Class: SorbetBaml::TypeMapper

Inherits:
Object
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/sorbet_baml/type_mapper.rb

Overview

Maps Sorbet type objects to BAML type strings

Class Method Summary collapse

Class Method Details

.map_array_type(type_object) ⇒ Object 



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# File 'lib/sorbet_baml/type_mapper.rb', line 107

def self.map_array_type(type_object)
  element_type = map_type(type_object.type)

  # If element type contains union (|), wrap in parentheses for correct precedence
  if element_type.include?('|')
    "(#{element_type})[]"
  else
    "#{element_type}[]"
  end
end

.map_hash_type(type_object) ⇒ Object 



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# File 'lib/sorbet_baml/type_mapper.rb', line 119

def self.map_hash_type(type_object)
  # T::Types::TypedHash has keys and values methods
  key_type = map_type(type_object.keys)
  value_type = map_type(type_object.values)
  "map<#{key_type}, #{value_type}>"
end

.map_simple_type(raw_type) ⇒ Object 



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# File 'lib/sorbet_baml/type_mapper.rb', line 37

def self.map_simple_type(raw_type)
  case raw_type.name
  when 'String'
    'string'
  when 'Integer'
    'int'
  when 'Float'
    'float'
  when 'TrueClass', 'FalseClass'
    'bool'
  when 'NilClass'
    'null'
  when 'Symbol'
    'string'
  when 'Date', 'DateTime', 'Time'
    'string'
  else
    # Check if it's a T::Struct or T::Enum
    if raw_type < T::Struct || raw_type < T::Enum
      type_name = raw_type.name || raw_type.to_s
      type_name.split('::').last || 'unknown'
    else
      'unknown'
    end
  end
end

.map_type(type_object) ⇒ Object 



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# File 'lib/sorbet_baml/type_mapper.rb', line 12

def self.map_type(type_object)
  return 'string' if type_object.nil?

  case type_object
  when T::Types::Simple
    map_simple_type(type_object.raw_type)
  when T::Types::TypedArray
    map_array_type(type_object)
  when T::Types::TypedHash
    map_hash_type(type_object)
  when T::Types::Untyped
    # T.untyped maps to BAML's json type for dynamic values
    'json'
  else
    # Check if it's a union type (T.nilable or T.any)
    if type_object.respond_to?(:types)
      map_union_type(type_object)
    else
      # Fallback for unknown types
      'unknown'
    end
  end
end

.map_union_type(type_object) ⇒ Object 



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# File 'lib/sorbet_baml/type_mapper.rb', line 65

def self.map_union_type(type_object)
  types = type_object.types

  # Only T::Types::Simple has raw_type - check type class before accessing
  nil_type = types.find { |t| nil_type?(t) }
  non_nil_types = types.reject { |t| nil_type?(t) }

  return 'null' if non_nil_types.empty?

  if non_nil_types.size == 1
    # This is T.nilable(T) - single type with nil
    base_type = map_type(non_nil_types.first)
    return nil_type ? "#{base_type}?" : base_type
  end

  # This is T.any with multiple types
  mapped_types = non_nil_types.map { |t| map_type(t) }

  # Special case: TrueClass + FalseClass = bool
  union_string = if mapped_types.sort == %w[bool bool]
                   'bool'
                 else
                   # Remove duplicates and join
                   mapped_types.uniq.join(' | ')
                 end

  # If nil is present, wrap in parentheses and add ?
  if nil_type
    "(#{union_string})?"
  else
    union_string
  end
end

.nil_type?(type_obj) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sorbet_baml/type_mapper.rb', line 102

def self.nil_type?(type_obj)
  type_obj.is_a?(T::Types::Simple) && type_obj.raw_type == NilClass || false
end