COM interfaces with host callable (#2258)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Use TerminatedUnownedStringSlice for literals in output C++.

* Remove Escape/Unescape functions used in slang-token-reader.cpp
Add target type of 'host-cpp' etc to map to the target types.

* Fix some corner cases around string encoding.

* Added unit test for string escaping.
Fixed some assorted escaping bugs.

* Updated test output.

* Added decode test.

* Stop using hex output, to get around 'greedy' aspect. Use octal instead.

* Added HostHostCallable
Small changes to use ArtifactDesc/Info instead of large switches.

* Fix C++ emit to handle arbitrary function export.

* Add options handling for callable without an output being specified.

* Can compile with COM interface. Added example using com interface.

* Use the IR Ptr type instead of hack in C++ emit for interfaces.

* Fix issue with outputting the COM call when ptr is used.

* Fix crash issue on compilation failure.

1 files changed, 15 insertions, 0 deletions

diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index 875f18980..9825e4e23 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -2032,6 +2032,18 @@ struct OptionsParser
             }
         }
 
+        // If we don't have any raw outputs but do have a raw target,
+        // and output type is callable, add an empty' rawOutput.
+        if (rawOutputs.getCount() == 0 && 
+            rawTargets.getCount() == 1 && 
+            ArtifactDesc::makeFromCompileTarget(asExternal(rawTargets[0].format)).kind == ArtifactKind::Callable)
+        {
+            RawOutput rawOutput;
+            rawOutput.impliedFormat = rawTargets[0].format;
+            rawOutput.targetIndex = 0;
+            rawOutputs.add(rawOutput);
+        }
+
         // Consider the output files specified via `-o` and try to figure
         // out how to deal with them.
         //
@@ -2083,6 +2095,8 @@ struct OptionsParser
                     case CodeGenTarget::CPPSource:
                     case CodeGenTarget::PTX:
                     case CodeGenTarget::CUDASource:
+
+                    case CodeGenTarget::HostHostCallable:
                     case CodeGenTarget::ShaderHostCallable:
                     case CodeGenTarget::HostExecutable:
                     case CodeGenTarget::ShaderSharedLibrary:
@@ -2099,6 +2113,7 @@ struct OptionsParser
             }
         }
 
+
         // Now that we've diagnosed the output paths, we can add them
         // to the compile request at the appropriate locations.
         //