Viewing file:  Split_unset_isset.cpp (1.41 KB) -rw-rw-r--
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/*
* phc -- the open source PHP compiler
* See doc/license/README.license for licensing information
*
* Move isset and unset into individual calls.
*/
#include "Split_unset_isset.h"
using namespace AST;
/*
* Convert
* unset($x, $y, $z);
* into
* unset($x);
* unset($y);
* unset($z);
*/
void Split_unset_isset::pre_eval_expr(Eval_expr * in, Statement_list* out)
{
Expr* unset = new Method_invocation(
NULL, // NULL target
new METHOD_NAME(new String("unset")),
NULL // Arbitrary list of parameters
);
if(in->expr->match(unset))
{
Method_invocation* inv = dyc<Method_invocation>(in->expr);
foreach(Actual_parameter* ap, *inv->actual_parameters)
{
assert(!ap->is_ref);
out->push_back(new Eval_expr(new Method_invocation("unset", ap->expr)));
}
}
else
{
out->push_back(in);
}
}
/*
* convert
* isset($x, $y, $z)
* into
* isset($x) && isset($y) && isset($z)
*/
Expr* Split_unset_isset::pre_method_invocation(Method_invocation* in)
{
if(in->method_name->match(new METHOD_NAME("isset")))
{
Expr_list* terms = new Expr_list;
foreach(Actual_parameter* ap, *in->actual_parameters)
{
assert(!ap->is_ref);
terms->push_back(new Method_invocation("isset", ap->expr));
}
Expr_list::const_iterator j = terms->begin();
Expr* result = *j++;
for( ; j != terms->end(); j++)
{
result = new Bin_op(result, *j, "&&");
}
return result;
}
else
{
return in;
}
}
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