Struct command_context_base

Defined in File command.h

Inheritance Relationships

Derived Type

public liberate::concurrency::command::command_context< paramsT, resultsT > (Template Struct command_context)

Struct Documentation

struct command_context_base

The commmand_context_base is a simple base type for command_context, which largely exists for providing a virtual destructor so that derived types destruct properly.

Concrete command contexts are specializations of a template based on the command parameters, which means providing a different means for a virtual base type is not possible.

Subclassed by liberate::concurrency::command::command_context< paramsT, resultsT >

Public Functions

inline explicit command_context_base(command_type _type)

Constructor for the context; takes a command type.

Parameters: _type – [in] the command type for this context.

virtual ~command_context_base() = default: Virtual destructor

template<typename derivedT> inline derivedT *as(command_type const &target_type)

Cast this command_context_base into the given type if the argument matches the enclosed type.

Parameters: target_type – [in] The type we expect.
Returns: a raw pointer to the derived type, or nullptr on mismatch.

template<typename derivedT> inline derivedT const *as(command_type const &target_type) const

Cast this command_context_base into the given type if the argument matches the enclosed type.

Parameters: target_type – [in] The type we expect.
Returns: a raw pointer to the derived type, or nullptr on mismatch.

Public Members

command_type const type: The context’s type is a publicly accessible member.

void *context = nullptr: Command contexts can also hold context state; this pointer is for that purpose.