42 lines
1.0 KiB
Ruby
42 lines
1.0 KiB
Ruby
# collection of the simple ones, int and strings and such
|
|
|
|
module Ast
|
|
|
|
class IntegerExpression < Expression
|
|
# attr_reader :value
|
|
def compile context
|
|
Vm::IntegerConstant.new value
|
|
end
|
|
end
|
|
|
|
class NameExpression < Expression
|
|
# attr_reader :name
|
|
|
|
# compiling a variable resolves it. if it wasn't defined, raise an exception
|
|
def compile context
|
|
raise "Undefined variable #{name}, defined locals #{context.locals.keys.join('-')}" unless context.locals.has_key?(name)
|
|
context.locals[name]
|
|
end
|
|
end
|
|
|
|
class ModuleName < NameExpression
|
|
|
|
def compile context
|
|
clazz = context.object_space.get_or_create_class name
|
|
raise "uups #{clazz}.#{name}" unless clazz
|
|
#class qualifier, means call from metaclass
|
|
clazz = clazz.meta_class
|
|
puts "CLAZZ #{clazz}"
|
|
clazz
|
|
end
|
|
end
|
|
|
|
class StringExpression < Expression
|
|
# attr_reader :string
|
|
def compile context
|
|
value = Vm::StringConstant.new(string)
|
|
context.object_space.add_object value
|
|
value
|
|
end
|
|
end
|
|
end |