Migrate to zig 0.16

Review threads live on the whole diff, not on one commit, so none are shown here - a thread's line means something in the branch's final form, and painting it into an intermediate step would put it on code it is not about.

build.zigmodified+1-0

Changes to build.zig

		⋯38 linesShow the 38 lines above this hunk@@ -39,6 +39,7 @@ pub fn build(b: *std.Build) void {
39	39	// Later on we'll use this module as the root module of a test executable
40	40	// which requires us to specify a target.
41	41	.target = target,
	42	+ .link_libc = true,
42	43	});
43	44
44	45	// Here we define an executable. An executable needs to have a root module

src/profiling.zigmodified+4-4

Changes to src/profiling.zig

		⋯191 linesShow the 191 lines above this hunk@@ -192,13 +192,13 @@ test "profiler basic operations" {
192	192	const io = std.testing.io;
193	193	var profiler = Profiler.init(allocator, io, true);
194	194
195		- profiler.startCompilation();
	195	+ profiler.startCompilation(io);
196	196	// Do some work (just loop to consume time)
197	197	var i: usize = 0;
198	198	while (i < 1000) : (i += 1) {
199	199	_ = i * i;
200	200	}
201		- profiler.endCompilation();
	201	+ profiler.endCompilation(io);
202	202
203	203	profiler.recordStateCreation(5);
204	204	profiler.recordBacktrack();
		⋯11 linesShow the 11 lines above this hunk@@ -216,8 +216,8 @@ test "scoped timer" {
216	216	var profiler = Profiler.init(allocator, io, true);
217	217
218	218	{
219		- var timer = ScopedTimer.init(&profiler, .match);
220		- defer timer.deinit();
	219	+ var timer = ScopedTimer.init(&profiler, io, .match);
	220	+ defer timer.deinit(io);
221	221	// Do some work
222	222	var i: usize = 0;
223	223	while (i < 1000) : (i += 1) {

tests/thread_safety.zigmodified+4-3

Changes to tests/thread_safety.zig

		⋯190 linesShow the 190 lines above this hunk@@ -191,7 +191,8 @@ test "RegexCache basic operations" {
191	191
192	192	test "thread-safe allocator with concurrent matching" {
193	193	// Use thread-safe allocator for concurrent access
194		- var gpa = std.heap.GeneralPurposeAllocator(.{ .thread_safe = true }){};
	194	+ var gpa = std.heap.DebugAllocator(.{ .thread_safe = true }){};
	195	+ // TODO: can use this for leak detection
195	196	defer _ = gpa.deinit();
196	197	const allocator = gpa.allocator();
197	198
		⋯24 linesShow the 24 lines above this hunk@@ -222,7 +223,7 @@ test "thread-safe allocator with concurrent matching" {
222	223	}
223	224
224	225	test "concurrent matching different patterns" {
225		- var gpa = std.heap.GeneralPurposeAllocator(.{ .thread_safe = true }){};
	226	+ var gpa = std.heap.DebugAllocator(.{ .thread_safe = true }){};
226	227	defer _ = gpa.deinit();
227	228	const allocator = gpa.allocator();
228	229
		⋯43 linesShow the 43 lines above this hunk@@ -272,7 +273,7 @@ test "concurrent matching different patterns" {
272	273	}
273	274
274	275	test "stress test: many threads many matches" {
275		- var gpa = std.heap.GeneralPurposeAllocator(.{ .thread_safe = true }){};
	276	+ var gpa = std.heap.DebugAllocator(.{ .thread_safe = true }){};
276	277	defer _ = gpa.deinit();
277	278	const allocator = gpa.allocator();
278	279