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ast_transforms.cpython-39.pyc
a ���g; � @ s0 d dl mZ dd� Zdd� Zdd� Zdd � Zd S ) � )�c_astc C s� t | tj�sJ �t | jtj�s"| S t�g | jj�}d}| jjp@g D ]\}t |tjtjf�r||j� |� t ||j� |jd }qB|du r�|j� |� qB|j � |� qB|| _| S )a� The 'case' statements in a 'switch' come out of parsing with one child node, so subsequent statements are just tucked to the parent Compound. Additionally, consecutive (fall-through) case statements come out messy. This is a peculiarity of the C grammar. The following: switch (myvar) { case 10: k = 10; p = k + 1; return 10; case 20: case 30: return 20; default: break; } Creates this tree (pseudo-dump): Switch ID: myvar Compound: Case 10: k = 10 p = k + 1 return 10 Case 20: Case 30: return 20 Default: break The goal of this transform is to fix this mess, turning it into the following: Switch ID: myvar Compound: Case 10: k = 10 p = k + 1 return 10 Case 20: Case 30: return 20 Default: break A fixed AST node is returned. The argument may be modified. N���) � isinstancer ZSwitch�stmtZCompoundZcoordZ block_items�Case�Default�append�_extract_nested_case�stmts)Z switch_nodeZ new_compoundZ last_case�child� r �I/opt/nydus/tmp/pip-target-mke_irhy/lib/python/pycparser/ast_transforms.py�fix_switch_cases s 3 r c C s: t | jd tjtjf�r6|�| j�� � t|d |� dS )z� Recursively extract consecutive Case statements that are made nested by the parser and add them to the stmts_list. � r N)r r r r r r �popr )Z case_nodeZ stmts_listr r r r c s r c C s~ t | �\} }|s qq | }t|tj�sHz |j}W q tyD | Y S 0 qd|jv rhd| jvrh| j�d� |jdu rz| j |_| S )aK Atomic specifiers like _Atomic(type) are unusually structured, conferring a qualifier upon the contained type. This function fixes a decl with atomic specifiers to have a sane AST structure, by removing spurious Typename->TypeDecl pairs and attaching the _Atomic qualifier in the right place. �_AtomicN) �_fix_atomic_specifiers_oncer r �TypeDecl�type�AttributeError�qualsr Zdeclname�name)�decl�found�typr r r �fix_atomic_specifiersl s r c C s� | }d}| j }|dur^t|tj�r.d|jv r.q^z|}|}|j }W q tyZ | df Y S 0 qt|tj�snJ �|j |_ d|j jvr�|j j�d� | dfS )z� Performs one 'fix' round of atomic specifiers. Returns (modified_decl, found) where found is True iff a fix was made. Nr FT)r r r ZTypenamer r r r )r �parentZ grandparent�noder r r r � s" r N)� r r r r r r r r r �<module> s V