chore(3p/nix): unvendor tvix 0.1 r/4098

Nothing is using this now, and we'll likely never pick this up again,
but we learned a lot in the process.

Every now and then this breaks in some bizarre way on channel bumps
and it's just a waste of time to maintain that.

Change-Id: Idcf2f5acd4ca7070ce18d7149cbfc0d967dc0a44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5632
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 85 deletions

diff --git a/third_party/nix/src/libutil/istringstream_nocopy.hh b/third_party/nix/src/libutil/istringstream_nocopy.hh
deleted file mode 100644
index 31683d37c91b..000000000000
--- a/third_party/nix/src/libutil/istringstream_nocopy.hh
+++ /dev/null
@@ -1,85 +0,0 @@
-/* This file provides a variant of std::istringstream that doesn't
-   copy its string argument. This is useful for large strings. The
-   caller must ensure that the string object is not destroyed while
-   it's referenced by this object. */
-
-#pragma once
-
-#include <iostream>
-#include <string>
-
-template <class CharT, class Traits = std::char_traits<CharT>,
-          class Allocator = std::allocator<CharT>>
-class basic_istringbuf_nocopy : public std::basic_streambuf<CharT, Traits> {
- public:
-  using string_type = std::basic_string<CharT, Traits, Allocator>;
-
-  using off_type = typename std::basic_streambuf<CharT, Traits>::off_type;
-
-  using pos_type = typename std::basic_streambuf<CharT, Traits>::pos_type;
-
-  using int_type = typename std::basic_streambuf<CharT, Traits>::int_type;
-
-  using traits_type = typename std::basic_streambuf<CharT, Traits>::traits_type;
-
- private:
-  const string_type& s;
-
-  off_type off;
-
- public:
-  explicit basic_istringbuf_nocopy(const string_type& s) : s{s}, off{0} {}
-
- private:
-  pos_type seekoff(off_type off, std::ios_base::seekdir dir,
-                   std::ios_base::openmode which) {
-    if (which & std::ios_base::in) {
-      this->off =
-          dir == std::ios_base::beg
-              ? off
-              : (dir == std::ios_base::end ? s.size() + off : this->off + off);
-    }
-    return pos_type(this->off);
-  }
-
-  pos_type seekpos(pos_type pos, std::ios_base::openmode which) {
-    return seekoff(pos, std::ios_base::beg, which);
-  }
-
-  std::streamsize showmanyc() { return s.size() - off; }
-
-  int_type underflow() {
-    if (typename string_type::size_type(off) == s.size()) {
-      return traits_type::eof();
-    }
-    return traits_type::to_int_type(s[off]);
-  }
-
-  int_type uflow() {
-    if (typename string_type::size_type(off) == s.size()) {
-      return traits_type::eof();
-    }
-    return traits_type::to_int_type(s[off++]);
-  }
-
-  int_type pbackfail(int_type ch) {
-    if (off == 0 || (ch != traits_type::eof() && ch != s[off - 1])) {
-      return traits_type::eof();
-    }
-
-    return traits_type::to_int_type(s[--off]);
-  }
-};
-
-template <class CharT, class Traits = std::char_traits<CharT>,
-          class Allocator = std::allocator<CharT>>
-class basic_istringstream_nocopy : public std::basic_iostream<CharT, Traits> {
-  using buf_type = basic_istringbuf_nocopy<CharT, Traits, Allocator>;
-  buf_type buf;
-
- public:
-  explicit basic_istringstream_nocopy(const typename buf_type::string_type& s)
-      : std::basic_iostream<CharT, Traits>(&buf), buf(s){};
-};
-
-using istringstream_nocopy = basic_istringstream_nocopy<char>;