YT-19210: expose YQL shared library for YT.

After this, a new target libyqlplugin.so appears. in open-source cmake build.
Diff in open-source YDB repo looks like the following: https://paste.yandex-team.ru/f302bdb4-7ef2-4362-91c7-6ca45f329264

1 files changed, 61 insertions, 0 deletions

diff --git a/library/cpp/skiff/skiff_schema-inl.h b/library/cpp/skiff/skiff_schema-inl.h
new file mode 100644
index 0000000000..d66325b222
--- /dev/null
+++ b/library/cpp/skiff/skiff_schema-inl.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#ifndef SKIFF_SCHEMA_H
+#error "Direct inclusion of this file is not allowed, include skiff_schema.h"
+// For the sake of sane code completion.
+#include "skiff_schema.h"
+#endif
+#undef SKIFF_SCHEMA_H
+
+namespace NSkiff {
+
+////////////////////////////////////////////////////////////////////////////////
+
+inline bool IsSimpleType(EWireType type)
+{
+    switch (type) {
+        case EWireType::Int8:
+        case EWireType::Int16:
+        case EWireType::Int32:
+        case EWireType::Int64:
+        case EWireType::Int128:
+
+        case EWireType::Uint8:
+        case EWireType::Uint16:
+        case EWireType::Uint32:
+        case EWireType::Uint64:
+        case EWireType::Uint128:
+
+        case EWireType::Double:
+        case EWireType::Boolean:
+        case EWireType::String32:
+        case EWireType::Yson32:
+        case EWireType::Nothing:
+            return true;
+        case EWireType::Tuple:
+        case EWireType::Variant8:
+        case EWireType::Variant16:
+        case EWireType::RepeatedVariant8:
+        case EWireType::RepeatedVariant16:
+            return false;
+    }
+    Y_FAIL();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+template <EWireType WireType>
+TComplexSchema<WireType>::TComplexSchema(TSkiffSchemaList elements)
+    : TSkiffSchema(WireType)
+    , Elements_(std::move(elements))
+{ }
+
+template <EWireType WireType>
+const TSkiffSchemaList& TComplexSchema<WireType>::GetChildren() const
+{
+    return Elements_;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+} // namespace NSkiff