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std.Io.Writer: support alignment for {t} specifier

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Marc Tiehuis 2025-07-20 13:57:31 +12:00 • committed by Andrew Kelley
parent e43617e686
commit 4780cc50cf
1 changed files with 10 additions and 2 deletions
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12
lib/std/Io/Writer.zig
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@ -1123,8 +1123,8 @@ pub fn printValue(
else => invalidFmtError(fmt, value),
},
't' => switch (@typeInfo(T)) {
.error_set => return w.writeAll(@errorName(value)),
.@"enum", .@"union" => return w.writeAll(@tagName(value)),
.error_set => return w.alignBufferOptions(@errorName(value), options),
.@"enum", .@"union" => return w.alignBufferOptions(@tagName(value), options),
else => invalidFmtError(fmt, value),
},
else => {},
@ -2134,6 +2134,14 @@ test "bytes.hex" {
try testing.expectFmt("lowercase: 000ebabe\n", "lowercase: {x}\n", .{bytes_with_zeros});
}
test "padding" {
const foo: enum { foo } = .foo;
try testing.expectFmt("tag: |foo |\n", "tag: |{t:<4}|\n", .{foo});
const bar: error{bar} = error.bar;
try testing.expectFmt("error: |bar |\n", "error: |{t:<4}|\n", .{bar});
}
test fixed {
{
var buf: [255]u8 = undefined;