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Allow passing block to Data definition #358

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6 changes: 5 additions & 1 deletion lib/literal/data.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,13 @@ class Literal::Data < Literal::DataStructure
class << self
def [](...) = new(...)

def define(**properties)
def define(**properties, &body)
Class.new(self) do
properties.each { |name, type| prop(name, type) }

if block_given?
class_exec(&body)
end
end
end

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13 changes: 13 additions & 0 deletions test/data.test.rb
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Expand Up @@ -90,6 +90,19 @@ class ReaderlessExample < Literal::Data
assert_equal(person_with_define.to_h, person.to_h)
end

test "define block" do
Rect = Literal::Data.define(w: Integer, h: Integer) do
prop :filled, _Boolean, default: false, predicate: :public

def area = @w * @h
end

rect = Rect[w: 5, h: 4, filled: true]

assert_equal(rect.area, 20)
assert rect.filled?
end

test "initialize with [] method" do
person_a = Person.new(name: "John")
person_b = Person[name: "John"]
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