fn readStreamAlloc(gpa: Allocator, io: Io, file: Io.File, limit: Io.Limit) ![]u8
fn readStreamAlloc(gpa: Allocator, io: Io, file: Io.File, limit: Io.Limit) ![]u8 { var file_reader: Io.File.Reader = .initStreaming(file, io, &.{}); return file_reader.interface.allocRemaining(gpa, limit) catch |err| switch (err) { error.ReadFailed => return file_reader.err.?, else => |e| return e, }; }