Add entries for cppgraphqlgen to the C/C++ section

src/content/code/language-support/c-c/client/cppgraphqlgen-clientgen.md

@@ -0,0 +1,34 @@
+---
+name: cppgraphqlgen-clientgen
+description: A C++20 GraphQL request client generator and response parser using the schema document. If you want to consume a GraphQL service from a C++ client, you can pre-compile queries and deserialization functions for the expected results.
+url: https://github.com/microsoft/cppgraphqlgen
+github: microsoft/cppgraphqlgen
+---
+
+The `clientgen` utility is based on `schemagen` and shares the same external dependencies. The command line arguments
+are almost the same, except it takes an extra file for the request document and there is no equivalent to `--stubs`:
+```
+Usage:  clientgen [options] <schema file> <request file> <output filename prefix> <output namespace>
+Command line options:
+  --version              Print the version number
+  -? [ --help ]          Print the command line options
+  -v [ --verbose ]       Verbose output including generated header names as
+                         well as sources
+  -s [ --schema ] arg    Schema definition file path
+  -r [ --request ] arg   Request document file path
+  -o [ --operation ] arg Operation name if the request document contains more
+                         than one
+  -p [ --prefix ] arg    Prefix to use for the generated C++ filenames
+  -n [ --namespace ] arg C++ sub-namespace for the generated types
+  --source-dir arg       Target path for the <prefix>Client.cpp source file
+  --header-dir arg       Target path for the <prefix>Client.h header file
+  --no-introspection     Do not expect support for Introspection
+```
+
+This utility should output one header and one source file for each request document. A request document may contain more
+than one operation, in which case it will output definitions for all of them together. You may limit the output to a
+single operation from the request document by specifying the `--operation` (or `-o`) argument with the operation name.
+
+The generated code depends on the `graphqlclient` library for serialization of built-in types. If you link the generated
+code, you'll also need to link `graphqlclient`, `graphqlpeg` for the pre-parsed, pre-validated request AST, and
+`graphqlresponse` for the `graphql::response::Value` implementation.

src/content/code/language-support/c-c/server/cppgraphqlgen-schemagen.md

@@ -0,0 +1,25 @@
+---
+name: cppgraphqlgen-schemagen
+description: A C++20 GraphQL service generator using the schema document. You can use this to implement a GraphQL service with resolvers backed by whatever C++ libraries you need.
+url: https://github.com/microsoft/cppgraphqlgen
+github: microsoft/cppgraphqlgen
+---
+
+Run `schemagen -?` to get a list of options. Many of the files in the [samples](https://github.com/microsoft/cppgraphqlgen/tree/main/samples) directory were generated
+with `schemagen`, you can look at [samples/learn/schema/CMakeLists.txt](https://github.com/microsoft/cppgraphqlgen/blob/main/samples/learn/schema/CMakeLists.txt) for an example of how to call it with the canonical Star Wars sample [schema](https://github.com/microsoft/cppgraphqlgen/blob/main/samples/learn/schema/schema.learn.graphql):
+```
+Usage:  schemagen [options] <schema file> <output filename prefix> <output namespace>
+Command line options:
+  --version              Print the version number
+  -? [ --help ]          Print the command line options
+  -v [ --verbose ]       Verbose output including generated header names as
+                         well as sources
+  -s [ --schema ] arg    Schema definition file path
+  -p [ --prefix ] arg    Prefix to use for the generated C++ filenames
+  -n [ --namespace ] arg C++ sub-namespace for the generated types
+  --source-dir arg       Target path for the <prefix>Schema.cpp source file
+  --header-dir arg       Target path for the <prefix>Schema.h header file
+  --stubs                Unimplemented fields throw runtime exceptions instead
+                         of compiler errors
+  --no-introspection     Do not generate support for Introspection
+```