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Add compileError message for StringHashMap in AutoHashMap

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Julius Putra Tanu Setiaji 2020-12-28 09:43:52 +08:00 committed by Andrew Kelley
parent 3fdffe85c0
commit 2b3b355a23
1 changed files with 11 additions and 0 deletions
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11
lib/std/hash_map.zig
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@ -17,6 +17,17 @@ const Allocator = mem.Allocator;
const Wyhash = std.hash.Wyhash;
pub fn getAutoHashFn(comptime K: type) (fn (K) u64) {
comptime {
assert(@hasDecl(std, "StringHashMap")); // detect when the following message needs updated
if (K == []const u8) {
@compileError("std.auto_hash.autoHash does not allow slices here (" ++
@typeName(K) ++
") because the intent is unclear. " ++
"Consider using std.StringHashMap for hashing the contents of []const u8. " ++
"Alternatively, consider using std.auto_hash.hash or providing your own hash function instead.");
}
}
return struct {
fn hash(key: K) u64 {
if (comptime trait.hasUniqueRepresentation(K)) {