87 lines
3.1 KiB
Ruby
87 lines
3.1 KiB
Ruby
require "boot/boot_class"
|
|
#require "vm/call_site"
|
|
require "kernel/all"
|
|
require "boot/object"
|
|
require "boot/string"
|
|
|
|
module Boot
|
|
# The BootSpace contains all objects for a program. In functional terms it is a program, but in oo
|
|
# it is a collection of objects, some of which are data, some classes, some functions
|
|
|
|
# The main entry is a function called (of all things) "main", This _must be supplied by the compling
|
|
# There is a start and exit block that call main, which receives an array of strings
|
|
|
|
# While data ususally would live in a .data section, we may also "inline" it into the code
|
|
# in an oo system all data is represented as objects
|
|
|
|
class BootSpace
|
|
|
|
# Initialize with a string for cpu. Naming conventions are: for Machine XXX there exists a module XXX
|
|
# with a XXXMachine in it that derives from Virtual::RegisterMachine
|
|
def initialize machine = nil
|
|
super()
|
|
@classes = {}
|
|
@main = Virtual::MethodDefinition.new("main" , [] )
|
|
#global objects (data)
|
|
@objects = []
|
|
boot_classes
|
|
@passes = [ ]
|
|
end
|
|
attr_reader :context , :main , :classes , :entry , :exit
|
|
|
|
def run_passes
|
|
@passes.each do |pass|
|
|
all = main.blocks
|
|
@classes.each_value do |c|
|
|
c.functions.each {|f| all += f.blocks }
|
|
end
|
|
all.each do |block|
|
|
pass.run(block)
|
|
end
|
|
end
|
|
end
|
|
|
|
# boot the classes, ie create a minimal set of classes with a minimal set of functions
|
|
# minimal means only that which can not be coded in ruby
|
|
# MethodDefinitions are grabbed from respective modules by sending the method name. This should return the
|
|
# implementation of the method (ie a method object), not actually try to implement it (as that's impossible in ruby)
|
|
def boot_classes
|
|
# very fiddly chicken 'n egg problem. Functions need to be in the right order, and in fact we have to define some
|
|
# dummies, just for the other to compile
|
|
obj = get_or_create_class :Object
|
|
[:index_of , :_get_instance_variable , :_set_instance_variable].each do |f|
|
|
#puts "Boot Object::#{f}"
|
|
obj.add_method_definition Boot::Object.send(f , @context)
|
|
end
|
|
[:putstring,:putint,:fibo,:exit].each do |f|
|
|
#puts "Boot Kernel::#{f}"
|
|
obj.add_method_definition Crystal::Kernel.send(f , @context)
|
|
end
|
|
obj = get_or_create_class :String
|
|
[:get , :set].each do |f|
|
|
#puts "Boot String::#{f}"
|
|
obj.add_method_definition Boot::String.send(f , @context)
|
|
end
|
|
end
|
|
|
|
# Objects are data and get assembled after functions
|
|
def add_object o
|
|
return if @objects.include? o
|
|
# raise "must be derived from Code #{o.inspect}" unless o.is_a? Virtual::Code
|
|
@objects << o # TODO check type , no basic values allowed (must be wrapped)
|
|
end
|
|
|
|
# this is the way to instantiate classes (not BootClass.new)
|
|
# so we get and keep exactly one per name
|
|
def get_or_create_class name
|
|
raise "uups #{name}.#{name.class}" unless name.is_a? Symbol
|
|
c = @classes[name]
|
|
unless c
|
|
c = BootClass.new(name)
|
|
@classes[name] = c
|
|
end
|
|
c
|
|
end
|
|
end
|
|
end
|