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Contents
module Domainic
module Type
# A type that validates objects based on their method interface
#
# This type implements duck typing validation by checking whether objects respond
# to specific methods. It supports both positive validation (must respond to methods)
# and negative validation (must not respond to methods).
#
# @example Validating a simple interface
# type = DuckType.responding_to(:to_s).not_responding_to(:to_h)
# type.validate("string") # => true
# type.validate(Object.new) # => true
# type.validate({}) # => false (responds to :to_h)
#
# @author {https://aaronmallen.me Aaron Allen}
# @since 0.1.0
class DuckType
include Behavior
# Add method exclusion constraints to the type
#
# @example
# type = DuckType.new.not_responding_to(:foo, :bar)
#
# @param methods [Array<String, Symbol>] the methods that must not be present
#
# @return [self] the type for method chaining
def not_responding_to: (*String | Symbol methods) -> self
# Add method presence constraints to the type
#
# @example
# type = DuckType.new.responding_to(:foo, :bar)
#
# @param methods [Array<String, Symbol>] the methods that must be present
#
# @return [self] the type for method chaining
def responding_to: (*String | Symbol methods) -> self
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems