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walker.h Go to the documentation of this file. // $Id: walker.h,v 1.9 2003/08/07 23:13:57 pnav Exp $ // ---------------------------------------------------------------------- // // C-Breeze // C Compiler Framework // // Copyright (c) 2000 University of Texas at Austin // // Samuel Z. Guyer // Daniel A. Jimenez // Calvin Lin // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, copy, // modify, merge, publish, distribute, sublicense, and/or sell copies // of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT // AUSTIN BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF // OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // // We acknowledge the C-to-C Translator from MIT Laboratory for // Computer Science for inspiring parts of the C-Breeze design. // // ---------------------------------------------------------------------- #ifndef CBZ_WALKER_H #define CBZ_WALKER_H class Walker { public: typedef enum { Preorder, Postorder, Both } Order; typedef enum { Subtree, NodeOnly } Depth; private: Order _order; Depth _depth; public: Walker(Order the_order, Depth depth) : _order(the_order), _depth(depth) {} inline Order order() const { return _order; } inline Depth depth() const { return _depth; } virtual void at_node(Node * the_node, Order ord) { // Default: do nothing } virtual void at_unit(unitNode * the_unit, Order ord) { at_node(the_unit, ord); } virtual void at_def(defNode * the_def, Order ord) { at_node(the_def, ord); } virtual void at_decl(declNode * the_decl, Order ord) { at_def(the_decl, ord); } virtual void at_subdecl(subdeclNode * the_subdecl, Order ord) { at_decl(the_subdecl, ord); } virtual void at_proc(procNode * the_proc, Order ord) { at_def(the_proc, ord); } virtual void at_type(typeNode * the_type, Order ord) { at_node(the_type, ord); } virtual void at_prim(primNode * the_prim, Order ord) { at_type(the_prim, ord); } virtual void at_tdef(tdefNode * the_tdef, Order ord) { at_type(the_tdef, ord); } virtual void at_ptr(ptrNode * the_ptr, Order ord) { at_type(the_ptr, ord); } virtual void at_array(arrayNode * the_array, Order ord) { at_type(the_array, ord); } virtual void at_func(funcNode * the_func, Order ord) { at_type(the_func, ord); } virtual void at_sue(sueNode * the_sue, Order ord) { at_type(the_sue, ord); } virtual void at_struct(structNode * the_struct, Order ord) { at_sue(the_struct, ord); } virtual void at_union(unionNode * the_union, Order ord) { at_sue(the_union, ord); } virtual void at_enum(enumNode * the_enum, Order ord) { at_sue(the_enum, ord); } virtual void at_suespec(suespecNode * the_suespec, Order ord) { at_type(the_suespec, ord); } virtual void at_expr(exprNode * the_expr, Order ord) { at_node(the_expr, ord); } virtual void at_index(indexNode * the_index, Order ord) { at_expr(the_index, ord); } virtual void at_const(constNode * the_const, Order ord) { at_index(the_const, ord); } virtual void at_id(idNode * the_id, Order ord) { at_index(the_id, ord); } virtual void at_binary(binaryNode * the_binary, Order ord) { at_expr(the_binary, ord); } virtual void at_unary(unaryNode * the_unary, Order ord) { at_expr(the_unary, ord); } virtual void at_cast(castNode * the_cast, Order ord) { at_expr(the_cast, ord); } virtual void at_comma(commaNode * the_comma, Order ord) { at_expr(the_comma, ord); } virtual void at_ternary(ternaryNode * the_ternary, Order ord) { at_expr(the_ternary, ord); } virtual void at_call(callNode * the_call, Order ord) { at_expr(the_call, ord); } virtual void at_initializer(initializerNode * the_initializer, Order ord) { at_expr(the_initializer, ord); } virtual void at_stmt(stmtNode * the_stmt, Order ord) { at_node(the_stmt, ord); } virtual void at_block(blockNode * the_block, Order ord) { at_stmt(the_block, ord); } virtual void at_basicblock(basicblockNode * the_basicblock, Order ord) { at_block(the_basicblock, ord); } virtual void at_exprstmt(exprstmtNode * the_exprstmt, Order ord) { at_stmt(the_exprstmt, ord); } virtual void at_target(targetNode * the_target, Order ord) { at_stmt(the_target, ord); } virtual void at_label(labelNode * the_label, Order ord) { at_target(the_label, ord); } virtual void at_case(caseNode * the_case, Order ord) { at_target(the_case, ord); } virtual void at_selection(selectionNode * the_selection, Order ord) { at_stmt(the_selection, ord); } virtual void at_if(ifNode * the_if, Order ord) { at_selection(the_if, ord); } virtual void at_switch(switchNode * the_switch, Order ord) { at_selection(the_switch, ord); } virtual void at_loop(loopNode * the_loop, Order ord) { at_stmt(the_loop, ord); } virtual void at_while(whileNode * the_while, Order ord) { at_loop(the_while, ord); } virtual void at_do(doNode * the_do, Order ord) { at_loop(the_do, ord); } virtual void at_for(forNode * the_for, Order ord) { at_loop(the_for, ord); } virtual void at_jump(jumpNode * the_jump, Order ord) { at_stmt(the_jump, ord); } virtual void at_goto(gotoNode * the_goto, Order ord) { at_jump(the_goto, ord); } virtual void at_continue(continueNode * the_continue, Order ord) { at_jump(the_continue, ord); } virtual void at_break(breakNode * the_break, Order ord) { at_jump(the_break, ord); } virtual void at_return(returnNode * the_return, Order ord) { at_jump(the_return, ord); } virtual void at_attrib(attribNode * the_attrib, Order ord) { at_stmt(the_attrib, ord); } virtual void at_operand(operandNode * the_oper, Order ord) { at_expr(the_oper, ord); } virtual void at_conditiongoto(conditiongotoNode * the_condgoto, Order ord) { at_goto(the_condgoto, ord); } virtual void at_threeAddr(threeAddrNode * the_3addr, Order ord) { at_stmt(the_3addr, ord); } virtual void at_text(textNode * the_text, Order ord) { at_node(the_text, ord); } private: /* -- Deprecated... virtual void at_implicitcast(implicitcastNode * the_implicitcast, Order ord) { at_expr(the_implicitcast, ord); } virtual void at_default(defaultNode * the_default, Order ord) { at_target(the_default, ord); } virtual void at_ifelse(ifelseNode * the_ifelse, Order ord) { at_selection(the_ifelse, ord); } */ }; // -- Invoke the walker on a list... template< class T > void list_walker(list< T > & l, Walker & the_walker) { for (typename list< T >::iterator p = l.begin(); p != l.end(); ++p) (*p)->walk(the_walker); } #endif // CBZ_WALKER_H

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