add uppercase/lowercase helpers

ibaned · ibaned · commit fac7267dc746 · 2023-01-05T14:16:29.000-07:00
diff --git a/src/parsegen_string.cpp b/src/parsegen_string.cpp
@@ -1,6 +1,7 @@
 #include "parsegen_string.hpp"
 
 #include <stdexcept>
+#include <cctype>
 
 namespace parsegen {
 
@@ -71,4 +72,22 @@ std::string unquote(std::string const& s)
   return unescape(s.substr(1, s.length() - 2));
 }
 
+std::string lowercase(std::string const& s) {
+  std::string result = s;
+  std::transform(result.begin(), result.end(), result.begin(),
+  [] (unsigned char c) {
+    return std::tolower(c);
+  });
+  return result;
+}
+
+std::string uppercase(std::string const& s) {
+  std::string result = s;
+  std::transform(result.begin(), result.end(), result.begin(),
+  [] (unsigned char c) {
+    return std::toupper(c);
+  });
+  return result;
+}
+
 }
diff --git a/src/parsegen_string.hpp b/src/parsegen_string.hpp
@@ -27,5 +27,7 @@ std::string unescape(std::string const& s);
 std::string double_quote(std::string const& s);
 std::string single_quote(std::string const& s);
 std::string unquote(std::string const& s);
+std::string lowercase(std::string const& s);
+std::string uppercase(std::string const& s);
 
 }  // namespace parsegen
