Returns a Metadata with the information of the argument. Used to handle Log::Context#set and Log#Emitter.emit overloads.

Returns a Metadata with the information of the argument. Used to handle Log::Context#set and Log#Emitter.emit overloads.

Returns an empty Log::Metadata.

NOTE Since Log::Metadata is immutable, it's safe to share this instance.

Returns false (other can only be a Value here).

Returns a shallow copy of this object.

This allocates a new object and copies the contents of self into it.

Must yield this collection's elements to the block.

Returns true if self does not contain any element.

([] of Int32).empty? # => true
([1]).empty?         # => false
[nil, false].empty?  # => false

• #present? returns the inverse.

Returns a Log::Metadata with all the entries of self and other. If a key is defined in both, the values in other are used.

See Object#hash(hasher)

Returns Log::Metadata as JSON value.

NOTE require "log/json" is required to opt-in to this feature.

log_entry.context.to_json # => "{\"user_id\":1}"

Appends a short String representation of this object which includes its class name and its object address.

class Person
  def initialize(@name : String, @age : Int32)
  end
end

Person.new("John", 32).to_s # => #<Person:0x10a199f20>