tvm::DictAttrs Class Reference

Managed reference to DictAttrsNode. More...

#include <attrs.h>

Inheritance diagram for tvm::DictAttrs:

Collaboration diagram for tvm::DictAttrs:

Public Types
using	__PtrType = std::conditional_t< DictAttrsNode::_type_mutable, DictAttrsNode *, const DictAttrsNode * >
using	ContainerType = DictAttrsNode

Public Member Functions
	DictAttrs (ffi::Map< ffi::String, Any > dict={})
	Construct a DictAttrs backed by DictAttrsNode. More...
	DictAttrs (DictAttrs &&other) noexcept
	Move constructor that leaves the source in a defined-but-empty state rather than null, preserving the NOTNULLABLE invariant even after std::move. More...
DictAttrs &	operator= (DictAttrs &&other) noexcept
	Move assignment that leaves the source in a defined-but-empty state rather than null, preserving the NOTNULLABLE invariant even after std::move. More...
	DictAttrs (const DictAttrs &other)=default
DictAttrs &	operator= (const DictAttrs &other)=default
template<typename TObjectRef >
ffi::Optional< TObjectRef >	GetAttr (const std::string &attr_key, ffi::Optional< TObjectRef > default_value=ffi::Optional< TObjectRef >(std::nullopt)) const
	Get a function attribute. More...
template<typename TObjectRef >
ffi::Optional< TObjectRef >	GetAttr (const std::string &attr_key, TObjectRef default_value) const
bool	HasNonzeroAttr (const std::string &attr_key) const
	Check whether the function has an non-zero integer attr. More...
	DictAttrs (::tvm::ffi::UnsafeInit tag)
__PtrType	operator-> () const
__PtrType	get () const
	TVM_DEFINE_OBJECT_REF_COW_METHOD (DictAttrsNode)
Public Member Functions inherited from tvm::Attrs
	TVM_FFI_DEFINE_OBJECT_REF_METHODS_NULLABLE (Attrs, ffi::ObjectRef, AttrsNode)

Static Public Attributes
static constexpr bool	_type_is_nullable = false

Detailed Description

Managed reference to DictAttrsNode.

See also

DictAttrsNode.

Note

DictAttrs is NOTNULLABLE: every instance must hold a backing DictAttrsNode. The class enforces this end-to-end by:

• the default constructor (no args) allocating an empty backing,
• the copy/move ctors and assignments leaving the moved-from instance in a defined-but-empty state rather than null,
• the FFI type traits rejecting None at deserialization boundaries (since _type_is_nullable == false), and
• the FFI lambda for ir.IRModule explicitly normalizing a missing/None attrs argument to DictAttrs() before forwarding to the C++ constructor. Callers (including third-party code via templates like WithAttr) can therefore rely on attrs->dict being safe to dereference without a .defined() guard.

Member Typedef Documentation

__PtrType

using tvm::DictAttrs::__PtrType = std::conditional_t<DictAttrsNode::_type_mutable, DictAttrsNode*, const DictAttrsNode*>

ContainerType

using tvm::DictAttrs::ContainerType = DictAttrsNode

Constructor & Destructor Documentation

DictAttrs() [1/4]

tvm::DictAttrs::DictAttrs ( ffi::Map< ffi::String, Any >  dict = {} )

inlineexplicit

Construct a DictAttrs backed by DictAttrsNode.

The no-argument form constructs an empty (but always defined) DictAttrs.

Parameters

dict	The attributes.

DictAttrs() [2/4]

tvm::DictAttrs::DictAttrs ( DictAttrs &&  other )

inlinenoexcept

Move constructor that leaves the source in a defined-but-empty state rather than null, preserving the NOTNULLABLE invariant even after std::move.

DictAttrs() [3/4]

tvm::DictAttrs::DictAttrs ( const DictAttrs &  other )

default

DictAttrs() [4/4]

tvm::DictAttrs::DictAttrs ( ::tvm::ffi::UnsafeInit  tag )

inlineexplicit

Member Function Documentation

get()

__PtrType tvm::DictAttrs::get ( ) const

inline

GetAttr() [1/2]

template<typename TObjectRef >

ffi::Optional<TObjectRef> tvm::DictAttrs::GetAttr ( const std::string &  attr_key, ffi::Optional< TObjectRef >  default_value = ffi::Optional<TObjectRef>(std::nullopt)  ) const

inline

Get a function attribute.

Parameters

attr_key	The attribute key.
default_value	The default value if the key does not exist, defaults to nullptr.

Returns

The result

Template Parameters

TOBjectRef

the expected object type.

Exceptions

Error

if the key exists but the value does not match TObjectRef

void GetAttrExample(const BaseFunc& f) {
  auto value = f->attrs.GetAttr<int64_t>("AttrKey", 0);
}

GetAttr() [2/2]

template<typename TObjectRef >

ffi::Optional<TObjectRef> tvm::DictAttrs::GetAttr ( const std::string &  attr_key, TObjectRef  default_value  ) const

inline

HasNonzeroAttr()

bool tvm::DictAttrs::HasNonzeroAttr ( const std::string &  attr_key ) const

inline

Check whether the function has an non-zero integer attr.

This function can be used to check whether an optional attribute mark(e.g. inline) exists.

Parameters

attr_key

The key to the attribute.

Returns

The check result.

void HasNonzeroAttrExample(const BaseFunc& f) {
  if (f->HasNonzeroAttr(attr::kInline)) {
    // inline the function.
  }
}

operator->()

__PtrType tvm::DictAttrs::operator-> ( ) const

inline

operator=() [1/2]

DictAttrs& tvm::DictAttrs::operator= ( const DictAttrs &  other )

default

operator=() [2/2]

DictAttrs& tvm::DictAttrs::operator= ( DictAttrs &&  other )

inlinenoexcept

Move assignment that leaves the source in a defined-but-empty state rather than null, preserving the NOTNULLABLE invariant even after std::move.

TVM_DEFINE_OBJECT_REF_COW_METHOD()

tvm::DictAttrs::TVM_DEFINE_OBJECT_REF_COW_METHOD

(

DictAttrsNode

)

Member Data Documentation

_type_is_nullable

constexpr bool tvm::DictAttrs::_type_is_nullable = false

staticconstexpr

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The documentation for this class was generated from the following file:

• include/tvm/ir/attrs.h