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g�wUc@s&ddlmZd�Zd�ZdS(i(tc_astcCs�t|jtj�s|Stjg|jj�}d}x�|jjD]�}t|tjtjf�r�|jj	|�t
||j�|jd}qD|dkr�|jj	|�qD|jj	|�qDW||_|S(s� 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 it 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.
    i����N(t
isinstancetstmtRtCompoundtcoordtNonetblock_itemstCasetDefaulttappendt_extract_nested_casetstmts(tswitch_nodetnew_compoundt	last_casetchild((s</usr/lib/python2.7/site-packages/pycparser/ast_transforms.pytfix_switch_cases
s4	cCsPt|jdtjtjf�rL|j|jj��t|d|�ndS(s� Recursively extract consecutive Case statements that are made nested
        by the parser and add them to the stmts_list.
    ii����N(RRRRRR	tpopR
(t	case_nodet
stmts_list((s</usr/lib/python2.7/site-packages/pycparser/ast_transforms.pyR
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(((s</usr/lib/python2.7/site-packages/pycparser/ast_transforms.pyt<module>
s	U

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