def codegen(self, c):
mainclass, *classes = self.children
c.setLine(1)
#codegen classes
for cls in classes:
cls.codegen(c)
#make main function
main = CodeGen(c.filename, 'main')
main.setFlags(Flags.NEWLOCALS | Flags.OPTIMIZED)
mainclass.codegen(main)
c.LOAD_CONST(main)
c.MAKE_FUNCTION()
c.STORE_NAME('main')
#ifmain
c.LOAD_NAME('__name__')
c.LOAD_CONST('__main__')
c.COMPARE_OP(CmpOp.EQUAL)
dest = c.POP_JUMP_IF_FALSE()
c.LOAD_NAME('main')
c.CALL_FUNCTION()
c.POP_TOP()
#module return
dest()
c.LOAD_CONST(None)
c.RETURN_VALUE()
def genMethod(method, methodname):
func = CodeGen(cls.filename, methodname)
func.setFlags(Flags.NEWLOCALS | Flags.OPTIMIZED)
func.argcount = len(method.formallist) + 1
func.varnames = ['self'] + list(map(lambda formal: formal.ID, method.formallist))
method.codegen(func)
cls.LOAD_CONST(func)
cls.MAKE_FUNCTION()
cls.STORE_NAME(methodname)
def codegen(self, c):
for method in self.children:
methodname = '{0}__{1}'.format(self.name, method.ID)
func = CodeGen(c.filename, methodname)
func.setFlags(Flags.NEWLOCALS | Flags.OPTIMIZED)
func.argcount = len(method.formallist)+1
func.varnames = ['self'] + list(map(lambda formal: formal.ID, method.formallist))
method.codegen(func)
c.LOAD_CONST(func)
c.MAKE_FUNCTION()
c.STORE_NAME(methodname)
def codegen(path, tree, dumpbin=False):
module = CodeGen(path, "<module>")
tree.codegen(module)
co = module.code()
with open(path, "wb") as fout:
# magic header
fout.write(imp.get_magic())
# timestamp
fout.write(struct.pack("I", int(time.time())))
# code object
marshal.dump(co, fout)
if dumpbin:
dump(co)
def codegen(self, c):
c.LOAD_BUILD_CLASS()
cls = CodeGen(c.filename, self.name)
cls.setFlags(Flags.NEWLOCALS)
cls.argcount = 1
cls.setLine(1)
cls.LOAD_FAST('__locals__')
cls.STORE_LOCALS()
cls.LOAD_NAME('__name__')
cls.STORE_NAME('__module__')
#define constructor to initialize class variables
init = CodeGen(cls.filename, '__init__')
init.setFlags(Flags.NEWLOCALS | Flags.OPTIMIZED)
init.argcount = 1
init.varnames = ['self']
if self.parent:
init.LOAD_GLOBAL(self.parent)
init.LOAD_ATTR('__init__')
init.LOAD_FAST('self')
init.CALL_FUNCTION(1)
init.POP_TOP()
for var in self.classvars:
vartype = var.typename
if vartype == ast.IntType:
init.LOAD_CONST(0)
elif vartype == ast.BoolType:
init.LOAD_CONST(False)
else:
init.LOAD_CONST(None)
init.LOAD_FAST('self')
init.STORE_ATTR('_' + var.ID)
init.LOAD_CONST(None)
init.RETURN_VALUE()
cls.LOAD_CONST(init)
cls.MAKE_FUNCTION()
cls.STORE_NAME('__init__')
#generate methods
def genMethod(method, methodname):
func = CodeGen(cls.filename, methodname)
func.setFlags(Flags.NEWLOCALS | Flags.OPTIMIZED)
func.argcount = len(method.formallist) + 1
func.varnames = ['self'] + list(map(lambda formal: formal.ID, method.formallist))
method.codegen(func)
cls.LOAD_CONST(func)
cls.MAKE_FUNCTION()
cls.STORE_NAME(methodname)
for method in self.children:
genMethod(method, method.ID)
if method.ID == 'toString':
genMethod(method, '__str__')
cls.LOAD_CONST(None)
cls.RETURN_VALUE()
c.LOAD_CONST(cls)
c.MAKE_FUNCTION()
c.LOAD_CONST(self.name)
if self.parent:
c.LOAD_GLOBAL(self.parent)
c.CALL_FUNCTION(3)
else:
c.CALL_FUNCTION(2)
c.STORE_NAME(self.name)
