Fix compiler warning about "old style cast"

example/calc.cc

@@ -46,8 +46,8 @@ int main(int argc, const char** argv)
 
     parser["EXPRESSION"]      = reduce;
     parser["TERM"]            = reduce;
-    parser["TERM_OPERATOR"]   = [](const SemanticValues& sv) { return (char)*sv.c_str(); };
-    parser["FACTOR_OPERATOR"] = [](const SemanticValues& sv) { return (char)*sv.c_str(); };
+    parser["TERM_OPERATOR"]   = [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
+    parser["FACTOR_OPERATOR"] = [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
     parser["NUMBER"]          = [](const SemanticValues& sv) { return atol(sv.c_str()); };
 
     auto expr = argv[1];

example/calc2.cc

@@ -49,8 +49,8 @@ int main(int argc, const char** argv)
     EXPRESSION      <= seq(TERM, zom(seq(TERM_OPERATOR, TERM))),         reduce;
     TERM            <= seq(FACTOR, zom(seq(FACTOR_OPERATOR, FACTOR))),   reduce;
     FACTOR          <= cho(NUMBER, seq(chr('('), EXPRESSION, chr(')')));
-    TERM_OPERATOR   <= cls("+-"),                                        [](const SemanticValues& sv) { return (char)*sv.c_str(); };
-    FACTOR_OPERATOR <= cls("*/"),                                        [](const SemanticValues& sv) { return (char)*sv.c_str(); };
+    TERM_OPERATOR   <= cls("+-"),                                        [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
+    FACTOR_OPERATOR <= cls("*/"),                                        [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
     NUMBER          <= oom(cls("0-9")),                                  [](const SemanticValues& sv) { return atol(sv.c_str()); };
 
     auto expr = argv[1];

lint/httplib.h

@@ -245,7 +245,7 @@ socket_t create_socket(const char* host, int port, Fn fn)
 
        // Make 'reuse address' option available
        int yes = 1;
-       setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes));
+       setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char*>(&yes), sizeof(yes));
 
        // bind or connect
        if (fn(sock, *rp)) {

peglib.h

@@ -348,7 +348,7 @@ public:
     Action& operator=(const Action& rhs) = default;
 
     operator bool() const {
-        return (bool)fn_;
+        return bool(fn_);
     }
 
     any operator()(const SemanticValues& sv, any& dt) const {
@@ -1518,7 +1518,7 @@ inline void DefinitionReference::accept(Visitor& v) { v.visit(*this); }
 inline void Whitespace::accept(Visitor& v) { v.visit(*this); }
 
 inline void AssignIDToDefinition::visit(Holder& ope) {
-    auto p = (void*)ope.outer_;
+    auto p = static_cast<void*>(ope.outer_);
     if (ids.count(p)) {
         return;
     }

test/test.cc

@@ -551,8 +551,8 @@ TEST_CASE("Calculator test3", "[general]")
     // Setup actions
     parser["EXPRESSION"]      = reduce;
     parser["TERM"]            = reduce;
-    parser["TERM_OPERATOR"]   = [](const SemanticValues& sv) { return (char)*sv.c_str(); };
-    parser["FACTOR_OPERATOR"] = [](const SemanticValues& sv) { return (char)*sv.c_str(); };
+    parser["TERM_OPERATOR"]   = [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
+    parser["FACTOR_OPERATOR"] = [](const SemanticValues& sv) { return static_cast<char>(*sv.c_str()); };
     parser["NUMBER"]          = [](const SemanticValues& sv) { return stol(sv.str(), nullptr, 10); };
 
     // Parse