Viewing file:  canonical_unparser.cpp (2.09 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
*
* Unparse the AST back to PHP syntax, being as explicit as possible. This adds
* bracket around most expressions, removes user-specified brackets and
* curlies.
*/
#include "process_ast/AST_unparser.h"
#include "pass_manager/Plugin_pass.h"
#include "process_ir/General.h"
using namespace AST;
class Canonical_unparser : public virtual AST_unparser
{
bool bracket;
// clear all the users syntax so the PHP_unparser wont print it
// out
void pre_php_script (PHP_script* in)
{
bracket = true;
}
// bracket all allowed expressions
#define WRAP(TYPE_V, TYPE_C) \
void pre_##TYPE_V (TYPE_C* in) { if (bracket) echo ("("); } \
void post_##TYPE_V (TYPE_C* in) { if (bracket) echo (")"); }
// within some constructs, bracketing leads to a parse error
#define EXCEPT_IN(TYPE_V, TYPE_C) \
void pre_##TYPE_V (TYPE_C* in) { bracket = false; } \
void post_##TYPE_V (TYPE_C* in) { bracket = true; }
WRAP (unary_op, Unary_op)
// bin_op handled separately
WRAP (conditional_expr, Conditional_expr)
WRAP (constant, Constant)
WRAP (pre_op, Pre_op)
WRAP (post_op, Post_op)
WRAP (array, Array)
WRAP (literal, Literal)
EXCEPT_IN (attribute, Attribute)
EXCEPT_IN (static_declaration, Static_declaration)
EXCEPT_IN (formal_parameter, Formal_parameter)
EXCEPT_IN (directive, Directive)
#undef WRAP
#undef EXCEPT_IN
void children_bin_op(Bin_op* in)
{
if (*in->op->value != ",") echo("(");
AST_unparser::children_bin_op (in);
if (*in->op->value != ",") echo(")");
}
};
Plugin_pass* this_pass;
extern "C" void load (Pass_manager* pm, Plugin_pass* pass)
{
pm->add_after_named_pass (pass, s("sua"));
this_pass = pass;
}
extern "C" void run_ast (PHP_script* in, Pass_manager* pm, String* option)
{
Canonical_unparser ().unparse (in);
// HACK:
// The pass queue is used multiple times, when we parse some code within the
// compiler. This leads to code being printed multiple times. As a result,
// we turn this off after it runs once.
this_pass->set_enabled (false);
}
|