Solve unused header warnings reported by clangd

src/libexpr/attr-set.hh

@@ -5,7 +5,6 @@
 #include "symbol-table.hh"
 
 #include <algorithm>
-#include <optional>
 
 namespace nix {
 

src/libexpr/eval-error.hh

@@ -1,7 +1,5 @@
 #pragma once
 
-#include <algorithm>
-
 #include "error.hh"
 #include "pos-idx.hh"
 

src/libexpr/eval-settings.hh

@@ -2,6 +2,7 @@
 ///@file
 
 #include "config.hh"
+#include "ref.hh"
 
 namespace nix {
 

src/libexpr/eval.cc

@@ -1,6 +1,6 @@
 #include "eval.hh"
+#include "eval-gc.hh"
 #include "eval-settings.hh"
-#include "hash.hh"
 #include "primops.hh"
 #include "print-options.hh"
 #include "exit.hh"
@@ -16,7 +16,6 @@
 #include "print.hh"
 #include "filtering-source-accessor.hh"
 #include "memory-source-accessor.hh"
-#include "signals.hh"
 #include "gc-small-vector.hh"
 #include "url.hh"
 #include "fetch-to-store.hh"
@@ -24,7 +23,6 @@
 #include "parser-tab.hh"
 
 #include <algorithm>
-#include <chrono>
 #include <iostream>
 #include <sstream>
 #include <cstring>

src/libexpr/eval.hh

@@ -3,21 +3,21 @@
 
 #include "attr-set.hh"
 #include "eval-error.hh"
-#include "eval-gc.hh"
 #include "types.hh"
 #include "value.hh"
 #include "nixexpr.hh"
 #include "symbol-table.hh"
 #include "config.hh"
 #include "experimental-features.hh"
+#include "position.hh"
+#include "pos-table.hh"
 #include "source-accessor.hh"
 #include "search-path.hh"
 #include "repl-exit-status.hh"
+#include "ref.hh"
 
 #include <map>
 #include <optional>
-#include <unordered_map>
-#include <mutex>
 #include <functional>
 
 namespace nix {

src/libexpr/nixexpr.cc

@@ -1,5 +1,4 @@
 #include "nixexpr.hh"
-#include "derivations.hh"
 #include "eval.hh"
 #include "symbol-table.hh"
 #include "util.hh"

src/libexpr/nixexpr.hh

@@ -6,11 +6,8 @@
 
 #include "value.hh"
 #include "symbol-table.hh"
-#include "error.hh"
-#include "position.hh"
 #include "eval-error.hh"
 #include "pos-idx.hh"
-#include "pos-table.hh"
 
 namespace nix {
 

src/libexpr/pos-table.hh

@@ -1,10 +1,8 @@
 #pragma once
 
-#include <cinttypes>
-#include <numeric>
+#include <cstdint>
 #include <vector>
 
-#include "chunked-vector.hh"
 #include "pos-idx.hh"
 #include "position.hh"
 #include "sync.hh"

src/libexpr/primops.cc

@@ -1,4 +1,3 @@
-#include "archive.hh"
 #include "derivations.hh"
 #include "downstream-placeholder.hh"
 #include "eval-inline.hh"

src/libexpr/value.hh

@@ -2,7 +2,6 @@
 ///@file
 
 #include <cassert>
-#include <climits>
 #include <span>
 
 #include "symbol-table.hh"