Added include fixits for C warnings beginning with: implicitly declaring library function

src/source_clang.cpp

@@ -390,12 +390,13 @@ void Source::ClangViewParse::update_diagnostics() {
             diagnostic.fix_its.emplace_back(clangmm::Diagnostic::FixIt{"#include <" + *cpp_header + ">\n", file_path.string(), get_new_include_offsets()});
         }
       };
-      if(diagnostic.fix_its.empty() && diagnostic.severity >= clangmm::Diagnostic::Severity::Error) {
+      if(diagnostic.fix_its.empty() && diagnostic.severity >= clangmm::Diagnostic::Severity::Warning) {
         for(size_t c = 0; c < clang_tokens->size(); c++) {
           auto &token = (*clang_tokens)[c];
           auto &token_offsets = clang_tokens_offsets[c];
           if(static_cast<unsigned int>(line) == token_offsets.first.line - 1 && static_cast<unsigned int>(index) >= token_offsets.first.index - 1 && static_cast<unsigned int>(index) <= token_offsets.second.index - 1) {
-            if(starts_with(diagnostic.spelling, "implicit instantiation of undefined template")) {
+            if(diagnostic.severity >= clangmm::Diagnostic::Severity::Error &&
+               starts_with(diagnostic.spelling, "implicit instantiation of undefined template")) {
               size_t start = 44 + 2;
               if(start < diagnostic.spelling.size()) {
                 auto end = diagnostic.spelling.find('<', start);
@@ -417,7 +418,8 @@ void Source::ClangViewParse::update_diagnostics() {
                 }
               }
             }
-            if(is_token_char(*start) && token.get_kind() == clangmm::Token::Kind::Identifier &&
+            if(is_token_char(*start) && token.get_kind() == clangmm::Token::Kind::Identifier) {
+              if(diagnostic.severity >= clangmm::Diagnostic::Severity::Error &&
                  (starts_with(diagnostic.spelling, "unknown type name") ||
                   starts_with(diagnostic.spelling, "no type named") ||
                   starts_with(diagnostic.spelling, "no member named") ||
@@ -439,9 +441,12 @@ void Source::ClangViewParse::update_diagnostics() {
                           (*clang_tokens)[c - 2].get_spelling() == "std")
                     has_std = true;
                 }
-
                 add_include_fixit(has_std, is_cpp && has_using_namespace_std(c), token_string);
               }
+              else if(diagnostic.severity >= clangmm::Diagnostic::Severity::Warning && is_c &&
+                      starts_with(diagnostic.spelling, "implicitly declaring library function"))
+                add_include_fixit(false, false, get_token(start));
+            }
             break;
           }
         }