Module: Contracts::DSL::ClassMethods
- Defined in:
- lib/ruby_contracts/dsl.rb
Instance Method Summary collapse
- #__contract_failure!(name, message, result, *args) ⇒ Object
- #__contracts_for(name, current_contracts = nil) ⇒ Object
- #__contracts_initialize ⇒ Object
- #__eval_after_contracts(name, context, arguments, result) ⇒ Object
- #__eval_before_contracts(name, context, arguments) ⇒ Object
- #inherited(subclass) ⇒ Object
- #method_added(name) ⇒ Object
- #post(message = nil, &block) ⇒ Object
- #pre(message = nil, &block) ⇒ Object
- #type(options) ⇒ Object
Instance Method Details
#__contract_failure!(name, message, result, *args) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 41 def __contract_failure!(name, , result, *args) args.pop if args.last.kind_of?(Proc) raise Contracts::Error.new("#{self}##{name}(#{args.join ', '}) => #{result || "?"} ; #{}.") end |
#__contracts_for(name, current_contracts = nil) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 27 def __contracts_for(name, current_contracts=nil) if @__contracts_for.has_key?(name) && !current_contracts @__contracts_for[name] else contracts = ancestors[1..-1].reverse.reduce([]) do |c, klass| ancestor_hash = klass.instance_variable_get('@__contracts_for') c += ancestor_hash[name] if ancestor_hash && ancestor_hash.has_key?(name) c end contracts << current_contracts if current_contracts @__contracts_for[name] = contracts end end |
#__contracts_initialize ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 22 def __contracts_initialize @__contracts = Contracts::List.new @__contracts_for = {} end |
#__eval_after_contracts(name, context, arguments, result) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 106 def __eval_after_contracts(name, context, arguments, result) __contracts_for(name).each do |contracts| after_contracts = contracts.after_contracts next if after_contracts.empty? after_contracts.each do |contract| begin unless satisfied = contract.satisfied?(context, arguments, result) __contract_failure!(name, contract., result, arguments) break end rescue __contract_failure!(name, "Contract evaluation failed with #{$!} for #{contract.class} #{contract.}", result, arguments) end end end end |
#__eval_before_contracts(name, context, arguments) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 81 def __eval_before_contracts(name, context, arguments) last_failure_msg = nil __contracts_for(name).each do |contracts| before_contracts = contracts.before_contracts next if before_contracts.empty? success = true before_contracts.each do |contract| begin unless satisfied = contract.satisfied?(context, arguments) last_failure_msg = contract. success = false break end rescue last_failure_msg = "Contract evaluation failed with #{$!} for #{contract.class} #{contract.}" success = false break end end return if success end __contract_failure!(name, last_failure_msg, nil, arguments) if last_failure_msg end |
#inherited(subclass) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 17 def inherited(subclass) super subclass.__contracts_initialize end |
#method_added(name) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 59 def method_added(name) super return if @__skip_other_contracts_definitions __contracts = __contracts_for(name.to_s, @__contracts) @__contracts = Contracts::List.new if !__contracts.first.empty? @__skip_other_contracts_definitions = true original_method = instance_method(name) define_method(name) do |*args, &block| __args = block.nil? ? args : args + [block] self.class.__eval_before_contracts(name.to_s, self, __args) result = original_method.bind(self).(*args, &block) self.class.__eval_after_contracts(name.to_s, self, __args, result) return result end @__skip_other_contracts_definitions = false end end |
#post(message = nil, &block) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 55 def post(=nil, &block) @__contracts << Contracts::Postcondition.new(, block) end |
#pre(message = nil, &block) ⇒ Object
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# File 'lib/ruby_contracts/dsl.rb', line 51 def pre(=nil, &block) @__contracts << Contracts::Precondition.new(, block) end |