def insert(self, record):
self.record = record
self.cur_context_attributes.context_lexemes.append(self.record.lexeme)
self.record.offset = self.cur_offset
self.cur_offset += self.record.size
self.existing_entry = self.find(self.record.lexeme)
if self.existing_entry is None:
self.new_entry = SemanticEntry()
# self.record.depth = 0
self.new_entry.put(self.record)
self.sym_table[self.record.lexeme] = self.new_entry
else:
self.record.depth = self.existing_entry.depth
self.existing_entry.put(self.record)
class SymbolTable(object):
def __init__(self, parent):
self.parent_table = parent
self.name = ''
if parent:
self.cur_depth = self.parent_table.cur_depth
else:
self.cur_depth = 0
self.context_attributes_stack = []
self.cur_context_attributes = None
self.sym_table = OrderedDict()
self.record = SemanticRecord()
self.cur_offset = 0
def create(self): #subtables
self.cur_context_attributes = ContextAttrs()
self.cur_depth += 1
def create_root(self): #Root table
self.cur_context_attributes = ContextAttrs()
def destroy(self):
self.cur_lexeme = ''
for lexeme in self.cur_context_attributes.context_lexemes:
self.cur_entry = self.find(lexeme)
if self.cur_entry:
self.cur_entry.back_out()
if self.cur_entry.semantic_record_stack is None:
del self.sym_table[lexeme]
def insert(self, record):
self.record = record
self.cur_context_attributes.context_lexemes.append(self.record.lexeme)
self.record.offset = self.cur_offset
self.cur_offset += self.record.size
self.existing_entry = self.find(self.record.lexeme)
if self.existing_entry is None:
self.new_entry = SemanticEntry()
# self.record.depth = 0
self.new_entry.put(self.record)
self.sym_table[self.record.lexeme] = self.new_entry
else:
self.record.depth = self.existing_entry.depth
self.existing_entry.put(self.record)
def find(self, lexeme):
if self.sym_table.get(lexeme, None):
return self.sym_table.get(lexeme, None)
elif self.parent_table and self.parent_table.sym_table.get(lexeme,None):
return self.parent_table.find(lexeme)
else:
return None
def __repr__(self):
output = "\n[%7s |%7s |%7s |%7s |%7s |%7s ]" % ("lexeme", "kind",
"type", "size",
"offset", "depth")
for k,v in self.sym_table.items():
output = output + '\n' + v.cur_record.__repr__()
return output
