ast_callbacks.py

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''' @file examples/ast/ast_callbacks.py
@brief The AST call back functions for the AST example.
'''
 
 
import sys
import os
# add the current working directory to the path
# DO NOT MOVE THE FOLLOWING STATEMENT
# if using autopep8 formatter, for example, set argument '--ignore=E402'
sys.path.append(os.getcwd())
from apg_py.lib import utilities as utils
from apg_py.lib import identifiers as id
 
 
def A_ast(state, input, index, length, data):
    if(state == id.SEM_PRE):
        matched = utils.tuple_to_string(input[index:index + length])
        data.append('"' + matched + '" found by AST in rule A')
 
 
def B_ast(state, input, index, length, data):
    if(state == id.SEM_PRE):
        matched = utils.tuple_to_string(input[index:index + length])
        data.append('"' + matched + '" found by AST in rule B')
 
 
def X_ast(state, input, index, length, data):
    if(state == id.SEM_PRE):
        matched = utils.tuple_to_string(input[index:index + length])
        data.append('"' + matched + '" found by AST in rule X')
 
 
def alt1_ast(state, input, index, length, data):
    if(state == id.SEM_POST):
        matched = utils.tuple_to_string(input[index:index + length])
        data.append('"' + matched + '" found by AST in rule ast1')
 
 
def alt2_ast(state, input, index, length, data):
    if(state == id.SEM_POST):
        matched = utils.tuple_to_string(input[index:index + length])
        data.append('"' + matched + '" found by AST in rule ast2')