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std.fmt: breaking API changes

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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
This commit is contained in:
Andrew Kelley
2025-06-27 20:05:22 -07:00
parent 0b3f0124dc
commit 0e37ff0d59
161 changed files with 4385 additions and 5847 deletions
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4
test/link/elf.zig
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@@ -1316,7 +1316,7 @@ fn testGcSectionsZig(b: *Build, opts: Options) *Step {
\\extern fn live_fn2() void;
\\pub fn main() void {
\\ const stdout = std.io.getStdOut();
\\ stdout.writer().print("{d} {d}\n", .{ live_var1, live_var2 }) catch unreachable;
\\ stdout.deprecatedWriter().print("{d} {d}\n", .{ live_var1, live_var2 }) catch unreachable;
\\ live_fn2();
\\}
,
@@ -1358,7 +1358,7 @@ fn testGcSectionsZig(b: *Build, opts: Options) *Step {
\\extern fn live_fn2() void;
\\pub fn main() void {
\\ const stdout = std.io.getStdOut();
\\ stdout.writer().print("{d} {d}\n", .{ live_var1, live_var2 }) catch unreachable;
\\ stdout.deprecatedWriter().print("{d} {d}\n", .{ live_var1, live_var2 }) catch unreachable;
\\ live_fn2();
\\}
,