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.

3 files changed, 13 insertions, 0 deletions

diff --git a/source/compiler-core/slang-artifact-info.cpp b/source/compiler-core/slang-artifact-info.cpp
index 1b9209516..b67adb666 100644
--- a/source/compiler-core/slang-artifact-info.cpp
+++ b/source/compiler-core/slang-artifact-info.cpp
@@ -152,6 +152,12 @@ static const KindExtension g_cpuKindExts[] =
     return info.isSet(ArtifactPayloadInfo::Flag::IsGpuNative) && info.flavor == ArtifactPayloadInfo::Flavor::Binary;
 }
 
+/* static */bool ArtifactInfoUtil::isPayloadCpuTarget(Payload payload)
+{
+    return isPayloadCpuBinary(payload) ||
+        (payload == Payload::C || payload == Payload::CPP);
+}
+
 /* static */UnownedStringSlice ArtifactInfoUtil::getDefaultExtensionForPayload(Payload payload)
 {
     switch (payload)
diff --git a/source/compiler-core/slang-artifact-info.h b/source/compiler-core/slang-artifact-info.h
index 1db3712dc..e63349937 100644
--- a/source/compiler-core/slang-artifact-info.h
+++ b/source/compiler-core/slang-artifact-info.h
@@ -67,6 +67,12 @@ struct ArtifactInfoUtil
         /// Returns true if the payload type is applicable to the GPU
     static bool isPayloadGpuBinary(Payload payload);
 
+        /// True if is a CPU target
+    static bool isPayloadCpuTarget(Payload payload);
+
+        /// True if is a CPU target - either
+    static bool isCpuTarget(const ArtifactDesc& desc) { return isPayloadCpuTarget(desc.payload); }
+
         /// True if is a CPU binary
     static bool isCpuBinary(const ArtifactDesc& desc) { return isPayloadCpuBinary(desc.payload); }
         /// True if is a GPU binary
diff --git a/source/compiler-core/slang-artifact.cpp b/source/compiler-core/slang-artifact.cpp
index dfa9e645b..5e5b93578 100644
--- a/source/compiler-core/slang-artifact.cpp
+++ b/source/compiler-core/slang-artifact.cpp
@@ -38,6 +38,7 @@ namespace Slang {
         case SLANG_CUDA_SOURCE:             return make(Kind::Text, Payload::CUDA, Style::Kernel, 0);
         case SLANG_PTX:                     return make(Kind::Executable, Payload::PTX, Style::Kernel, 0);
         case SLANG_OBJECT_CODE:             return make(Kind::ObjectCode, Payload::HostCPU, Style::Kernel, 0);
+        case SLANG_HOST_HOST_CALLABLE:      return make(Kind::Callable, Payload::HostCPU, Style::Host, 0);
         default: break;
     }