stage2 大量优化代码使其自举编译时间大幅缩短

stage2/utils/set.spl

@@ -3,7 +3,8 @@
 // 开放寻址集合。键按字节复制到集合自己的存储中；集合只释放自身存储，
 // 不释放键值内部引用的资源。哈希与相等回调的约定和 Map 一致。
 type .{ .Status } = @import("error.spl");
-type .{ .Map, .LookupResult } = @import("map.spl");
+type .{ .Map, .LookupResult, .hash_kind_usize, .hash_kind_view, .hash_kind_constant } =
+    @import("map.spl");
 type .{ .ByteView } = @import("byte_view.spl");
 type .{ .hash_usize, .eq_usize, .hash_view, .eq_view } = @import("hash.spl");
 
@@ -11,15 +12,14 @@ type Set = @self;
 
 map: Map,
 
-fn new(key_size: usize, key_align: usize,
-       hash_fn: fn(*u8): usize, eq_fn: fn(*u8, *u8): bool): Set {
+fn new(key_size: usize, key_align: usize, hash_kind: usize): Set {
     ret Set {
-        .map = Map.new(key_size, key_align, 1, 1, hash_fn, eq_fn),
+        .map = Map.new(key_size, key_align, 1, 1, hash_kind),
     };
 }
 
 fn valid(self: Set): bool {
-    ret Map.valid(self.map) && self.map.val_size == 1;
+    ret Map.valid(&self.map) && self.map.val_size == 1;
 }
 
 fn size(self: Set): usize {
@@ -104,7 +104,7 @@ fn constant_hash(key: *u8): usize {
 }
 
 fn test_insert_find_remove() {
-    var set = new(@sizeof(usize), @alignof(usize), hash_usize, eq_usize);
+    var set = new(@sizeof(usize), @alignof(usize), hash_kind_usize());
     defer { drop(&set); }
     @assert(valid(set));
     @assert(size(set) == 0 && capacity(set) == 0);
@@ -169,7 +169,7 @@ fn test_insert_find_remove() {
 }
 
 fn test_collisions_and_take() {
-    var set = new(@sizeof(usize), @alignof(usize), constant_hash, eq_usize);
+    var set = new(@sizeof(usize), @alignof(usize), hash_kind_constant());
     defer { drop(&set); }
 
     var i: usize = 0;
@@ -213,7 +213,7 @@ fn test_collisions_and_take() {
 }
 
 fn test_byte_view_keys() {
-    var set = new(@sizeof(ByteView), @alignof(ByteView), hash_view, eq_view);
+    var set = new(@sizeof(ByteView), @alignof(ByteView), hash_kind_view());
     defer { drop(&set); }
 
     var alpha = ByteView.from_slice("alpha");