fix missing includes in various headers

src/libexpr/lexer-helpers.hh

@@ -1,5 +1,13 @@
 #pragma once
 
+#include <cstddef>
+
+// inluding the generated headers twice leads to errors
+#ifndef BISON_HEADER
+#include "lexer-tab.hh"
+#include "parser-tab.hh"
+#endif
+
 namespace nix::lexer::internal {
 
 void initLoc(YYLTYPE * loc);

src/libexpr/print-options.hh

@@ -5,6 +5,7 @@
  */
 
 #include <limits>
+#include <stddef.h>
 
 namespace nix {
 

src/libstore/path-regex.hh

@@ -1,6 +1,8 @@
 #pragma once
 ///@file
 
+#include <string_view>
+
 namespace nix {
 
 

src/libutil/callback.hh

@@ -1,6 +1,7 @@
 #pragma once
 ///@file
 
+#include <cassert>
 #include <future>
 #include <functional>
 

src/libutil/config-impl.hh

@@ -13,6 +13,7 @@
  */
 
 #include "config.hh"
+#include "args.hh"
 
 namespace nix {
 

src/libutil/regex-combinators.hh

@@ -2,6 +2,7 @@
 ///@file
 
 #include <string_view>
+#include <string>
 
 namespace nix::regex {
 

src/libutil/unix/signals-impl.hh

@@ -14,6 +14,7 @@
 #include "error.hh"
 #include "logging.hh"
 #include "ansicolor.hh"
+#include "signals.hh"
 
 #include <sys/types.h>
 #include <sys/stat.h>

src/nix/self-exe.hh

@@ -2,6 +2,8 @@
 ///@file
 
 #include <filesystem>
+#include <optional>
+#include <string_view>
 
 namespace nix {