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| author | Julius Putra Tanu Setiaji <indocomsoft@gmail.com> | 2020-12-28 09:43:52 +0800 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2021-01-07 23:51:53 -0800 |
| commit | 2b3b355a23bea47aacbdfd56b853abc83e2f3ed6 (patch) | |
| tree | c00b8458ae5cdf6071b50b6f8d6062cb2f1b1cba /lib/std | |
| parent | 3fdffe85c0e51d1ec27e6ab4367a6293c18ce44c (diff) | |
| download | zig-2b3b355a23bea47aacbdfd56b853abc83e2f3ed6.tar.gz zig-2b3b355a23bea47aacbdfd56b853abc83e2f3ed6.zip | |
Add compileError message for StringHashMap in AutoHashMap
Diffstat (limited to 'lib/std')
| -rw-r--r-- | lib/std/hash_map.zig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/std/hash_map.zig b/lib/std/hash_map.zig index 8e32d12c55..679575875d 100644 --- a/lib/std/hash_map.zig +++ b/lib/std/hash_map.zig @@ -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)) { |