ultra::nullary Class Reference

#include <nullary.h>

Inheritance diagram for ultra::nullary:

Public Member Functions
virtual value_t	eval () const =0
value_t	instance () const final
std::string	to_string (format=c_format) const override
Public Member Functions inherited from ultra::terminal
std::string	to_string (format=c_format) const override
	symbol (const std::string &, category_t=default_category)
Public Member Functions inherited from ultra::symbol
	symbol (const std::string &, category_t=default_category)
virtual	~symbol ()=default
	Virtual destructor to allow safe polymorphic deletion.
category_t	category () const noexcept
opcode_t	opcode () const noexcept
const std::string &	name () const noexcept
void	category (category_t) noexcept
virtual bool	is_valid () const

Additional Inherited Members
Public Types inherited from ultra::symbol
enum	format { c_format , cpp_format , python_format , sup_format }
	Supported rendering formats for symbol stringification.
using	category_t = unsigned
using	opcode_t = unsigned
Static Public Attributes inherited from ultra::symbol
static constexpr category_t	default_category = 0
	Default category assigned when typing is not used.
static constexpr category_t	undefined_category
	Sentinel value indicating that the category has not yet been assigned.

Detailed Description

A lambda function without arguments.

Function without arguments can be meaningful and not necessarily constant (due to side effects). Such functions may have some hidden input, such as global variables or the whole state of the system (time, free memory...).

A lambda function (aka anonymous function) is a literal for the function type.

Member Function Documentation

instance()

value_t ultra::nullary::instance ( ) const

inlinenodiscardfinalvirtual

Produce the runtime value of the terminal.

Returns

the value associated with this terminal

This function returns the value represented by the terminal when the program is evaluated. The returned value may depend on the evaluation context (e.g. the current input vector), but does not depend on any child expressions.

Note

Implementations must not throw exceptions and should be side-effect free to preserve referential transparency during program evaluation.

Implements ultra::terminal.

to_string()

std::string ultra::nullary::to_string ( format = c_format ) const

inlinenodiscardoverridevirtual

Implements ultra::symbol.

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

• nullary.h