def visit_VarDecl(self, node):
# For now, manually create a symbol for the INTEGER built-in type
# and insert the type symbol in the symbol table.
type_symbol = BuiltinTypeSymbol('INTEGER')
self.symtab.insert(type_symbol)
# We have all the information we need to create a variable symbol.
# Create the symbol and insert it into the symbol table.
var_name = node.var_node.value
var_symbol = VarSymbol(var_name, type_symbol)
self.symtab.insert(var_symbol)
def _init_builtins(self):
self.insert(BuiltinTypeSymbol('INTEGER'))
self.insert(BuiltinTypeSymbol('REAL'))
return s
__repr__ = __str__
def insert(self, symbol):
print('Insert: %s' % symbol.name)
self._symbols[symbol.name] = symbol
if __name__ == '__main__':
text = """
program SymTab1;
var x, y : integer;
begin
end.
"""
lexer = Lexer(text)
parser = Parser(lexer)
tree = parser.parse()
symtab = SymbolTable()
int_type = BuiltinTypeSymbol('INTEGER')
symtab.insert(int_type)
var_x_symbol = VarSymbol('x', int_type)
symtab.insert(var_x_symbol)
var_y_symbol = VarSymbol('y', int_type)
symtab.insert(var_y_symbol)
print(symtab)