Viewing file:  AST_lower_expr.h (1.67 KB) -rw-rw-r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* phc -- the open source PHP compiler
* See doc/license/README.license for licensing information
*
* Generic superclass for transformations that replace expressions by
* multiple statements
*/
#ifndef PHC_AST_LOWER_EXPR_H
#define PHC_AST_LOWER_EXPR_H
#include "AST_transform.h"
#include "lib/Stack.h"
namespace AST
{
class Lower_expr : public Transform, virtual public GC_obj
{
public:
void children_php_script(PHP_script* in);
public:
void children_if (If* in);
void post_if (If* in, Statement_list* out);
void children_while (While* in);
void post_while (While* in, Statement_list* out);
void children_foreach (Foreach* in);
void post_foreach (Foreach* in, Statement_list* out);
// Switch is already lowered
// Do is already lowered
// For is already lowered
// Try blocks don't have expressions so don't need special treatment
// Static declarations cannot be lowered
void post_eval_expr (Eval_expr* in, Statement_list* out);
void post_return (Return* in, Statement_list* out);
void post_global (Global* in, Statement_list* out);
void post_continue (Continue* in, Statement_list* out);
void post_break (Break* in, Statement_list* out);
void post_throw (Throw* in, Statement_list* out);
// Common code generation patterns
protected:
Expr* eval(Expr* in);
void eval(Expr* in, Variable* temp);
// Define a number of hooks that can be redefined by inheriting classes
// to tweak the behaviour of the transformation
protected:
virtual void push_back_pieces(Statement* in, Statement_list* out);
virtual void backup_pieces();
virtual void restore_pieces();
protected:
Statement_list* pieces;
Stack<Statement_list*> pieces_backup;
};
}
#endif // PHC_AST_LOWER_EXPR_H
|