def compile_statements(self):
local_root = SyntaxTreeNode('statements')
local_root.add_many(lambda: or_compile((
self.compile_do,
self.compile_let,
self.compile_while,
self.compile_return,
self.compile_if,
)))
return local_root
def compile_subroutine_body(self):
# subroutineBody
# '{' varDec* statements '}'
local_root = SyntaxTreeNode('subroutineBody')
# '{'
node = self.__expect_symbol('{')
if not node:
return None
local_root.add_child(node)
# varDesc*
local_root.add_many(self.compile_var_dec)
# statements
local_root.add_child(self.compile_statements(), 'expect statements')
# '}'
local_root.add_child(self.__expect_symbol('}'), 'expect }')
return local_root
def compile_class(self):
# class: 'class' className '{' classVarDec* subroutineDec* '}'
local_root = SyntaxTreeNode('class')
# 'class'
local_root.add_child(self.__expect_keyword('class'), 'expect keyword class')
# className
class_name_node = self.__expect_identifier()
local_root.add_child(class_name_node, 'expect identifier className')
self.class_name = class_name_node.value
# '{'
local_root.add_child(self.__expect_symbol('{'), 'expect {')
# classVarDec*
local_root.add_many(self.compile_class_var_dec)
# subroutineDec*
local_root.add_many(self.compile_subroutine)
# '}'
local_root.add_child(self.__expect_symbol('}'), 'expect } in class')
return local_root