mirror of
https://github.com/ziglang/zig.git
synced 2025-12-15 02:33:07 +00:00
0e37ff0d59
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
35 lines
1.1 KiB
Zig
35 lines
1.1 KiB
Zig
const builtin = @import("builtin");
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const std = @import("std");
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const expect = std.testing.expect;
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const mem = std.mem;
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const fmt = std.fmt;
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const ET = union(enum) {
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SINT: i32,
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UINT: u32,
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pub fn print(a: *const ET, buf: []u8) anyerror!usize {
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return switch (a.*) {
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ET.SINT => |x| fmt.printInt(buf, x, 10, .lower, fmt.FormatOptions{}),
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ET.UINT => |x| fmt.printInt(buf, x, 10, .lower, fmt.FormatOptions{}),
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};
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}
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};
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test "enum with members" {
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if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
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if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
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const a = ET{ .SINT = -42 };
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const b = ET{ .UINT = 42 };
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var buf: [20]u8 = undefined;
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try expect((a.print(buf[0..]) catch unreachable) == 3);
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try expect(mem.eql(u8, buf[0..3], "-42"));
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try expect((b.print(buf[0..]) catch unreachable) == 2);
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try expect(mem.eql(u8, buf[0..2], "42"));
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}
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