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# -*- coding: utf-8 -*-
"""
Part of the astor library for Python AST manipulation.
License: 3-clause BSD
Copyright (c) 2015 Patrick Maupin
This module provides data and functions for mapping
AST nodes to symbols and precedences.
"""
import ast
op_data = """
GeneratorExp 1
Assign 1
AnnAssign 1
AugAssign 0
Expr 0
Yield 1
YieldFrom 0
If 1
For 0
AsyncFor 0
While 0
Return 1
Slice 1
Subscript 0
Index 1
ExtSlice 1
comprehension_target 1
Tuple 0
FormattedValue 0
Comma 1
NamedExpr 1
Assert 0
Raise 0
call_one_arg 1
Lambda 1
IfExp 0
comprehension 1
Or or 1
And and 1
Not not 1
Eq == 1
Gt > 0
GtE >= 0
In in 0
Is is 0
NotEq != 0
Lt < 0
LtE <= 0
NotIn not in 0
IsNot is not 0
BitOr | 1
BitXor ^ 1
BitAnd & 1
LShift << 1
RShift >> 0
Add + 1
Sub - 0
Mult * 1
Div / 0
Mod % 0
FloorDiv // 0
MatMult @ 0
PowRHS 1
Invert ~ 1
UAdd + 0
USub - 0
Pow ** 1
Await 1
Num 1
Constant 1
"""
op_data = [x.split() for x in op_data.splitlines()]
op_data = [[x[0], ' '.join(x[1:-1]), int(x[-1])] for x in op_data if x]
for index in range(1, len(op_data)):
op_data[index][2] *= 2
op_data[index][2] += op_data[index - 1][2]
precedence_data = dict((getattr(ast, x, None), z) for x, y, z in op_data)
symbol_data = dict((getattr(ast, x, None), y) for x, y, z in op_data)
def get_op_symbol(obj, fmt='%s', symbol_data=symbol_data, type=type):
"""Given an AST node object, returns a string containing the symbol.
"""
return fmt % symbol_data[type(obj)]
def get_op_precedence(obj, precedence_data=precedence_data, type=type):
"""Given an AST node object, returns the precedence.
"""
return precedence_data[type(obj)]
class Precedence(object):
vars().update((x, z) for x, y, z in op_data)
highest = max(z for x, y, z in op_data) + 2
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