Add support for reserved-words-mappings to cpprest (#6501)

* Also handles automatic escaping for reserved words, i.e.
  by default, no need to provide a mapping.
Fix #6498

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractCppCodegen.java

@@ -101,6 +101,10 @@ abstract public class AbstractCppCodegen extends DefaultCodegen implements Codeg
             return sanitizeName(name);
         }
 
+        if (isReservedWord(name)) {
+            return escapeReservedWord(name);
+        }
+
         if (name.length() > 1) {
             return sanitizeName(Character.toUpperCase(name.charAt(0)) + name.substring(1));
         }
@@ -108,6 +112,21 @@ abstract public class AbstractCppCodegen extends DefaultCodegen implements Codeg
         return sanitizeName(name);
     }
 
+    /**
+     * Escapes a reserved word as defined in the `reservedWords` array. Handle
+     * escaping those terms here. This logic is only called if a variable
+     * matches the reseved words
+     *
+     * @return the escaped term
+     */
+    @Override
+    public String escapeReservedWord(String name) {
+        if(this.reservedWordsMappings().containsKey(name)) {
+            return this.reservedWordsMappings().get(name);
+        }
+        return sanitizeName("_" + name);
+    }
+
     @Override
     public String toParamName(String name) {
         return sanitizeName(super.toParamName(name));

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/CppRestClientCodegen.java

@@ -55,7 +55,7 @@ public class CppRestClientCodegen extends AbstractCppCodegen {
 
     /**
      * Configures the type of generator.
-     * 
+     *
      * @return the CodegenType for this generator
      * @see io.swagger.codegen.CodegenType
      */
@@ -66,7 +66,7 @@ public class CppRestClientCodegen extends AbstractCppCodegen {
     /**
      * Configures a friendly name for the generator. This will be used by the
      * generator to select the library with the -l flag.
-     * 
+     *
      * @return the friendly name for the generator
      */
     public String getName() {
@@ -76,7 +76,7 @@ public class CppRestClientCodegen extends AbstractCppCodegen {
     /**
      * Returns human-friendly help for the generator. Provide the consumer with
      * help tips, parameters here
-     * 
+     *
      * @return A string value for the help message
      */
     public String getHelp() {
@@ -111,8 +111,6 @@ public class CppRestClientCodegen extends AbstractCppCodegen {
                 "The default include statement that should be placed in all headers for including things like the declspec (convention: #include \"Commons.h\" ",
                 this.defaultInclude);
 
-        reservedWords = new HashSet<String>();
-
         supportingFiles.add(new SupportingFile("modelbase-header.mustache", "", "ModelBase.h"));
         supportingFiles.add(new SupportingFile("modelbase-source.mustache", "", "ModelBase.cpp"));
         supportingFiles.add(new SupportingFile("apiclient-header.mustache", "", "ApiClient.h"));
@@ -187,18 +185,6 @@ public class CppRestClientCodegen extends AbstractCppCodegen {
         additionalProperties.put("defaultInclude", defaultInclude);
     }
 
-    /**
-     * Escapes a reserved word as defined in the `reservedWords` array. Handle
-     * escaping those terms here. This logic is only called if a variable
-     * matches the reseved words
-     * 
-     * @return the escaped term
-     */
-    @Override
-    public String escapeReservedWord(String name) {
-        return "_" + name; // add an underscore to the name
-    }
-
     /**
      * Location to write model files. You can use the modelPackage() as defined
      * when the class is instantiated