Class: Decode::RBS::Method

Inherits:
Wrapper
  • Object
show all
Defined in:
lib/decode/rbs/method.rb

Overview

Represents a Ruby method definition wrapper for RBS generation.

Instance Method Summary collapse

Methods inherited from Wrapper

#comment, #tags

Constructor Details

#initialize(definition) ⇒ Method

Initialize a new method wrapper.



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# File 'lib/decode/rbs/method.rb', line 17

def initialize(definition)
	super
	@signatures = nil
	@keyword_arguments = nil
	@return_type = nil
	@parameters = nil
end

Instance Method Details

#build_function_type_from_ast(definition, index) ⇒ Object

Build a complete RBS function type from AST information.



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# File 'lib/decode/rbs/method.rb', line 121

def build_function_type_from_ast(definition, index)
	node = definition.node
	# Only return nil if we don't have an AST node at all
	return nil unless node&.respond_to?(:parameters)
	
	doc_types = extract_documented_parameter_types(definition)
	
	required_positionals = []
	optional_positionals = []
	rest_positionals = nil
	required_keywords = {}
	optional_keywords = {}
	keyword_rest = nil
	
	# Only process parameters if the node actually has them:
	if node.parameters
		# Handle required positional parameters:
		if node.parameters.respond_to?(:requireds) && node.parameters.requireds
			node.parameters.requireds.each do |param|
				name = param.name
				type = doc_types[name.to_s] || ::RBS::Parser.parse_type("untyped")
				
				required_positionals << ::RBS::Types::Function::Param.new(
					type: type,
					name: name.to_sym
				)
			end
		end
		
		# Handle optional positional parameters (with defaults):
		if node.parameters.respond_to?(:optionals) && node.parameters.optionals
			node.parameters.optionals.each do |param|
				name = param.name
				# For optional parameters, use the documented type as-is (don't make it nullable):
				type = doc_types[name.to_s] || ::RBS::Parser.parse_type("untyped")
				
				optional_positionals << ::RBS::Types::Function::Param.new(
					type: type,
					name: name.to_sym
				)
			end
		end
		
		# Handle rest parameter (*args):
		if node.parameters.respond_to?(:rest) && node.parameters.rest
			rest_param = node.parameters.rest
			name = rest_param.respond_to?(:name) && rest_param.name ? rest_param.name : :args
			base_type = doc_types[name.to_s] || ::RBS::Parser.parse_type("untyped")
			
			rest_positionals = ::RBS::Types::Function::Param.new(
				type: base_type,
				name: name.to_sym
			)
		end
		
		# Handle keyword parameters:
		if node.parameters.respond_to?(:keywords) && node.parameters.keywords
			node.parameters.keywords.each do |param|
				name = param.name
				type = doc_types[name.to_s] || ::RBS::Parser.parse_type("untyped")
				
				if param.respond_to?(:value) && param.value
					# Has default value - optional keyword:
					optional_keywords[name.to_sym] = type
				else
					# No default value - required keyword:
					required_keywords[name.to_sym] = type
				end
			end
		end
		
		# Handle keyword rest parameter (**kwargs):
		if node.parameters.respond_to?(:keyword_rest) && node.parameters.keyword_rest
			rest_param = node.parameters.keyword_rest
			if rest_param.respond_to?(:name) && rest_param.name
				name = rest_param.name
				base_type = doc_types[name.to_s] || ::RBS::Parser.parse_type("untyped")
				
				keyword_rest = ::RBS::Types::Function::Param.new(
					type: base_type,
					name: name.to_sym
				)
			end
		end
	end
	
	return_type = extract_return_type(@definition, index) || ::RBS::Parser.parse_type("untyped")
	
	::RBS::Types::Function.new(
		required_positionals: required_positionals,
		optional_positionals: optional_positionals,
		rest_positionals: rest_positionals,
		trailing_positionals: [],
		required_keywords: required_keywords,
		optional_keywords: optional_keywords,
		rest_keywords: keyword_rest,
		return_type: return_type
	)
end

#keyword_arguments ⇒ Object

Extract keyword arguments from the method definition.



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# File 'lib/decode/rbs/method.rb', line 33

def keyword_arguments
	@keyword_arguments ||= extract_keyword_arguments(@definition, nil)
end

#parameters ⇒ Object

Extract parameters from the method definition.



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# File 'lib/decode/rbs/method.rb', line 45

def parameters
	@parameters ||= extract_parameters(@definition, nil)
end

#return_type ⇒ Object

Extract return type from the method definition.



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# File 'lib/decode/rbs/method.rb', line 39

def return_type
	@return_type ||= extract_return_type(@definition, nil) || ::RBS::Parser.parse_type("untyped")
end

#signatures ⇒ Object

Extract method signatures from the method definition.



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# File 'lib/decode/rbs/method.rb', line 27

def signatures
	@signatures ||= extract_signatures
end

#to_rbs_ast(index = nil) ⇒ Object

Convert the method definition to RBS AST



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# File 'lib/decode/rbs/method.rb', line 50

def to_rbs_ast(index = nil)
	method_name = @definition.name
	comment = self.comment
	
	overloads = []
	if signatures.any?
		signatures.each do |signature_string|
			method_type = ::RBS::Parser.parse_method_type(signature_string)
			overloads << ::RBS::AST::Members::MethodDefinition::Overload.new(
				method_type: method_type,
				annotations: []
			)
		end
	else
		return_type = self.return_type
		
		# Get parameters using AST-based detection
		if ast_function = build_function_type_from_ast(@definition, index)
			method_type = ::RBS::MethodType.new(
				type_params: [],
				type: ast_function,
				block: extract_block_type(@definition, index),
				location: nil
			)
		else
			# Fall back to documentation-based approach
			parameters = self.parameters
			keywords = self.keyword_arguments
			block_type = extract_block_type(@definition, index)
			
			method_type = ::RBS::MethodType.new(
				type_params: [],
				type: ::RBS::Types::Function.new(
					required_positionals: parameters,
					optional_positionals: [],
					rest_positionals: nil,
					trailing_positionals: [],
					required_keywords: keywords[:required],
					optional_keywords: keywords[:optional],
					rest_keywords: nil,
					return_type: return_type
				),
				block: block_type,
				location: nil
			)
		end
		
		overloads << ::RBS::AST::Members::MethodDefinition::Overload.new(
			method_type: method_type,
			annotations: []
		)
	end
	
	kind = @definition.receiver ? :singleton : :instance
	
	::RBS::AST::Members::MethodDefinition.new(
	name: method_name.to_sym,
	kind: kind,
	overloads: overloads,
	annotations: [],
	location: nil,
	comment: comment,
	overloading: false,
	visibility: @definition.visibility || :public
)
end