124 lines
2.8 KiB
Python
124 lines
2.8 KiB
Python
|
"""
|
||
|
|
AST nodes specific to the C family of languages
|
||
|
|
"""
|
||
|
|
|
||
|
|
from sympy.codegen.ast import (
|
||
|
|
Attribute, Declaration, Node, String, Token, Type, none,
|
||
|
|
FunctionCall, CodeBlock
|
||
|
|
)
|
||
|
|
from sympy.core.basic import Basic
|
||
|
|
from sympy.core.containers import Tuple
|
||
|
|
from sympy.core.sympify import sympify
|
||
|
|
|
||
|
|
void = Type('void')
|
||
|
|
|
||
|
|
restrict = Attribute('restrict') # guarantees no pointer aliasing
|
||
|
|
volatile = Attribute('volatile')
|
||
|
|
static = Attribute('static')
|
||
|
|
|
||
|
|
|
||
|
|
def alignof(arg):
|
||
|
|
""" Generate of FunctionCall instance for calling 'alignof' """
|
||
|
|
return FunctionCall('alignof', [String(arg) if isinstance(arg, str) else arg])
|
||
|
|
|
||
|
|
|
||
|
|
def sizeof(arg):
|
||
|
|
""" Generate of FunctionCall instance for calling 'sizeof'
|
||
|
|
|
||
|
|
Examples
|
||
|
|
========
|
||
|
|
|
||
|
|
>>> from sympy.codegen.ast import real
|
||
|
|
>>> from sympy.codegen.cnodes import sizeof
|
||
|
|
>>> from sympy.printing import ccode
|
||
|
|
>>> ccode(sizeof(real))
|
||
|
|
'sizeof(double)'
|
||
|
|
"""
|
||
|
|
return FunctionCall('sizeof', [String(arg) if isinstance(arg, str) else arg])
|
||
|
|
|
||
|
|
|
||
|
|
class CommaOperator(Basic):
|
||
|
|
""" Represents the comma operator in C """
|
||
|
|
def __new__(cls, *args):
|
||
|
|
return Basic.__new__(cls, *[sympify(arg) for arg in args])
|
||
|
|
|
||
|
|
|
||
|
|
class Label(Node):
|
||
|
|
""" Label for use with e.g. goto statement.
|
||
|
|
|
||
|
|
Examples
|
||
|
|
========
|
||
|
|
|
||
|
|
>>> from sympy import Symbol
|
||
|
|
>>> from sympy.codegen.cnodes import Label, PreIncrement
|
||
|
|
>>> from sympy.printing import ccode
|
||
|
|
>>> print(ccode(Label('foo')))
|
||
|
|
foo:
|
||
|
|
>>> print(ccode(Label('bar', [PreIncrement(Symbol('a'))])))
|
||
|
|
bar:
|
||
|
|
++(a);
|
||
|
|
|
||
|
|
"""
|
||
|
|
__slots__ = ('name', 'body')
|
||
|
|
defaults = {'body': none}
|
||
|
|
_construct_name = String
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _construct_body(cls, itr):
|
||
|
|
if isinstance(itr, CodeBlock):
|
||
|
|
return itr
|
||
|
|
else:
|
||
|
|
return CodeBlock(*itr)
|
||
|
|
|
||
|
|
|
||
|
|
class goto(Token):
|
||
|
|
""" Represents goto in C """
|
||
|
|
__slots__ = ('label',)
|
||
|
|
_construct_label = Label
|
||
|
|
|
||
|
|
|
||
|
|
class PreDecrement(Basic):
|
||
|
|
""" Represents the pre-decrement operator
|
||
|
|
|
||
|
|
Examples
|
||
|
|
========
|
||
|
|
|
||
|
|
>>> from sympy.abc import x
|
||
|
|
>>> from sympy.codegen.cnodes import PreDecrement
|
||
|
|
>>> from sympy.printing import ccode
|
||
|
|
>>> ccode(PreDecrement(x))
|
||
|
|
'--(x)'
|
||
|
|
|
||
|
|
"""
|
||
|
|
nargs = 1
|
||
|
|
|
||
|
|
|
||
|
|
class PostDecrement(Basic):
|
||
|
|
""" Represents the post-decrement operator """
|
||
|
|
nargs = 1
|
||
|
|
|
||
|
|
|
||
|
|
class PreIncrement(Basic):
|
||
|
|
""" Represents the pre-increment operator """
|
||
|
|
nargs = 1
|
||
|
|
|
||
|
|
|
||
|
|
class PostIncrement(Basic):
|
||
|
|
""" Represents the post-increment operator """
|
||
|
|
nargs = 1
|
||
|
|
|
||
|
|
|
||
|
|
class struct(Node):
|
||
|
|
""" Represents a struct in C """
|
||
|
|
__slots__ = ('name', 'declarations')
|
||
|
|
defaults = {'name': none}
|
||
|
|
_construct_name = String
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def _construct_declarations(cls, args):
|
||
|
|
return Tuple(*[Declaration(arg) for arg in args])
|
||
|
|
|
||
|
|
|
||
|
|
class union(struct):
|
||
|
|
""" Represents a union in C """
|