Class: T::Private::Methods::DeclBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/types/private/methods/decl_builder.rb

Defined Under Namespace

Classes: BuilderError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(mod, raw) ⇒ DeclBuilder

Returns a new instance of DeclBuilder.



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# File 'lib/types/private/methods/decl_builder.rb', line 18

def initialize(mod, raw)
  # TODO RUBYPLAT-1278 - with ruby 2.5, use kwargs here
  @decl = Declaration.new(
    mod,
    ARG_NOT_PROVIDED, # params
    ARG_NOT_PROVIDED, # returns
    ARG_NOT_PROVIDED, # bind
    Modes.standard, # mode
    ARG_NOT_PROVIDED, # checked
    false, # finalized
    ARG_NOT_PROVIDED, # on_failure
    nil, # override_allow_incompatible
    ARG_NOT_PROVIDED, # type_parameters
    raw
  )
end

Instance Attribute Details

#decl ⇒ Object (readonly)

Returns the value of attribute decl.



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# File 'lib/types/private/methods/decl_builder.rb', line 8

def decl
  @decl
end

Instance Method Details

#abstract ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 118

def abstract
  check_live!

  case decl.mode
  when Modes.standard
    decl.mode = Modes.abstract
  when Modes.abstract
    raise BuilderError.new(".abstract cannot be repeated in a single signature")
  else
    raise BuilderError.new("`.abstract` cannot be combined with `.override` or `.overridable`.")
  end

  self
end

#bind(type) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 74

def bind(type)
  check_live!
  if !decl.bind.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .bind multiple times in a signature.")
  end

  decl.bind = type

  self
end

#checked(level) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 85

def checked(level)
  check_live!

  if !decl.checked.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .checked multiple times in a signature.")
  end
  if (level == :never || level == :compiled) && !decl.on_failure.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't use .checked(:#{level}) with .on_failure because .on_failure will have no effect.")
  end
  if !T::Private::RuntimeLevels::LEVELS.include?(level)
    raise BuilderError.new("Invalid `checked` level '#{level}'. Use one of: #{T::Private::RuntimeLevels::LEVELS}.")
  end

  decl.checked = level

  self
end

#final ⇒ Object

Raises:



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# File 'lib/types/private/methods/decl_builder.rb', line 133

def final
  check_live!
  raise BuilderError.new("The syntax for declaring a method final is `sig(:final) {...}`, not `sig {final. ...}`")
end

#finalize! ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 200

def finalize!
  check_live!

  if decl.returns.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You must provide a return type; use the `.returns` or `.void` builder methods.")
  end

  if decl.bind.equal?(ARG_NOT_PROVIDED)
    decl.bind = nil
  end
  if decl.checked.equal?(ARG_NOT_PROVIDED)
    default_checked_level = T::Private::RuntimeLevels.default_checked_level
    if (default_checked_level == :never || default_checked_level == :compiled) && !decl.on_failure.equal?(ARG_NOT_PROVIDED)
      raise BuilderError.new("To use .on_failure you must additionally call .checked(:tests) or .checked(:always), otherwise, the .on_failure has no effect.")
    end
    decl.checked = default_checked_level
  end
  if decl.on_failure.equal?(ARG_NOT_PROVIDED)
    decl.on_failure = nil
  end
  if decl.params.equal?(ARG_NOT_PROVIDED)
    decl.params = {}
  end
  if decl.type_parameters.equal?(ARG_NOT_PROVIDED)
    decl.type_parameters = {}
  end

  decl.finalized = true

  self
end

#on_failure(*args) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 103

def on_failure(*args)
  check_live!

  if !decl.on_failure.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .on_failure multiple times in a signature.")
  end
  if decl.checked == :never || decl.checked == :compiled
    raise BuilderError.new("You can't use .on_failure with .checked(:#{decl.checked}) because .on_failure will have no effect.")
  end

  decl.on_failure = args

  self
end

#overridable ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 156

def overridable
  check_live!

  case decl.mode
  when Modes.abstract
    raise BuilderError.new("`.overridable` cannot be combined with `.#{decl.mode}`")
  when Modes.override
    decl.mode = Modes.overridable_override
  when Modes.standard
    decl.mode = Modes.overridable
  when Modes.overridable, Modes.overridable_override
    raise BuilderError.new(".overridable cannot be repeated in a single signature")
  end

  self
end

#override(allow_incompatible: false) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 138

def override(allow_incompatible: false)
  check_live!

  case decl.mode
  when Modes.standard
    decl.mode = Modes.override
    decl.override_allow_incompatible = allow_incompatible
  when Modes.override, Modes.overridable_override
    raise BuilderError.new(".override cannot be repeated in a single signature")
  when Modes.overridable
    decl.mode = Modes.overridable_override
  else
    raise BuilderError.new("`.override` cannot be combined with `.abstract`.")
  end

  self
end

#params(**params) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 35

def params(**params)
  check_live!
  if !decl.params.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .params twice")
  end

  if params.empty?
    raise BuilderError.new("params expects keyword arguments")
  end
  decl.params = params

  self
end

#returns(type) ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 49

def returns(type)
  check_live!
  if decl.returns.is_a?(T::Private::Types::Void)
    raise BuilderError.new("You can't call .returns after calling .void.")
  end
  if !decl.returns.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .returns multiple times in a signature.")
  end

  decl.returns = type

  self
end

#type_parameters(*names) ⇒ Object

Declares valid type paramaters which can be used with ‘T.type_parameter` in this `sig`.

This is used for generic methods. Example usage:

sig do
  type_parameters(:U)
  .params(blk: T.proc.params(arg0: Elem).returns(T.type_parameter(:U)))
  .returns(T::Array[T.type_parameter(:U)])
end
def map(&blk); end



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# File 'lib/types/private/methods/decl_builder.rb', line 184

def type_parameters(*names)
  check_live!

  names.each do |name|
    raise BuilderError.new("not a symbol: #{name}") unless name.is_a?(Symbol)
  end

  if !decl.type_parameters.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .type_parameters multiple times in a signature.")
  end

  decl.type_parameters = names

  self
end

#void ⇒ Object 



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# File 'lib/types/private/methods/decl_builder.rb', line 63

def void
  check_live!
  if !decl.returns.equal?(ARG_NOT_PROVIDED)
    raise BuilderError.new("You can't call .void after calling .returns.")
  end

  decl.returns = T::Private::Types::Void.new

  self
end