58 lines
1.1 KiB
Ruby
58 lines
1.1 KiB
Ruby
# collection of the simple ones, int and strings and such
|
|
|
|
module Ast
|
|
|
|
class IntegerExpression < Expression
|
|
attr_reader :value
|
|
def initialize val
|
|
@value = val
|
|
end
|
|
def inspect
|
|
self.class.name + ".new(" + value.to_s+ ")"
|
|
end
|
|
def compile context
|
|
Vm::Signed.new value
|
|
end
|
|
def attributes
|
|
[:value]
|
|
end
|
|
end
|
|
|
|
class NameExpression < Expression
|
|
attr_reader :name
|
|
def initialize name
|
|
@name = name
|
|
end
|
|
def compile context
|
|
variable = Vm::Variable.new(@name)
|
|
context.locals[@name] = variable
|
|
variable
|
|
end
|
|
def inspect
|
|
self.class.name + '.new("' + name + '")'
|
|
end
|
|
def attributes
|
|
[:name]
|
|
end
|
|
end
|
|
|
|
class StringExpression < Expression
|
|
attr_reader :string
|
|
def initialize str
|
|
@string = str
|
|
end
|
|
def inspect
|
|
self.class.name + '.new("' + string + '")'
|
|
end
|
|
|
|
def compile context
|
|
value = Vm::StringLiteral.new(string)
|
|
context.program.add_object value
|
|
value
|
|
end
|
|
def attributes
|
|
[:string]
|
|
end
|
|
end
|
|
|
|
end |