Source
pub fn GenericWriter(
comptime Context: type,
comptime WriteError: type,
comptime writeFn: fn (context: Context, bytes: []const u8) WriteError!usize,
) type {
return struct {
context: Context,
const Self = @This();
pub const Error = WriteError;
pub inline fn write(self: Self, bytes: []const u8) Error!usize {
return writeFn(self.context, bytes);
}
pub inline fn writeAll(self: Self, bytes: []const u8) Error!void {
return @errorCast(self.any().writeAll(bytes));
}
pub inline fn print(self: Self, comptime format: []const u8, args: anytype) Error!void {
return @errorCast(self.any().print(format, args));
}
pub inline fn writeByte(self: Self, byte: u8) Error!void {
return @errorCast(self.any().writeByte(byte));
}
pub inline fn writeByteNTimes(self: Self, byte: u8, n: usize) Error!void {
return @errorCast(self.any().writeByteNTimes(byte, n));
}
pub inline fn writeBytesNTimes(self: Self, bytes: []const u8, n: usize) Error!void {
return @errorCast(self.any().writeBytesNTimes(bytes, n));
}
pub inline fn writeInt(self: Self, comptime T: type, value: T, endian: std.builtin.Endian) Error!void {
return @errorCast(self.any().writeInt(T, value, endian));
}
pub inline fn writeStruct(self: Self, value: anytype) Error!void {
return @errorCast(self.any().writeStruct(value));
}
pub inline fn writeStructEndian(self: Self, value: anytype, endian: std.builtin.Endian) Error!void {
return @errorCast(self.any().writeStructEndian(value, endian));
}
pub inline fn any(self: *const Self) AnyWriter {
return .{
.context = @ptrCast(&self.context),
.writeFn = typeErasedWriteFn,
};
}
fn typeErasedWriteFn(context: *const anyopaque, bytes: []const u8) anyerror!usize {
const ptr: *const Context = @alignCast(@ptrCast(context));
return writeFn(ptr.*, bytes);
}
};
}