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Copy pathopcode.py
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295 lines (209 loc) · 7.25 KB
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class OpCode(object):
"""
represent an operation code in the vm
"""
pass
class Declaration(OpCode):
"""
A declaration contains bytecode that should be interpreted and
then assigned to the name of the declaration
"""
def __init__(self, name, bytecode):
self.name = name
self.bytecode = bytecode
def __repr__(self):
return "Declaration(%r , %r)" % (self.name, self.bytecode)
def __eq__(self, other):
return (
isinstance(other, Declaration) and
other.name == self.name and
other.bytecode == self.bytecode
)
class Apply(OpCode):
"""
Calls the top of the stack:
if it is a native function it calls it by applying the next item on the stack
if it is a bytecode it calls it and let it handle the stack
"""
def __repr__(self):
return "Apply()"
def __eq__(self, other):
return isinstance(other, Apply)
class Pop(OpCode):
"""
Throws away the top of the stack
"""
def __repr__(self):
return "Pop()"
def __eq__(self, other):
return isinstance(other, Pop)
class LoadConstant(OpCode):
"""
Loads constant from the constants area.
"""
def __init__(self, index):
self.index = index
def __eq__(self, other):
return isinstance(other, LoadConstant) and other.index == self.index
def __repr__(self):
return "LoadConstant(%s)" % self.index
class LoadLocal(OpCode):
"""
Loads value from current scope (frame)
"""
def __init__(self, name):
self.name = name
def __eq__(self, other):
return isinstance(other, LoadLocal) and other.name == self.name
def __repr__(self):
return "LoadLocal(%r)" % self.name
class AccessField(OpCode):
"""
Replaces the top of the stack with the field from the record currently at the top of the stack
"""
def __init__(self, name):
self.name = name
def __eq__(self, other):
return isinstance(other, AccessField) and other.name == self.name
def __repr__(self):
return "AccessField(%r)" % self.name
class AssignField(OpCode):
"""
TODO: replace with immutable operation
Assign the top of the stack value to the field of stack +1 that needs to be a record
"""
def __init__(self, name):
self.name = name
def __eq__(self, other):
return isinstance(other, AssignField) and other.name == self.name
def __repr__(self):
return "AssignField(%r)" % self.name
class LoadExternal(OpCode):
"""
Asks the interpreter to load and interpret `module`, and then grabs `name` from its scope
"""
def __init__(self, module, name):
self.module = module
self.name = name
def __eq__(self, other):
return (
isinstance(other, LoadExternal)
and other.module == self.module
and other.name == self.name
)
def __repr__(self):
return "LoadExternal(%s, %s)" % (
self.module.__repr__(),
self.name.__repr__()
)
class StoreLocal(OpCode):
def __init__(self, name):
self.name = name
def __eq__(self, other):
return isinstance(other, StoreLocal) and other.name == self.name
def __repr__(self):
return "StoreLocal(%s)" % self.name.__repr__()
class Lambda(OpCode):
def __init__(self, bytecode):
self.bytecode = bytecode
def __eq__(self, other):
return isinstance(other, Lambda) and other.bytecode == self.bytecode
def __repr__(self):
return "Lambda(%s)" % self.bytecode.__repr__()
class NativeCall(OpCode):
def __init__(self, native, number_of_args):
self.native = native
self.number_of_args = number_of_args
def __repr__(self):
return "NativeCall(%r, %r)" % (self.native.__name__, self.number_of_args)
def __eq__(self, other):
return (
isinstance(other, NativeCall) and
other.native == self.native and
other.number_of_args == self.number_of_args
)
class JumpAbsoluteIfNotEqual(OpCode):
def __init__(self, address):
self.address = address
def __eq__(self, other):
return isinstance(other, JumpAbsoluteIfNotEqual) and other.address == self.address
def __repr__(self):
return "JumpAbsoluteIfNotEqual(%s)" % self.address
class GuardValue(OpCode):
def __init__(self, value, address):
self.value = value
self.address = address
def __eq__(self, other):
return (
isinstance(other, GuardValue) and
other.value == self.value and
other.address == self.address
)
def __repr__(self):
return "GuardValue(%s, %s)" % (self.value.__repr__(), self.address)
class GuardConstructor(OpCode):
"""
Checks that the top of the stack is a data object with matching constructor name, otherwise puts it back and jumps
if it matches it splices the members onto the stack in reverse order, with the first member at the top of the stack
"""
def __init__(self, name, address):
self.name = name
self.address = address
def __eq__(self, other):
return (
isinstance(other, GuardConstructor) and
other.name == self.name and
other.address == self.address
)
def __repr__(self):
return "GuardConstructor(%s, %s)" % (self.name.__repr__(), self.address)
class GuardArray(OpCode):
"""
Checks that the top of the stack is an array with matching length, otherwise puts it back and jumps
if it matches it splices the array onto the stack in reverse order, with the first member at the top of the stack
"""
def __init__(self, lenght, address):
self.lenght = lenght
self.address = address
def __eq__(self, other):
return (
isinstance(other, GuardArray) and
other.lenght == self.lenght and
other.address == self.address
)
def __repr__(self):
return "GuardArray(%s, %s)" % (self.lenght.__repr__(), self.address)
class JumpAbsolute(OpCode):
def __init__(self, address):
self.address = address
def __eq__(self, other):
return isinstance(other, JumpAbsolute) and other.address == self.address
def __repr__(self):
return "JumpAbsolute(%s)" % self.address
class MakeData(OpCode):
def __init__(self, name, length):
self.length = length
self.name = name
def __eq__(self, other):
return (
isinstance(other, MakeData) and
other.name == self.name and
other.length == self.length
)
def __repr__(self):
return "MakeData(%s, %s)" % (self.name.__repr__(), self.length)
class Stash(OpCode):
def __repr__(self):
return "Stash()"
def __eq__(self, other):
return isinstance(other, Stash)
class RestoreStash(OpCode):
def __repr__(self):
return "RestoreStash()"
def __eq__(self, other):
return isinstance(other, RestoreStash)
class DropStash(OpCode):
def __repr__(self):
return "DropStash()"
def __eq__(self, other):
return isinstance(other, DropStash)