std.fmt: breaking API changes

added adapter to AnyWriter and GenericWriter to help bridge the gap
between old and new API

make std.testing.expectFmt work at compile-time

std.fmt no longer has a dependency on std.unicode. Formatted printing
was never properly unicode-aware. Now it no longer pretends to be.

Breakage/deprecations:
* std.fs.File.reader -> std.fs.File.deprecatedReader
* std.fs.File.writer -> std.fs.File.deprecatedWriter
* std.io.GenericReader -> std.io.Reader
* std.io.GenericWriter -> std.io.Writer
* std.io.AnyReader -> std.io.Reader
* std.io.AnyWriter -> std.io.Writer
* std.fmt.format -> std.fmt.deprecatedFormat
* std.fmt.fmtSliceEscapeLower -> std.ascii.hexEscape
* std.fmt.fmtSliceEscapeUpper -> std.ascii.hexEscape
* std.fmt.fmtSliceHexLower -> {x}
* std.fmt.fmtSliceHexUpper -> {X}
* std.fmt.fmtIntSizeDec -> {B}
* std.fmt.fmtIntSizeBin -> {Bi}
* std.fmt.fmtDuration -> {D}
* std.fmt.fmtDurationSigned -> {D}
* {} -> {f} when there is a format method
* format method signature
  - anytype -> *std.io.Writer
  - inferred error set -> error{WriteFailed}
  - options -> (deleted)
* std.fmt.Formatted
  - now takes context type explicitly
  - no fmt string

1 files changed, 7 insertions, 7 deletions

diff --git a/lib/std/process.zig b/lib/std/process.zig
index 072cbeefdb..58d16eef1d 100644
--- a/lib/std/process.zig
+++ b/lib/std/process.zig
@@ -1553,7 +1553,7 @@ pub fn posixGetUserInfo(name: []const u8) !UserInfo {
     const file = try std.fs.openFileAbsolute("/etc/passwd", .{});
     defer file.close();
 
-    const reader = file.reader();
+    const reader = file.deprecatedReader();
 
     const State = enum {
         Start,
@@ -1895,7 +1895,7 @@ pub fn createEnvironFromMap(
     var i: usize = 0;
 
     if (zig_progress_action == .add) {
-        envp_buf[i] = try std.fmt.allocPrintZ(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?});
+        envp_buf[i] = try std.fmt.allocPrintSentinel(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?}, 0);
         i += 1;
     }
 
@@ -1906,16 +1906,16 @@ pub fn createEnvironFromMap(
                 .add => unreachable,
                 .delete => continue,
                 .edit => {
-                    envp_buf[i] = try std.fmt.allocPrintZ(arena, "{s}={d}", .{
+                    envp_buf[i] = try std.fmt.allocPrintSentinel(arena, "{s}={d}", .{
                         pair.key_ptr.*, options.zig_progress_fd.?,
-                    });
+                    }, 0);
                     i += 1;
                     continue;
                 },
                 .nothing => {},
             };
 
-            envp_buf[i] = try std.fmt.allocPrintZ(arena, "{s}={s}", .{ pair.key_ptr.*, pair.value_ptr.* });
+            envp_buf[i] = try std.fmt.allocPrintSentinel(arena, "{s}={s}", .{ pair.key_ptr.*, pair.value_ptr.* }, 0);
             i += 1;
         }
     }
@@ -1965,7 +1965,7 @@ pub fn createEnvironFromExisting(
     var existing_index: usize = 0;
 
     if (zig_progress_action == .add) {
-        envp_buf[i] = try std.fmt.allocPrintZ(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?});
+        envp_buf[i] = try std.fmt.allocPrintSentinel(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?}, 0);
         i += 1;
     }
 
@@ -1974,7 +1974,7 @@ pub fn createEnvironFromExisting(
             .add => unreachable,
             .delete => continue,
             .edit => {
-                envp_buf[i] = try std.fmt.allocPrintZ(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?});
+                envp_buf[i] = try std.fmt.allocPrintSentinel(arena, "ZIG_PROGRESS={d}", .{options.zig_progress_fd.?}, 0);
                 i += 1;
                 continue;
             },