Replace std::stoi with more descriptive wrapper

Exceptions from GCC's std::stoi are not very descriptive.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78710

Author: jwakely

src/issues.cpp

@@ -57,7 +57,7 @@ auto parse_date(std::istream & temp) -> std::chrono::year_month_day {
 auto report_date_file_last_modified(std::filesystem::path const & filename, lwg::metadata const& meta) -> std::chrono::year_month_day {
    using namespace std::chrono;
    system_clock::time_point t;
-   int id = std::stoi(filename.filename().stem().native().substr(5));
+   int id = lwg::stoi(filename.filename().stem().native().substr(5));
    // Use the Git commit date of the file if available.
    if (auto it = meta.git_commit_times.find(id); it !=  meta.git_commit_times.end())
       t = system_clock::from_time_t(it->second);
@@ -161,7 +161,7 @@ auto lwg::parse_issue_from_file(std::string tx, std::string const & filename,
    auto num = tx.substr(k, l-k);
    if (!filename.ends_with(std::format("issue{:0>4}.xml", num)))
      std::cerr << "warning: issue number " << num << " in " << filename << " does not match issue number\n";
-   is.num = std::stoi(num);
+   is.num = lwg::stoi(num);
 
    // Get issue status
    match = "status=\"";
@@ -270,7 +270,7 @@ auto lwg::parse_issue_from_file(std::string tx, std::string const & filename,
       if (l == std::string::npos) {
          throw bad_issue_file{filename, "Corrupt 'priority' element: no closing tag"};
       }
-      is.priority = std::stoi(tx.substr(k, l-k));
+      is.priority = lwg::stoi(tx.substr(k, l-k));
    }
 
    // Trim text to <discussion>

src/issues.h

@@ -48,6 +48,24 @@ auto parse_issue_from_file(std::string file_contents, std::string const & filena
   //
   // The filename is passed only to improve diagnostics.
 
+
+inline int stoi(const std::string& s)
+{
+    std::size_t idx = 0;
+    try
+    {
+        return std::stoi(s, &idx);
+    }
+    catch (const std::out_of_range&)
+    {
+        throw std::out_of_range("std::stoi: out of range: \"" + s + '"');
+    }
+    catch (const std::invalid_argument&)
+    {
+        throw std::invalid_argument("std::stoi: invalid argument: \"" + s + '"');
+    }
+}
+
 } // close namespace lwg
 
 #endif // INCLUDE_LWG_ISSUES_H

src/lists.cpp

@@ -132,7 +132,7 @@ auto read_issues_from_toc(std::string const & s) -> std::vector<std::tuple<int,
       if (i == std::string::npos) {
          break;
       }
-      int num = std::stoi(extract_link_text("number"));
+      int num = lwg::stoi(extract_link_text("number"));
       i += 4;
       std::string status = extract_link_text("status");
       if (status == "(i)") {