_eqref_class.hh

#ifndef WASMTIME_EQREF_CLASS_HH
#define WASMTIME_EQREF_CLASS_HH
 
#include <optional>
#include <wasmtime/conf.h>
 
#ifdef WASMTIME_FEATURE_GC
 
#include <wasmtime/_store_class.hh>
#include <wasmtime/eqref.h>
#include <wasmtime/helpers.hh>
#include <wasmtime/types/val.hh>
 
namespace wasmtime {
 
class AnyRef;
class StructRef;
class ArrayRef;
 
class EqRef {
  WASMTIME_REF_WRAPPER(EqRef, wasmtime_eqref);
 
public:
  static EqRef from_i31(Store::Context cx, uint32_t val) {
    wasmtime_eqref_t out;
    wasmtime_eqref_from_i31(cx.capi(), val, &out);
    return EqRef(out);
  }
 
  bool is_i31(Store::Context cx) const {
    return wasmtime_eqref_is_i31(cx.capi(), &raw);
  }
 
  std::optional<uint32_t> i31_get_u(Store::Context cx) const {
    uint32_t dst;
    if (wasmtime_eqref_i31_get_u(cx.capi(), &raw, &dst))
      return dst;
    return std::nullopt;
  }
 
  std::optional<int32_t> i31_get_s(Store::Context cx) const {
    int32_t dst;
    if (wasmtime_eqref_i31_get_s(cx.capi(), &raw, &dst))
      return dst;
    return std::nullopt;
  }
 
  bool is_struct(Store::Context cx) const {
    return wasmtime_eqref_is_struct(cx.capi(), &raw);
  }
 
  bool is_array(Store::Context cx) const {
    return wasmtime_eqref_is_array(cx.capi(), &raw);
  }
 
  AnyRef to_anyref() const;
 
  //
  // as_struct() defined after StructRef below.
  std::optional<StructRef> as_struct(Store::Context cx) const;
 
  //
  // as_array() defined after ArrayRef below.
  std::optional<ArrayRef> as_array(Store::Context cx) const;
 
  HeapType ty(Store::Context cx) const {
    wasmtime_heaptype_t out;
    bool ok = wasmtime_eqref_type(cx.capi(), &raw, &out);
    assert(ok);
    return HeapType(out);
  }
};
 
} // namespace wasmtime
 
#endif // WASMTIME_FEATURE_GC
 
#endif // WASMTIME_EQREF_CLASS_HH