types/extern.hh

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#ifndef WASMTIME_TYPES_EXTERN_HH
#define WASMTIME_TYPES_EXTERN_HH
 
#include <variant>
#include <wasm.h>
#include <wasmtime/types/export.hh>
#include <wasmtime/types/func.hh>
#include <wasmtime/types/global.hh>
#include <wasmtime/types/import.hh>
#include <wasmtime/types/memory.hh>
#include <wasmtime/types/table.hh>
#include <wasmtime/types/tag.hh>
 
namespace wasmtime {
 
class ExternType {
  friend class ExportType;
  friend class ImportType;
 
public:
  typedef std::variant<FuncType::Ref, GlobalType::Ref, TableType::Ref,
                       MemoryType::Ref, TagType::Ref>
      Ref;
 
  static Ref from_import(ImportType::Ref ty) {
    // TODO: this would ideally be some sort of implicit constructor, unsure how
    // to do that though...
    return ref_from_c(ty.raw_type());
  }
 
  static Ref from_export(ExportType::Ref ty) {
    // TODO: this would ideally be some sort of implicit constructor, unsure how
    // to do that though...
    return ref_from_c(ty.raw_type());
  }
 
private:
  static Ref ref_from_c(const wasm_externtype_t *ptr) {
    switch (wasm_externtype_kind(ptr)) {
    case WASM_EXTERN_FUNC:
      return wasm_externtype_as_functype_const(ptr);
    case WASM_EXTERN_GLOBAL:
      return wasm_externtype_as_globaltype_const(ptr);
    case WASM_EXTERN_TABLE:
      return wasm_externtype_as_tabletype_const(ptr);
    case WASM_EXTERN_MEMORY:
      return wasm_externtype_as_memorytype_const(ptr);
    case WASM_EXTERN_TAG:
      return wasm_externtype_as_tagtype_const(ptr);
    }
    std::abort();
  }
};
 
}; // namespace wasmtime
 
#endif // WASMTIME_TYPES_EXTERN_HH