Class: SorobanRustBackend::CodeGenerator

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

Instance Method Summary collapse

Constructor Details

#initialize(instructions, base_indentation: 0, user_defined_types: [], function_names: []) ⇒ CodeGenerator

Returns a new instance of CodeGenerator.



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# File 'lib/code_generator.rb', line 3

def initialize(instructions, base_indentation: 0, user_defined_types: [], function_names: [])
  @instructions = instructions
  @base_indentation = base_indentation
  @user_defined_types = user_defined_types
  @function_names = function_names

  silviculturist = SorobanRustBackend::Silviculturist.new(instructions, base_indentation:)
  silviculturist.make_forrest

  @forrest = silviculturist.forrest
end

Instance Method Details

#generate ⇒ Object 



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# File 'lib/code_generator.rb', line 15

def generate
  return_string = ''

  @forrest
    .code_generator_traverse do |y|
    y = y.compact

    og_instruction = y[0]
    instruction = handle_metadata(y[0], y[2])
    indentation = og_instruction.instruction == 'goto' ? y[2][:return_scope] + @base_indentation : y[1]

    return_string << "#{'    ' * indentation}#{InstructionHandler.new(instruction, y[2]).generate_rust}\n"

    if (instruction.instruction == 'exit_with_message' || instruction.instruction == 'return' || instruction.instruction == 'goto') && instruction.scope != 0
      jump_back_indent = indentation - 1
      return_string << "#{'    ' * jump_back_indent}}\n"
    end
  end

  return_string
end

#handle_metadata(instruction, metadata) ⇒ Object 



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# File 'lib/code_generator.rb', line 37

def handle_metadata(instruction, metadata)
  if instruction.instruction == 'goto'
    DTRCore::Instruction.new(
      'jump',
      [metadata[:return_scope]],
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  elsif match_statement?(instruction, metadata)
    DTRCore::Instruction.new(
      'jump',
      instruction.inputs + ['ELSE_IF_BRANCH'],
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  elsif if_let?(instruction, metadata)
    let_statement = "let #{metadata[:try_assign][:lhs]} = #{metadata[:try_assign][:rhs]}"
    DTRCore::Instruction.new(
      'jump',
      [let_statement, instruction.inputs[1]],
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  elsif while_loop?(instruction, metadata)
    operator_variable = (metadata[:end_of_iteration_check][:lhs]).to_s
    iterator_variable = (metadata[:end_of_iteration_check][:rhs]).to_s

    DTRCore::Instruction.new(
      'jump',
      [operator_variable, iterator_variable, instruction.inputs[1], 'WHILE_LOOP'],
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  elsif udt?(instruction)
    inputs = instruction.inputs
    udt_found = nil

    @user_defined_types.each do |udt|
      fixed_udt_name = udt_name_fix(udt)

      next unless fixed_udt_name == inputs[1] || (fixed_udt_name == inputs[2] && inputs[0] == '&')

      udt_found = if inputs.last.instance_of?(DTRCore::UserDefinedType)
                    inputs.last
                  else

                    inputs.push(udt)
                  end
      break
    end

    raise "Unable to instantiate unrecognized UDT: #{inputs[1]}" if udt_found.nil?

    DTRCore::Instruction.new(
      'instantiate_object',
      inputs,
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  elsif instruction.instruction == 'evaluate'
    method_name = instruction.inputs[0]

    method_name = "Self::#{method_name}" if @function_names.include?(method_name)

    DTRCore::Instruction.new(
      'evaluate',
      [method_name] + instruction.inputs[1..],
      instruction.assign,
      instruction.scope,
      instruction.id
    )
  else
    instruction
  end
end

#if_let?(instruction, metadata) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/code_generator.rb', line 130

def if_let?(instruction, metadata)
  instruction.instruction == 'jump' &&
    metadata[:try_assign] &&
    metadata[:try_assign][:assign] == instruction.inputs[0] &&
    metadata[:parent_scope] == instruction.scope
end

#match_statement?(instruction, metadata) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/code_generator.rb', line 126

def match_statement?(instruction, metadata)
  metadata[:last_node_was_conditional_jump] && instruction.instruction == 'jump' && metadata[:parent_scope] && metadata[:parent_scope] == instruction.scope
end

#udt?(instruction) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/code_generator.rb', line 144

def udt?(instruction)
  instruction.instruction == 'instantiate_object' && (instruction.inputs[0] == 'UDT' || (instruction.inputs[0] == '&' && instruction.inputs[1] == 'UDT'))
end

#udt_name_fix(udt) ⇒ Object 



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# File 'lib/code_generator.rb', line 118

def udt_name_fix(udt)
  if udt.name.end_with?('_STRUCT') || udt.name.end_with?('_ENUM')
    udt.name.split('_')[0..-2].join('_')
  else
    udt.name
  end
end

#while_loop?(instruction, metadata) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/code_generator.rb', line 137

def while_loop?(instruction, metadata)
  instruction.instruction == 'jump' &&
    metadata[:end_of_iteration_check] &&
    metadata[:end_of_iteration_check][:assign] == instruction.inputs[0] &&
    metadata[:parent_scope] == instruction.scope
end