Class: RustyJson::RustStruct

Inherits:
Object
  • Object
show all
Defined in:
lib/rusty_json/rust_struct.rb

Overview

RustyJson:L:RustStruct is the object that will be translated into a Rust struct.

Constant Summary collapse

@@types = 
{
  String => 'String',
  Fixnum => 'i64',
  Float => 'f64',
  TrueClass => 'bool',
  FalseClass => 'bool',
  Array => 'Vec',
  NilClass => 'Option<?>'
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, root = false) ⇒ RustStruct

Root is used so that we can reset child structs when the to_s is finished

Parameters:

  • name (String) —

    the name of the returned struct

  • root (Boolean) (defaults to: false) —

    is this the root struct



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# File 'lib/rusty_json/rust_struct.rb', line 28

def initialize(name, root = false)
  @root = root
  @printed = false
  @name = name
  @values = {}
  @structs = Set.new
end

Instance Attribute Details

#name ⇒ String

Returns name of the struct.

Returns:

  • (String) —

    name of the struct



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# File 'lib/rusty_json/rust_struct.rb', line 12

class RustStruct
  attr_reader :name, :values, :root

  @@types = {
    String => 'String',
    Fixnum => 'i64',
    Float => 'f64',
    TrueClass => 'bool',
    FalseClass => 'bool',
    Array => 'Vec',
    NilClass => 'Option<?>'
  }
  # @param name [String] the name of the returned struct
  # @param root [Boolean] is this the root struct
  #
  # Root is used so that we can reset child structs when the to_s is finished
  def initialize(name, root = false)
    @root = root
    @printed = false
    @name = name
    @values = {}
    @structs = Set.new
  end

  # reset must be called to print the struct again, as we don't want to
  # repeatedly print the same struct when it occurs recursively in the
  # input JSON
  def reset
    @printed = false
    @structs.each(&:reset)
  end

  # Add Value is how we add keys to the resulting Struct
  # We need a name and a type, and potentially a subtype
  #
  # For example:
  # types could be String, Fixnum, or Array
  # If the tyoe is Array, then we need the subtype of the array,
  # is it an array of integers or strings?
  #
  # @param name [String] what is this key in the struct
  # @param type [Class] What typs are we
  # @param subtype [Class] What typs are we
  #
  # @return true

  def add_value(name, type, subtype = nil)
    if type.class == RustyJson::RustStruct || subtype.class == RustyJson::RustStruct
      if type.class == RustyJson::RustStruct
        t = type
        type = type.name
        struct = t
      elsif subtype.class == RustyJson::RustStruct
        s = subtype
        subtype = subtype.name
        struct = s
      end
      @structs << struct
      RustStruct.add_type(struct.name, struct.name)
    end
    @values[name] = [type, subtype]
    true
  end

  # two Rust structs are equal if all of their keys / value types are the same
  def ==(other)
    values == other.values
  end

  # to_s controlls how to display the RustStruct as a Rust Struct
  def to_s
    return '' if @printed
    @printed = true
    struct = required_structs
    members = @values.map do |key, value|
      type = RustStruct.type_name(value[0])
      subtype = RustStruct.type_name(value[1])
      member = "    #{key}: #{type}"
      member << "<#{subtype}>" unless value[1].nil?
      member
    end
    struct << "struct #{@name} {\n" + members.join(",\n") + ",\n}\n\n"
    struct = struct.gsub("\n\n\n", "\n\n")
    reset if @root
    struct
  end

  private

  def required_structs
    s = @structs.map(&:to_s).join("\n")
    return "" if s == "\n"
    s
  end

  def self.add_type(name, value)
    @@types[name] = value
  end

  def self.type_name(type)
    @@types[type]
  end
end

#root ⇒ Object

Returns is this the root level JSON object?.

Returns:

  • is this the root level JSON object?



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# File 'lib/rusty_json/rust_struct.rb', line 12

class RustStruct
  attr_reader :name, :values, :root

  @@types = {
    String => 'String',
    Fixnum => 'i64',
    Float => 'f64',
    TrueClass => 'bool',
    FalseClass => 'bool',
    Array => 'Vec',
    NilClass => 'Option<?>'
  }
  # @param name [String] the name of the returned struct
  # @param root [Boolean] is this the root struct
  #
  # Root is used so that we can reset child structs when the to_s is finished
  def initialize(name, root = false)
    @root = root
    @printed = false
    @name = name
    @values = {}
    @structs = Set.new
  end

  # reset must be called to print the struct again, as we don't want to
  # repeatedly print the same struct when it occurs recursively in the
  # input JSON
  def reset
    @printed = false
    @structs.each(&:reset)
  end

  # Add Value is how we add keys to the resulting Struct
  # We need a name and a type, and potentially a subtype
  #
  # For example:
  # types could be String, Fixnum, or Array
  # If the tyoe is Array, then we need the subtype of the array,
  # is it an array of integers or strings?
  #
  # @param name [String] what is this key in the struct
  # @param type [Class] What typs are we
  # @param subtype [Class] What typs are we
  #
  # @return true

  def add_value(name, type, subtype = nil)
    if type.class == RustyJson::RustStruct || subtype.class == RustyJson::RustStruct
      if type.class == RustyJson::RustStruct
        t = type
        type = type.name
        struct = t
      elsif subtype.class == RustyJson::RustStruct
        s = subtype
        subtype = subtype.name
        struct = s
      end
      @structs << struct
      RustStruct.add_type(struct.name, struct.name)
    end
    @values[name] = [type, subtype]
    true
  end

  # two Rust structs are equal if all of their keys / value types are the same
  def ==(other)
    values == other.values
  end

  # to_s controlls how to display the RustStruct as a Rust Struct
  def to_s
    return '' if @printed
    @printed = true
    struct = required_structs
    members = @values.map do |key, value|
      type = RustStruct.type_name(value[0])
      subtype = RustStruct.type_name(value[1])
      member = "    #{key}: #{type}"
      member << "<#{subtype}>" unless value[1].nil?
      member
    end
    struct << "struct #{@name} {\n" + members.join(",\n") + ",\n}\n\n"
    struct = struct.gsub("\n\n\n", "\n\n")
    reset if @root
    struct
  end

  private

  def required_structs
    s = @structs.map(&:to_s).join("\n")
    return "" if s == "\n"
    s
  end

  def self.add_type(name, value)
    @@types[name] = value
  end

  def self.type_name(type)
    @@types[type]
  end
end

#values ⇒ Hash

Returns sub objects in the struct.

Returns:

  • (Hash) —

    sub objects in the struct



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# File 'lib/rusty_json/rust_struct.rb', line 12

class RustStruct
  attr_reader :name, :values, :root

  @@types = {
    String => 'String',
    Fixnum => 'i64',
    Float => 'f64',
    TrueClass => 'bool',
    FalseClass => 'bool',
    Array => 'Vec',
    NilClass => 'Option<?>'
  }
  # @param name [String] the name of the returned struct
  # @param root [Boolean] is this the root struct
  #
  # Root is used so that we can reset child structs when the to_s is finished
  def initialize(name, root = false)
    @root = root
    @printed = false
    @name = name
    @values = {}
    @structs = Set.new
  end

  # reset must be called to print the struct again, as we don't want to
  # repeatedly print the same struct when it occurs recursively in the
  # input JSON
  def reset
    @printed = false
    @structs.each(&:reset)
  end

  # Add Value is how we add keys to the resulting Struct
  # We need a name and a type, and potentially a subtype
  #
  # For example:
  # types could be String, Fixnum, or Array
  # If the tyoe is Array, then we need the subtype of the array,
  # is it an array of integers or strings?
  #
  # @param name [String] what is this key in the struct
  # @param type [Class] What typs are we
  # @param subtype [Class] What typs are we
  #
  # @return true

  def add_value(name, type, subtype = nil)
    if type.class == RustyJson::RustStruct || subtype.class == RustyJson::RustStruct
      if type.class == RustyJson::RustStruct
        t = type
        type = type.name
        struct = t
      elsif subtype.class == RustyJson::RustStruct
        s = subtype
        subtype = subtype.name
        struct = s
      end
      @structs << struct
      RustStruct.add_type(struct.name, struct.name)
    end
    @values[name] = [type, subtype]
    true
  end

  # two Rust structs are equal if all of their keys / value types are the same
  def ==(other)
    values == other.values
  end

  # to_s controlls how to display the RustStruct as a Rust Struct
  def to_s
    return '' if @printed
    @printed = true
    struct = required_structs
    members = @values.map do |key, value|
      type = RustStruct.type_name(value[0])
      subtype = RustStruct.type_name(value[1])
      member = "    #{key}: #{type}"
      member << "<#{subtype}>" unless value[1].nil?
      member
    end
    struct << "struct #{@name} {\n" + members.join(",\n") + ",\n}\n\n"
    struct = struct.gsub("\n\n\n", "\n\n")
    reset if @root
    struct
  end

  private

  def required_structs
    s = @structs.map(&:to_s).join("\n")
    return "" if s == "\n"
    s
  end

  def self.add_type(name, value)
    @@types[name] = value
  end

  def self.type_name(type)
    @@types[type]
  end
end

Instance Method Details

#==(other) ⇒ Object

two Rust structs are equal if all of their keys / value types are the same



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# File 'lib/rusty_json/rust_struct.rb', line 77

def ==(other)
  values == other.values
end

#add_value(name, type, subtype = nil) ⇒ Object

Add Value is how we add keys to the resulting Struct We need a name and a type, and potentially a subtype

For example: types could be String, Fixnum, or Array If the tyoe is Array, then we need the subtype of the array, is it an array of integers or strings?

Parameters:

  • name (String) —

    what is this key in the struct

  • type (Class) —

    What typs are we

  • subtype (Class) (defaults to: nil) —

    What typs are we

Returns:

  • true



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# File 'lib/rusty_json/rust_struct.rb', line 58

def add_value(name, type, subtype = nil)
  if type.class == RustyJson::RustStruct || subtype.class == RustyJson::RustStruct
    if type.class == RustyJson::RustStruct
      t = type
      type = type.name
      struct = t
    elsif subtype.class == RustyJson::RustStruct
      s = subtype
      subtype = subtype.name
      struct = s
    end
    @structs << struct
    RustStruct.add_type(struct.name, struct.name)
  end
  @values[name] = [type, subtype]
  true
end

#reset ⇒ Object

reset must be called to print the struct again, as we don’t want to repeatedly print the same struct when it occurs recursively in the input JSON



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# File 'lib/rusty_json/rust_struct.rb', line 39

def reset
  @printed = false
  @structs.each(&:reset)
end

#to_s ⇒ Object

to_s controlls how to display the RustStruct as a Rust Struct



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# File 'lib/rusty_json/rust_struct.rb', line 82

def to_s
  return '' if @printed
  @printed = true
  struct = required_structs
  members = @values.map do |key, value|
    type = RustStruct.type_name(value[0])
    subtype = RustStruct.type_name(value[1])
    member = "    #{key}: #{type}"
    member << "<#{subtype}>" unless value[1].nil?
    member
  end
  struct << "struct #{@name} {\n" + members.join(",\n") + ",\n}\n\n"
  struct = struct.gsub("\n\n\n", "\n\n")
  reset if @root
  struct
end