Type Function MultiWriter [src]

Alias for std.io.multi_writer.MultiWriter

Takes a tuple of streams, and constructs a new stream that writes to all of them

Prototype

pub fn MultiWriter(comptime Writers: type) type

Parameters

Writers: type

Source

  pub fn MultiWriter(comptime Writers: type) type {
    comptime var ErrSet = error{};
    inline for (@typeInfo(Writers).@"struct".fields) |field| {
        const StreamType = field.type;
        ErrSet = ErrSet || StreamType.Error;
    }

    return struct {
        const Self = @This();

        streams: Writers,

        pub const Error = ErrSet;
        pub const Writer = io.Writer(*Self, Error, write);

        pub fn writer(self: *Self) Writer {
            return .{ .context = self };
        }

        pub fn write(self: *Self, bytes: []const u8) Error!usize {
            inline for (self.streams) |stream|
                try stream.writeAll(bytes);
            return bytes.len;
        }
    };
}  