관리-도구

편집 파일: ast_transforms.cpython-39.pyc

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||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���ZSwitchZstmtZCompoundZcoordZblock_items�Case�Default�append�_extract_nested_case�stmts)Zswitch_nodeZnew_compoundZ	last_case�child��r����</usr/lib/python3.9/site-packages/pycparser/ast_transforms.py�fix_switch_cases
���s����3r
���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���N)��r���r
���r���r���r���r���r����<module>
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