abstract struct Value

Overview

Value is the base type of the primitive types (Nil, Bool, Char, Number), Symbol, Pointer, Tuple, StaticArray and all structs.

A Value is passed by value: when you pass it to methods, return it from methods or assign it to variables, a copy of the value is actually passed. This is not important for nil, bools, integers, floats, symbols, pointers and tuples, because they are immutable, but with a mutable Struct or with a StaticArray you have to be careful. Read their documentation to learn more about this.

Direct Known Subclasses

Defined in:

json/any.cr
value.cr
yaml/any.cr

Instance Method Summary

Instance methods inherited from class Object

! : Bool !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as

Class methods inherited from class Object

from_json(string_or_io, root : String)
from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml

Instance Method Detail

def ==(other : JSON::Any) #

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def ==(other : YAML::Any) #

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def ==(other) #

Returns false.


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def dup #

Returns a shallow copy of this object.

Because Value is a value type, this method returns self, which already involves a shallow copy of this object because value types are passed by value.


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