["none", "word", "n", "digits",
"name", /* my whole array here */ ]) does not match template
declaration isNotReservedSymbol(string name)
how should have isNotReservedSymbol be defined?
std.meta.Filter operates on an AliasSeq, not a dynamic array. If you
have an array, then you can just use std.algorithm.iteration.filter
with a normal lambda.
I've tried use normal filter - albeit i'm willing to do all that at
runtin, but I got f cannot be read at compile time.
static foreach(member; staticMembers!Token.filter!(f =>
isNotReservedSymbol!(member))
Filter probably should work on arrays readable at compile time. I bet it
just hasn't been updated since static foreach was introduced.
-Steve
