From 8af59d1f98266bd70b3afb44d196bbd151cedf22 Mon Sep 17 00:00:00 2001
From: Travis Staloch <1562827+travisstaloch@users.noreply.github.com>
Date: Sat, 20 Apr 2024 23:14:39 -0700
Subject: ComptimeStringMap: return a regular struct and optimize

this patch renames ComptimeStringMap to StaticStringMap, makes it
accept only a single type parameter, and return a known struct type
instead of an anonymous struct.  initial motivation for these changes
was to reduce the 'very long type names' issue described here
https://github.com/ziglang/zig/pull/19682.

this breaks the previous API.  users will now need to write:
`const map = std.StaticStringMap(T).initComptime(kvs_list);`

* move `kvs_list` param from type param to an `initComptime()` param
* new public methods
  * `keys()`, `values()` helpers
  * `init(allocator)`, `deinit(allocator)` for runtime data
  * `getLongestPrefix(str)`, `getLongestPrefixIndex(str)` - i'm not sure
     these belong but have left in for now incase they are deemed useful
* performance notes:
  * i posted some benchmarking results here:
    https://github.com/travisstaloch/comptime-string-map-revised/issues/1
  * i noticed a speedup reducing the size of the struct from 48 to 32
    bytes and thus use u32s instead of usize for all length fields
  * i noticed speedup storing KVs as a struct of arrays
  * latest benchmark shows these wall_time improvements for
    debug/safe/small/fast builds: -6.6% / -10.2% / -19.1% / -8.9%. full
    output in link above.
---
 src/Compilation.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/Compilation.zig')

diff --git a/src/Compilation.zig b/src/Compilation.zig
index 7af3d7bfd1..3532a9d5b5 100644
--- a/src/Compilation.zig
+++ b/src/Compilation.zig
@@ -265,7 +265,7 @@ pub const CRTFile = struct {
 
 /// Supported languages for "zig clang -x <lang>".
 /// Loosely based on llvm-project/clang/include/clang/Driver/Types.def
-pub const LangToExt = std.ComptimeStringMap(FileExt, .{
+pub const LangToExt = std.StaticStringMap(FileExt).initComptime(.{
     .{ "c", .c },
     .{ "c-header", .h },
     .{ "c++", .cpp },
-- 
cgit v1.2.3