Python lex Beispiele

Beispiel #1

Datei: anzu_lexer_desc.py Projekt: vraman/Party

    r"""\d+"""
    try:
        value = int(t.value)
        if not (0 <= value <= 1):
            raise ValueError('currently only 0, 1 are supported')
        t.value = Number(value)
    except ValueError:
        print("Integer value too large %d", t.value)
        t.value = '0'

    return t


def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print('Error somewhere, current token is None')
    assert 0


import third_party.ply.lex as lex

anzu_lexer = lex.lex()

Beispiel #2

Datei: calc.py Projekt: 5nizza/Party

    return t

# Ignored characters
t_ignore = " \t"

def t_newline(t):
    r'\n+'
    t.lexer.lineno += t.value.count("\n")

def t_error(t):
    print("Illegal character '%s'" % t.value[0])
    t.lexer.skip(1)

# Build the lexer
import third_party.ply.lex as lex
lex.lex()

# Parsing rules

precedence = (
    ('left','PLUS','MINUS'),
    ('left','TIMES','DIVIDE'),
    ('right','UMINUS'),
    )

# dictionary of names
names = { }

def p_statement_assign(t):
    'statement : NAME EQUALS expression'
    names[t[1]] = t[3]

Beispiel #3

Datei: par_lexer_desc.py Projekt: 5nizza/Party

def t_SIGNAL_NAME(t):
    r"""[a-zA-Z_][a-zA-Z0-9_]*"""
    # Check for reserved words
    t.type = reserved_all.get(t.value, t.type)

    return t


def t_NUMBER(t):
    r"""\d+"""
    return t


def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print("Error somewhere, current token is None")
    assert 0


import third_party.ply.lex as lex

par_lexer = lex.lex()

Beispiel #4

def t_newline(t):
    r'\n+'
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    print("Illegal character '%s'" % t.value[0])
    t.lexer.skip(1)


# Build the lexer
import third_party.ply.lex as lex

lex.lex()

# Parsing rules

precedence = (
    ('left', 'PLUS', 'MINUS'),
    ('left', 'TIMES', 'DIVIDE'),
    ('right', 'UMINUS'),
)

# dictionary of names
names = {}


def p_statement_assign(t):
    'statement : NAME EQUALS expression'

Beispiel #5

Datei: anzu_lexer_desc.py Projekt: 5nizza/Party

def t_NUMBER(t):
    r"""\d+"""
    try:
        value = int(t.value)
        if not (0 <= value <= 1):
            raise ValueError('currently only 0, 1 are supported')
        t.value = Number(value)
    except ValueError:
        print("Integer value too large %d", t.value)
        t.value = '0'

    return t

def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")

def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print('Error somewhere, current token is None')
    assert 0



import third_party.ply.lex as lex

anzu_lexer = lex.lex()

Beispiel #6

Datei: acacia_lexer_desc.py Projekt: 5nizza/party-elli

def t_NUMBER(t):
    r"""\d+"""
    try:
        value = int(t.value)
        if not (0 <= value <= 1):
            raise ValueError('currently only 0, 1 are supported')
        t.value = Number(value)
    except ValueError:
        print("Integer value too large %d", t.value)
        t.value = '0'

    return t


def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print('Error somewhere, current token is None')
    assert 0


acacia_lexer = lex.lex()

Beispiel #7

Datei: par_lexer_desc.py Projekt: vraman/Party

def t_SIGNAL_NAME(t):
    r"""[a-zA-Z_][a-zA-Z0-9_]*"""
    # Check for reserved words
    t.type = reserved_all.get(t.value, t.type)

    return t


def t_NUMBER(t):
    r"""\d+"""
    return t


def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print('Error somewhere, current token is None')
    assert 0


import third_party.ply.lex as lex

par_lexer = lex.lex()

Beispiel #8

Datei: acacia_lexer_desc.py Projekt: hriener/party-elli

def t_NUMBER(t):
    r"""\d+"""
    try:
        value = int(t.value)
        if not (0 <= value <= 1):
            raise ValueError('currently only 0, 1 are supported')
        t.value = Number(value)
    except ValueError:
        print("Integer value too large %d", t.value)
        t.value = '0'

    return t


def t_newline(t):
    r"""\n+"""
    t.lexer.lineno += t.value.count("\n")


def t_error(t):
    if t:
        print("Illegal character '%s'" % t.value[0])
        t.lexer.skip(1)
    else:
        print('Error somewhere, current token is None')
    assert 0


acacia_lexer = lex.lex()