madgraph.iolibs.ufo_expression_parsers.UFOExpressionParser

Class UFOExpressionParser

A base class for parsers for algebraic expressions coming from UFO.

Instance Methods

[hide private]

__init__(self, **kw)
Ininitialize the lex and yacc

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parse(self, buf)
Parse the string buf

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t_CSC(self, t)
(?<!\w)csc(?=\()

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t_SEC(self, t)
(?<!\w)sec(?=\()

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t_ACSC(self, t)
(?<!\w)acsc(?=\()

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t_ASEC(self, t)
(?<!\w)asec(?=\()

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t_SQRT(self, t)
cmath\.sqrt

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t_PI(self, t)
cmath\.pi

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t_CONJ(self, t)
complexconjugate

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t_IM(self, t)
(?<!\w)im(?=\()

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t_RE(self, t)
(?<!\w)re(?=\()

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t_COMPLEX(self, t)
(?<!\w)complex(?=\()

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t_FUNCTION(self, t)
(cmath\.){0,1}[a-zA-Z_][0-9a-zA-Z_]*(?=\()

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t_VARIABLE(self, t)
[a-zA-Z_][0-9a-zA-Z_]*

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t_newline(self, t)
\n+

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t_error(self, t)

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build(self, **kwargs)

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p_statement_expr(self, p)
statement : expression

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p_expression_binop(self, p)
expression : expression '=' expression | expression '+' expression | expression '-' expression | expression '*' expression | expression '/' expression

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p_expression_uminus(self, p)
expression : '-' expression %prec UMINUS

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p_group_parentheses(self, p)
group : '(' expression ')'

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p_expression_group(self, p)
expression : group

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p_expression_function1(self, p)
expression : FUNCTION '(' expression ')'

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p_expression_function2(self, p)
expression : FUNCTION '(' expression ',' expression ')'

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p_error(self, p)

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Class Variables

[hide private]

parsed_string = ''

tokens = ('POWER', 'CSC', 'SEC', 'ACSC', 'ASEC', 'SQRT', 'CONJ...

literals = '=+-*/(),'

t_NUMBER = '([0-9]+\\.[0-9]*|\\.[0-9]+|[0-9]+)([eE][+-]{0,1}[0...

t_POWER = '\\*\\*'

t_ignore = ' \t'

re_cmath_function = re.compile(r'cmath\.(?P<name>[0-9a-zA-Z_]+)')

precedence = (('left', '='), ('left', '+', '-'), ('left', '*',...

Class Variable Details

[hide private]

tokens

Value:

('POWER',
 'CSC',
 'SEC',
 'ACSC',
 'ASEC',
 'SQRT',
 'CONJ',
 'RE',
...

t_NUMBER

Value:

'([0-9]+\\.[0-9]*|\\.[0-9]+|[0-9]+)([eE][+-]{0,1}[0-9]+){0,1}'

precedence

Value:

(('left', '='),
 ('left', '+', '-'),
 ('left', '*', '/'),
 ('right', 'UMINUS'),
 ('left', 'POWER'),
 ('right', 'CSC'),
 ('right', 'SEC'),
 ('right', 'ACSC'),
...