Viewing file:  Echo_split.cpp (1.26 KB) -rw-rw-r--
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/*
* phc -- the open source PHP compiler
* See doc/license/README.license for licensing information
*
* Convert echo()es to print()s
*/
#include "Echo_split.h"
using namespace AST;
// Split echos into multiple statements. Normal function calls evaluate all
// their actual parameters at once, and then call the expression with the
// results of the evaluations. Echo, however, only evaluates its next argument
// after printing the result of the previouis argument. Functions with
// side-effects will display this.
//
// Convert
// echo f (), f();
// into
// print f();
// print f();
//
// We convert to print simply so the later print transformation is easier.
void Echo_split::pre_eval_expr(Eval_expr* in, Statement_list* out)
{
Method_invocation* echo = new Method_invocation (
NULL,
new METHOD_NAME ("echo"),
NULL); // match any list (note this doesnt get populated. Use in STMT get the list.)
if (not in->expr->match (echo))
{
out->push_back (in);
return;
};
Actual_parameter_list* params =
(dyc <Method_invocation> (in->expr))->actual_parameters;
foreach (Actual_parameter* ap, *params)
{
out->push_back (new Eval_expr (
new Method_invocation (
NULL,
new METHOD_NAME ("print"),
new Actual_parameter_list (ap))));
}
}
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