Class: BiteScript::MethodBuilder

Inherits:
Object
  • Object
show all
Includes:
ASM, Annotatable, Bytecode, QuickTypes
Defined in:
lib/bitescript/builder.rb

Constant Summary

Constants included from Bytecode

Bytecode::JDobule, Bytecode::JFloat, Bytecode::JInteger, Bytecode::JLong, Bytecode::JObject, Bytecode::JPrintStream, Bytecode::JSystem, Bytecode::JVoid, Bytecode::OpcodeInstructions, Bytecode::OpcodeStackDeltas

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Bytecode

#aprintln, #label, #labels, #line, #println, #push_int, #start, #stop, #swap2, #sym_to_label, #trycatch

Methods included from Signature

ci, class_id, classname, path, sig, signature

Methods included from Annotatable

#annotate

Methods included from QuickTypes

#boolean, #byte, #char, #double, #float, #int, #long, #null, #object, #short, #string, #void

Constructor Details

#initialize(class_builder, modifiers, name, exceptions, signature) ⇒ MethodBuilder

Returns a new instance of MethodBuilder.



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# File 'lib/bitescript/builder.rb', line 424

def initialize(class_builder, modifiers, name, exceptions, signature)
  @class_builder = class_builder
  @modifiers = modifiers
  @name = name
  @signature = signature
  
  @method_visitor = class_builder.new_method(modifiers, name, signature, exceptions)
  
  @locals = {}
  @next_local = 0
  
  @static = (modifiers & Opcodes::ACC_STATIC) != 0
  @start_label = labels[:start] = self.label
  @end_label = labels[:end] = self.label
  @exceptions = exceptions || []
end

Instance Attribute Details

#class_builder ⇒ Object (readonly)

Returns the value of attribute class_builder.



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# File 'lib/bitescript/builder.rb', line 422

def class_builder
  @class_builder
end

#method_visitor ⇒ Object (readonly)

Returns the value of attribute method_visitor.



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# File 'lib/bitescript/builder.rb', line 417

def method_visitor
  @method_visitor
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/bitescript/builder.rb', line 421

def name
  @name
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/bitescript/builder.rb', line 420

def signature
  @signature
end

#static ⇒ Object (readonly) Also known as: static?

Returns the value of attribute static.



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# File 'lib/bitescript/builder.rb', line 418

def static
  @static
end

Class Method Details

.build(class_builder, modifiers, name, signature, &block) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 453

def self.build(class_builder, modifiers, name, signature, &block)
  mb = MethodBuilder.new(class_builder, modifiers, name, signature)
  mb.start
  if block.arity == 1
    block.call(mb)
  else
    mb.instance_eval(&block)
  end
  mb.stop
end

.build2(class_builder, modifiers, name, signature, &block) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 464

def self.build2(class_builder, modifiers, name, signature, &block)
  mb = MethodBuilder.new(class_builder, modifiers, name, signature)
  mb.start
  block.call(mb)
  mb.stop
end

Instance Method Details

#declaring_class ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 449

def declaring_class
  @class_builder
end

#generate(&block) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 471

def generate(&block)
  start
  block.call(self)
  stop
end

#local(name, type = nil) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 481

def local(name, type=nil)
  if name == "this" && @static
    raise "'this' attempted to load from static method"
  end
  
  if @locals[name]
    return @locals[name][-1][0]
  else
    raise ArgumentError, 'Local type required' unless type
    return push_local(name, type, @start_label)
  end
end

#local_debug_info(name, local, end_label = nil) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 516

def local_debug_info(name, local, end_label=nil)
  return unless local
  index, big, type, start = local
  end_label ||= self.label.set!
  method_visitor.visit_local_variable(name, type, nil,
                                      start.label,
                                      end_label.label,
                                      index)
end

#parameter_types ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 441

def parameter_types
  signature[1..-1]
end

#pop_local(name) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 526

def pop_local(name)
  here = self.label.set!
  local_debug_info(name, @locals[name].pop, here)
  @locals[name][-1][-1] = here if @locals[name].size > 0
end

#push_local(name, type, start = nil) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 494

def push_local(name, type, start=nil)
  start ||= self.label.set!
  type = ci(type)
  big = "JD".include? type
  match = @locals[name].find {|local| !big || local[1]} if @locals[name]
  if match
    index = match[0]
  else
    index = @next_local
    @next_local += 1
    @next_local += 1 if big
  end
  
  if @locals[name] && @locals[name].size > 0
    local_debug_info(name, @locals[name][-1])
  else
    @locals[name] = []
  end
  @locals[name] << [index, big, type, start]
  index
end

#return_type ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 445

def return_type
  signature[0]
end

#this ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 477

def this
  @class_builder
end

#visit_annotation(*args) ⇒ Object 



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# File 'lib/bitescript/builder.rb', line 532

def visit_annotation(*args)
  @method_visitor.visit_annotation(*args)
end