zig

commit 5acf2a5068f762d69c406bc61309a9ab349aca72 (tree)
parent bf0afaa876391571f6072650bf450356b26c928d
Author: Alexandros Naskos <alex_naskos@hotmail.com>
Date:   Thu,  1 Oct 2020 23:59:00 +0300

Merge pull request #6419 from tadeokondrak/std.fmt.comptimePrint

std.fmt: add comptimePrint
Diffstat:
M
lib/std/fmt.zig
 | 
10
++++++++++

1 file changed, 10 insertions(+), 0 deletions(-)
diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
@@ -1181,6 +1181,16 @@ fn bufPrintIntToSlice(buf: []u8, value: anytype, base: u8, uppercase: bool, opti
     return buf[0..formatIntBuf(buf, value, base, uppercase, options)];
 }
 
+pub fn comptimePrint(comptime fmt: []const u8, args: anytype) *const [count(fmt, args)]u8 {
+    comptime var buf: [count(fmt, args)]u8 = undefined;
+    _ = bufPrint(&buf, fmt, args) catch |err| @compileError(err);
+    return &buf;
+}
+
+test "comptimePrint" {
+    std.testing.expectEqualSlices(u8, "100", comptime comptimePrint("{}", .{100}));
+}
+
 test "parse u64 digit too big" {
     _ = parseUnsigned(u64, "123a", 10) catch |err| {
         if (err == error.InvalidCharacter) return;