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File: test/test-recursion.py

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File: test/test-recursion.py
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Grammar Template
Template engine in PHP and other languages
Author: By
Last change:
Date: 2 years ago
Size: 3,432 bytes
 

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#!/usr/bin/env python import os, sys import pprint def import_module(name, path): import imp try: mod_fp, mod_path, mod_desc = imp.find_module(name, [path]) mod = getattr( imp.load_module(name, mod_fp, mod_path, mod_desc), name ) except ImportError as exc: mod = None sys.stderr.write("Error: failed to import module ({})".format(exc)) finally: if mod_fp: mod_fp.close() return mod # import the GrammarTemplate.py engine (as a) module, probably you will want to place this in another dir/package GrammarTemplate = import_module('GrammarTemplate', os.path.join(os.path.dirname(__file__), '../src/python/')) if not GrammarTemplate: print ('Could not load the GrammarTemplate Module') sys.exit(1) else: pass def echo( s='' ): print (s) echo('GrammarTemplate.VERSION = ' + GrammarTemplate.VERSION) echo( ) # # i.e: # foreach "expression:terms" as "term": # foreach "term:factors" as "factor": # .. # # here an :EXPR template is defined which itself uses (anonymous) sub-templates # it is equivalent to (expand sub-templates to distinct): # #<:FACTOR>:=[<lhs>[ <?op> <rhs|NULL>]] # #<:TERM>:=[(<factor:FACTOR>[ AND <*factor:FACTOR>])] # #<:EXPR>:=[<term:TERM>[ OR <*term:TERM>]] # #<expression:EXPR> #<expression2:EXPR> # # tpl = "<:EXPR>:=[<term>:=[(<factor>:=[<globalNegation:NEG><lhs>[ <?op:OP> <rhs|NULL>]][ AND <*factor>])][ OR <*term>]]<expression:EXPR>\n<expression2:EXPR>" def op_func( val, *rest ): return '<>' if '!=' == val else val def neg_func( val, *rest ): return 'NOT ' if val else '' expr = GrammarTemplate(tpl) GrammarTemplate.fnGlobal['NEG'] = neg_func expr.fn['OP'] = op_func echo("input template:") echo(tpl) echo( ) echo("output:") echo(expr.render({ 'globalNegation': True, 'expression' : [ # term [ # factor {'lhs': 1, 'op': '=', 'rhs': 1}, # factor {'lhs': 1, 'op': '=', 'rhs': 2}, # factor {'lhs': 1, 'op': '=', 'rhs': 3} ], # term [ # factor {'lhs': 1, 'op': '<', 'rhs': 1}, # factor {'lhs': 1, 'op': '<', 'rhs': 2}, # factor {'lhs': 1, 'op': '<', 'rhs': 3} ], # term [ # factor {'lhs': 1, 'op': '>', 'rhs': 1}, # factor {'lhs': 1, 'op': '>', 'rhs': 2}, # factor {'lhs': 1, 'op': '>', 'rhs': 3} ] ], 'expression2' : [ # term [ # factor {'lhs': 2, 'op': '=', 'rhs': 1}, # factor {'lhs': 2, 'op': '=', 'rhs': 2}, # factor {'lhs': 2, 'op': '=', 'rhs': 3} ], # term [ # factor {'lhs': 2, 'op': '<', 'rhs': 1}, # factor {'lhs': 2, 'op': '<', 'rhs': 2}, # factor {'lhs': 2, 'op': '<', 'rhs': 3} ], # term [ # factor {'lhs': 2, 'op': '>', 'rhs': 1}, # factor {'lhs': 2, 'op': '>', 'rhs': 2}, # factor {'lhs': 2, 'op': '>', 'rhs': 3} ], # term [ # factor {'lhs': 3}, # factor {'lhs': 3, 'op': '!='} ] ] }))