all: migrate code to new cast builtin syntax

Most of this migration was performed automatically with `zig fmt`. There
were a few exceptions which I had to manually fix:

* `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten
* `@truncate`'s fixup is incorrect for vectors
* Test cases are not formatted, and their error locations change

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/std/testing/failing_allocator.zig b/lib/std/testing/failing_allocator.zig
index 2cdb78cd1d..313af987ab 100644
--- a/lib/std/testing/failing_allocator.zig
+++ b/lib/std/testing/failing_allocator.zig
@@ -63,7 +63,7 @@ pub const FailingAllocator = struct {
         log2_ptr_align: u8,
         return_address: usize,
     ) ?[*]u8 {
-        const self = @ptrCast(*FailingAllocator, @alignCast(@alignOf(FailingAllocator), ctx));
+        const self: *FailingAllocator = @ptrCast(@alignCast(ctx));
         if (self.index == self.fail_index) {
             if (!self.has_induced_failure) {
                 @memset(&self.stack_addresses, 0);
@@ -91,7 +91,7 @@ pub const FailingAllocator = struct {
         new_len: usize,
         ra: usize,
     ) bool {
-        const self = @ptrCast(*FailingAllocator, @alignCast(@alignOf(FailingAllocator), ctx));
+        const self: *FailingAllocator = @ptrCast(@alignCast(ctx));
         if (!self.internal_allocator.rawResize(old_mem, log2_old_align, new_len, ra))
             return false;
         if (new_len < old_mem.len) {
@@ -108,7 +108,7 @@ pub const FailingAllocator = struct {
         log2_old_align: u8,
         ra: usize,
     ) void {
-        const self = @ptrCast(*FailingAllocator, @alignCast(@alignOf(FailingAllocator), ctx));
+        const self: *FailingAllocator = @ptrCast(@alignCast(ctx));
         self.internal_allocator.rawFree(old_mem, log2_old_align, ra);
         self.deallocations += 1;
         self.freed_bytes += old_mem.len;