Move monkey.prolog to root module

3 files changed, 0 insertions, 376 deletions

diff --git a/monkey/prolog/engine.py b/monkey/prolog/engine.py
deleted file mode 100644
index af79535..0000000
--- a/monkey/prolog/engine.py
+++ /dev/null
@@ -1,134 +0,0 @@
-#!/usr/bin/python3
-
-import collections
-import http.client
-import json
-import re
-import urllib
-
-# Create a new pengine. If query is given: run it, destroy the engine and
-# return the reply. Otherwise, return the ID of the new pengine.
-def create(code=''):
-    opts = {'format': 'json-s', 'destroy': True, 'src_text': code}
-    reply, messages = request('POST', '/pengine/create', body=json.dumps(opts))
-
-    if reply['event'] != 'create' or 'error' in messages:
-        raise Exception('\n'.join(messages['error']))
-
-    return reply['id']
-
-def create_and_ask(code, query):
-    opts = {'format': 'json-s', 'destroy': True, 'src_text': code, 'ask': query}
-    reply, messages = request('POST', '/pengine/create', body=json.dumps(opts))
-
-    if reply['event'] != 'create' or 'error' in messages:
-        raise Exception('\n'.join(messages['error']))
-
-    return reply['answer']['data']
-
-def ask(engine, query):
-    return send(engine, 'ask(({}),[])'.format(query))
-
-def next(engine, n=1):
-    return send(engine, 'next({})'.format(n))
-
-def stop(engine):
-    return send(engine, 'stop')
-
-def destroy(engine):
-    return send(engine, 'destroy')
-
-def send(engine, event):
-    params = urllib.parse.urlencode({
-        'id': engine,
-        'event': event,
-        'format': 'json-s'})
-    reply, messages = request('GET', '/pengine/send?' + params)
-    return reply
-
-# Return the main reply and pull potential output replies.
-address, port = 'localhost', 3030  # TODO put this somewhere sane
-def request(method, path, body=None):
-    headers = {'Content-Type': 'application/json;charset=utf-8'}
-    messages = collections.defaultdict(list)
-    try:
-        conn = http.client.HTTPConnection(address, port, timeout=10)
-        conn.request(method, path, body, headers=headers)
-        while True:
-            response = conn.getresponse()
-            if response.status != http.client.OK:
-                raise Exception('server returned {}'.format(response.status))
-
-            reply = json.loads(response.read().decode('utf-8'))
-            if reply['event'] == 'output':
-                msg_type, msg_data = get_message(reply)
-                messages[msg_type].append(msg_data)
-
-                # Request next reply.
-                params = urllib.parse.urlencode({
-                    'id': reply['id'],
-                    'format': 'json-s'})
-                conn.request('GET', '/pengine/pull_response?' + params, headers=headers)
-            else:
-                return reply, messages
-    finally:
-        conn.close()
-
-# Strip boilerplate from Prolog messages … ugly.
-def get_message(reply):
-    match = re.match(r'.*<pre class="[^"]*">(.*)</pre>.*',
-                     reply['data'], flags=re.DOTALL)
-    data = match.group(1).strip()
-    message = ''
-    if reply['message'] == 'error':
-        if 'location' in reply:
-            loc = reply['location']
-            message += 'near line ' + str(loc['line'])
-            if 'ch' in loc:
-                message += ', character ' + str(loc['ch'])
-            message += ': '
-
-        if reply.get('code') == 'syntax_error':
-            match = re.match(r'^.*Syntax error: (.*)$', data, flags=re.DOTALL)
-            message += match.group(1)
-        elif reply.get('code') == 'permission_error':
-            match = re.match(r'^.*(No permission [^\n]*)', data, flags=re.DOTALL)
-            message += match.group(1)
-        elif reply.get('code') == 'type_error':
-            match = re.match(r'^.*(Type error: [^\n]*)', data, flags=re.DOTALL)
-            message += match.group(1)
-        else:
-            message += data
-
-    # Replace anonymous variable names with _.
-    message = re.sub(r'_G[0-9]*', '_', message)
-    return reply['message'], message
-
-# Test whether [code] is a correct solution for problem [name]. Runs all tests
-# and returns a list of results. Raises an exception on error.
-def test_all(name, code):
-    reply = create_and_ask(code=code, query="run_tests({}, Results)".format(name))
-
-    if reply['event'] != 'success':
-        raise Exception('testing procedure failed')
-
-    results = re.findall(r'(?:success|failure)\([^)]*\)', reply['data'][0]['Results'])
-    n_total = len(results)
-    n_passed = len([r for r in results if r.startswith('success')])
-    return n_passed, n_total
-
-# Test whether [code] is a correct solution for problem [name]. Returns a bool
-# and stops on first failure.
-def test(name, code):
-    try:
-        reply = create_and_ask(code=code, query='run_tests({})'.format(name))
-        return reply['event'] == 'success'
-    except Exception as ex:
-        return False
-
-# Basic sanity check.
-if __name__ == '__main__':
-    engine = PrologEngine(code='dup([],[]). dup([H|T],[H,H|TT]) :- dup(T,TT).')
-    print('engine id is ' + engine.id)
-    print(engine.ask("run_tests({}, Result)".format('dup/2')))
-    engine.destroy()
diff --git a/monkey/prolog/lexer.py b/monkey/prolog/lexer.py
deleted file mode 100644
index 971e8a6..0000000
--- a/monkey/prolog/lexer.py
+++ /dev/null
@@ -1,90 +0,0 @@
-#!/usr/bin/python3
-
-import ply.lex as lex
-
-# LEXER
-
-#states = (
-#    ('comment', 'exclusive'),
-#)
-
-# tokens; treat operators as names if followed by (
-operators = {
-    r':-':  'FROM',
-    r'->':  'IMPLIES',
-    r'\+':  'NOT',
-    r'not': 'NOT',
-    r'=':   'EQU',
-    r'\=':  'NEQU',
-    r'==':  'EQ',
-    r'\==': 'NEQ',
-    r'=..': 'UNIV',
-    r'is':  'IS',
-    r'=:=': 'EQA',
-    r'=\=': 'NEQA',
-    r'<':   'LT',
-    r'=<':  'LE',
-    r'>':   'GT',
-    r'>=':  'GE',
-    r'@<':  'LTL',
-    r'@=<': 'LEL',
-    r'@>':  'GTL',
-    r'@>=': 'GEL',
-    r'+':   'PLUS',
-    r'-':   'MINUS',
-    r'*':   'STAR',
-    r'/':   'DIV',
-    r'//':  'IDIV',
-    r'mod': 'MOD',
-    r'**':  'POW',
-    r'.':   'PERIOD',
-    r',':   'COMMA',
-    r';':   'SEMI'
-}
-tokens = list(operators.values()) + [
-    'UINTEGER', 'UREAL',
-    'NAME', 'VARIABLE', 'STRING',
-    'LBRACKET', 'RBRACKET', 'LPAREN', 'RPAREN', 'PIPE', 'LBRACE', 'RBRACE',
-    'INVALID'
-]
-
-# punctuation
-t_LBRACKET = r'\['
-t_RBRACKET = r'\]'
-t_LPAREN = r'\('
-t_RPAREN = r'\)'
-t_PIPE = r'\|'
-t_LBRACE = r'{'
-t_RBRACE = r'}'
-
-t_UINTEGER = r'[0-9]+'
-t_UREAL    = r'[0-9]+\.[0-9]+([eE][-+]?[0-9]+)?|inf|nan'
-t_VARIABLE = r'(_|[A-Z])[a-zA-Z0-9_]*'
-t_STRING   = r'"(""|\\.|[^\"])*"'
-
-# no support for nested comments yet
-def t_comment(t):
-    r'(/\*(.|\n)*?\*/)|(%.*)'
-    pass
-
-def t_NAME(t):
-    r"'(''|\\.|[^\\'])*'|[a-z][a-zA-Z0-9_]*|[-+*/\\^<>=~:.?@#$&]+|!|;|,"
-    if t.lexer.lexpos >= len(t.lexer.lexdata) or t.lexer.lexdata[t.lexer.lexpos] != '(':
-        t.type = operators.get(t.value, 'NAME')
-    return t
-
-t_ignore  = ' \t'
-
-def t_newline(t):
-    r'\n+'
-    t.lexer.lineno += len(t.value)
-
-def t_error(t):
-    # TODO send this to stderr
-    #print("Illegal character '" + t.value[0] + "'")
-    t.type = 'INVALID'
-    t.value = t.value[0]
-    t.lexer.skip(1)
-    return t
-
-lexer = lex.lex()
diff --git a/monkey/prolog/util.py b/monkey/prolog/util.py
deleted file mode 100644
index 8d8b266..0000000
--- a/monkey/prolog/util.py
+++ /dev/null
@@ -1,152 +0,0 @@
-#!/usr/bin/python3
-
-from .lexer import lexer, operators
-from ..util import Token
-
-# Return a list of tokens in [text].
-def tokenize(text):
-    lexer.input(text)
-    return [Token(t.type, t.value, t.lexpos) for t in lexer]
-
-# Return a one-line string representation of [tokens].
-def stringify(tokens):
-    def token_str(t):
-        if t.type in ('PERIOD', 'COMMA'):
-            return str(t) + ' '
-        if t.type in operators.values():
-            return ' ' + str(t) + ' '
-        return str(t)
-    return ''.join(map(token_str, tokens))
-
-# Yield the sequence of rules in [code].
-def split(code):
-    tokens = tokenize(code)
-    start = 0
-    for idx, token in enumerate(tokens):
-        if token.type == 'PERIOD' and idx - start > 1:
-            yield stringify(tokens[start:idx])
-            start = idx + 1
-
-# Return a list of lines in [code] and a list of rule ranges.
-def decompose(code):
-    lines = []
-    rules = []
-    tokens = tokenize(code)
-    tokens.append(Token('EOF'))
-
-    line = []
-    parens = []
-    rule_start = 0
-    for t in tokens:
-        if t.type == 'SEMI':
-            if line != []:
-                lines.append(tuple(line))
-                line = []
-            lines.append((t,))
-            continue
-        if not parens:
-            if t.type in ('PERIOD', 'FROM', 'COMMA', 'EOF'):
-                if line != []:
-                    lines.append(tuple(line))
-                    line = []
-                if t.type in ('PERIOD', 'EOF') and rule_start < len(lines):
-                    rules.append((rule_start, len(lines)))
-                    rule_start = len(lines)
-                continue
-        if t.type in ('LPAREN', 'LBRACKET', 'LBRACE'):
-            parens.append(t.type)
-        elif parens:
-            if t.type == 'RPAREN' and parens[-1] == 'LPAREN':
-                parens.pop()
-            elif t.type == 'RBRACKET' and parens[-1] == 'LBRACKET':
-                parens.pop()
-            elif t.type == 'RBRACE' and parens[-1] == 'LBRACE':
-                parens.pop()
-        line.append(t)
-    return lines, rules
-
-# Format a list of [lines] according to [rules] (as returned by decompose).
-def compose(lines, rules):
-    code = ''
-    for start, end in rules:
-        for i in range(start, end):
-            line = lines[i]
-            if i > start:
-                code += '  '
-            code += stringify(line)
-            if i == end-1:
-                code += '.\n'
-            elif i == start:
-                code += ' :-\n'
-            else:
-                if line and line[-1].type != 'SEMI' and lines[i+1][-1].type != 'SEMI':
-                    code += ','
-                code += '\n'
-    return code.strip()
-
-# Rename variables in [tokens] to A0, A1, A2,… in order of appearance.
-def rename_vars(tokens, names=None):
-    if names is None:
-        names = {}
-    next_id = len(names)
-
-    # Return a new list.
-    tokens = list(tokens)
-    for i in range(len(tokens)):
-        if tokens[i].type == 'PERIOD':
-            names.clear()
-            next_id = 0
-        elif tokens[i] == Token('VARIABLE', '_'):
-            tokens[i] = Token('VARIABLE', 'A{}'.format(next_id))
-            next_id += 1
-        elif tokens[i].type == 'VARIABLE':
-            cur_name = tokens[i].val
-            if cur_name not in names:
-                names[cur_name] = 'A{}'.format(next_id)
-                next_id += 1
-            tokens[i] = Token('VARIABLE', names[cur_name])
-    return tokens
-
-# transformation = before → after; applied on line which is part of rule
-# return mapping from formal vars in before+after to actual vars in rule
-# line and rule should of course not be normalized
-def map_vars(before, after, line, rule):
-    mapping = {}
-    new_index = 0
-    for i in range(len(before)):
-        if line[i].type == 'VARIABLE':
-            formal_name = before[i].val
-            if line[i].val != '_':
-                actual_name = line[i].val
-            else:
-                actual_name = 'New'+str(new_index)
-                new_index += 1
-            mapping[formal_name] = actual_name
-
-    remaining_formal = [t.val for t in after if t.type == 'VARIABLE' and t.val not in mapping.keys()]
-    remaining_actual = [t.val for t in rule if t.type == 'VARIABLE' and t.val != '_' and t.val not in mapping.values()]
-
-    while len(remaining_actual) < len(remaining_formal):
-        remaining_actual.append('New'+str(new_index))
-        new_index += 1
-
-    for i, formal_name in enumerate(remaining_formal):
-        mapping[formal_name] = remaining_actual[i]
-
-    return mapping
-
-# Basic sanity check.
-if __name__ == '__main__':
-    code = 'dup([H|T], [H1|T1]) :- dup(T1, T2). '
-    lines, rules = decompose(code)
-    print(compose(lines, rules))
-
-    var_names = {}
-    before = rename_vars(tokenize("dup([A0|A1], [A2|A3])"), var_names)
-    after = rename_vars(tokenize("dup([A0|A1], [A5, A4|A3])"), var_names)
-
-    line = lines[0]
-    rule = tokenize(code)
-
-    mapping = map_vars(before, after, line, rule)
-    print(mapping)