Class: Solargraph::Source::Chain

Inherits:
Object
  • Object
show all
Defined in:
lib/solargraph/source/chain.rb,
lib/solargraph/source/chain/if.rb,
lib/solargraph/source/chain/or.rb,
lib/solargraph/source/chain/call.rb,
lib/solargraph/source/chain/hash.rb,
lib/solargraph/source/chain/head.rb,
lib/solargraph/source/chain/link.rb,
lib/solargraph/source/chain/array.rb,
lib/solargraph/source/chain/q_call.rb,
lib/solargraph/source/chain/literal.rb,
lib/solargraph/source/chain/z_super.rb,
lib/solargraph/source/chain/constant.rb,
lib/solargraph/source/chain/variable.rb,
lib/solargraph/source/chain/block_symbol.rb,
lib/solargraph/source/chain/block_variable.rb,
lib/solargraph/source/chain/class_variable.rb,
lib/solargraph/source/chain/global_variable.rb,
lib/solargraph/source/chain/instance_variable.rb

Overview

A chain of constants, variables, and method calls for inferring types of values.

Defined Under Namespace

Classes: Array, BlockSymbol, BlockVariable, Call, ClassVariable, Constant, GlobalVariable, Hash, Head, If, InstanceVariable, Link, Literal, Or, QCall, Variable, ZSuper

Constant Summary collapse

UNDEFINED_CALL = 
Chain::Call.new('<undefined>')
UNDEFINED_CONSTANT = 
Chain::Constant.new('<undefined>')
@@inference_stack = 
[]
@@inference_depth = 
0
@@inference_invalidation_key = 
nil
@@inference_cache = 
{}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(links, node = nil, splat = false) ⇒ Chain

Returns a new instance of Chain.

Parameters:

  • node (Parser::AST::Node, nil) (defaults to: nil)
  • links (::Array<Chain::Link>)
  • splat (Boolean) (defaults to: false) 


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# File 'lib/solargraph/source/chain.rb', line 46

def initialize links, node = nil, splat = false
  @links = links.clone
  @links.push UNDEFINED_CALL if @links.empty?
  head = true
  @links.map! do |link|
    result = (head ? link.clone_head : link.clone_body)
    head = false
    result
  end
  @node = node
  @splat = splat
end

Instance Attribute Details

Returns:



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# File 'lib/solargraph/source/chain.rb', line 39

def links
  @links
end

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/solargraph/source/chain.rb', line 41

def node
  @node
end

Instance Method Details

#base ⇒ Chain

Returns:



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# File 'lib/solargraph/source/chain.rb', line 60

def base
  @base ||= Chain.new(links[0..-2])
end

#constant? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 128

def constant?
  links.last.is_a?(Chain::Constant)
end

#define(api_map, name_pin, locals) ⇒ ::Array<Pin::Base>

Parameters:

Returns:



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# File 'lib/solargraph/source/chain.rb', line 69

def define api_map, name_pin, locals
  return [] if undefined?
  working_pin = name_pin
  links[0..-2].each do |link|
    pins = link.resolve(api_map, working_pin, locals)
    type = infer_first_defined(pins, working_pin, api_map, locals)
    return [] if type.undefined?
    working_pin = Pin::ProxyType.anonymous(type)
  end
  links.last.last_context = name_pin
  links.last.resolve(api_map, working_pin, locals)
end

#defined? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 123

def defined?
  !undefined?
end

#infer(api_map, name_pin, locals) ⇒ ComplexType

@sg-ignore

Parameters:

Returns:



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# File 'lib/solargraph/source/chain.rb', line 87

def infer api_map, name_pin, locals
  out = nil
  cached = @@inference_cache[[node, node.location, links.map(&:word), name_pin&.return_type, locals]] unless node.nil?
  return cached if cached && @@inference_invalidation_key == api_map.hash
  out = infer_uncached api_map, name_pin, locals
  if @@inference_invalidation_key != api_map.hash
    @@inference_cache = {}
    @@inference_invalidation_key = api_map.hash
  end
  @@inference_cache[[node, node.location, links.map(&:word), name_pin&.return_type, locals]] = out unless node.nil?
  out
end

#infer_uncached(api_map, name_pin, locals) ⇒ ComplexType

Parameters:

Returns:



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# File 'lib/solargraph/source/chain.rb', line 104

def infer_uncached api_map, name_pin, locals
  from_here = base.infer(api_map, name_pin, locals) unless links.length == 1
  if from_here
    name_pin = name_pin.proxy(from_here)
  end
  pins = define(api_map, name_pin, locals)
  type = infer_first_defined(pins, links.last.last_context, api_map, locals)
  maybe_nil(type)
end

#literal? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 115

def literal?
  links.last.is_a?(Chain::Literal)
end

#nullable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 136

def nullable?
  links.any?(&:nullable?)
end

#splat? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 132

def splat?
  @splat
end

#undefined? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/solargraph/source/chain.rb', line 119

def undefined?
  links.any?(&:undefined?)
end