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File: //var/opt/nydus/ops/pycparser/__pycache__/ast_transforms.cpython-39.pyc
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�,�h;�@s0ddlmZdd�Zdd�Zdd�Zdd	�Zd
S)�)�c_astcCs�t|tj�sJ�t|jtj�s"|St�g|jj�}d}|jjp@gD]\}t|tjtjf�r||j�	|�t
||j�|jd}qB|dur�|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���)�
isinstancerZSwitch�stmtZCompoundZcoordZblock_items�Case�Default�append�_extract_nested_case�stmts)Zswitch_nodeZnew_compoundZ	last_case�child�r�I/opt/nydus/tmp/pip-target-wkfpz8uv/lib/python/pycparser/ast_transforms.py�fix_switch_cases
s3rcCs:t|jdtjtjf�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.
    �rN)rr
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r	csr	cCs~t|�\}}|sqq|}t|tj�sHz
|j}WqtyD|YS0qd|jvrhd|jvrh|j�d�|jdurz|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_oncerr�TypeDecl�type�AttributeError�qualsrZdeclname�name)�decl�found�typrrr
�fix_atomic_specifiersls

rcCs�|}d}|j}|dur^t|tj�r.d|jvr.q^z|}|}|j}WqtyZ|dfYS0qt|tj�snJ�|j|_d|jjvr�|jj�d�|dfS)z� Performs one 'fix' round of atomic specifiers.
        Returns (modified_decl, found) where found is True iff a fix was made.
    NrFT)rrrZTypenamerrrr)r�parentZgrandparent�noderrr
r�s"
rN)�rrr	rrrrrr
�<module>
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