function yay_parse(string $source, Directives $directives = null, BlueContext $blueContext = null) : string
{
if ($gc = gc_enabled()) {
gc_disable();
}
// important optimization!
static $globalDirectives = null;
if (null === $globalDirectives) {
$globalDirectives = new ArrayObject();
}
$directives = $directives ?: new Directives();
$blueContext = $blueContext ?: new BlueContext();
$cg = (object) ['ts' => TokenStream::fromSource($source), 'directives' => $directives, 'cycle' => new Cycle($source), 'globalDirectives' => $globalDirectives, 'blueContext' => $blueContext];
foreach ($cg->globalDirectives as $d) {
$cg->directives->add($d);
}
traverse(midrule(function (TokenStream $ts) use($directives, $blueContext) {
$token = $ts->current();
tail_call:
if (null === $token) {
return;
}
// skip when something looks like a new macro to be parsed
if ('macro' === (string) $token) {
return;
}
// here we do the 'magic' to match and expand userland macros
$directives->apply($ts, $token, $blueContext);
$token = $ts->next();
goto tail_call;
}), consume(chain(token(T_STRING, 'macro')->as('declaration'), optional(repeat(rtoken('/^·\\w+$/')))->as('tags'), lookahead(token('{')), commit(chain(braces()->as('pattern'), operator('>>'), braces()->as('expansion')))->as('body'), optional(token(';'))), CONSUME_DO_TRIM)->onCommit(function (Ast $macroAst) use($cg) {
$scope = Map::fromEmpty();
$tags = Map::fromValues(array_map('strval', $macroAst->{'tags'}));
$pattern = new Pattern($macroAst->{'declaration'}->line(), $macroAst->{'body pattern'}, $tags, $scope);
$expansion = new Expansion($macroAst->{'body expansion'}, $tags, $scope);
$macro = new Macro($tags, $pattern, $expansion, $cg->cycle);
$cg->directives->add($macro);
// allocate the userland macro
// allocate the userland macro globally if it's declared as global
if ($macro->tags()->contains('·global')) {
$cg->globalDirectives[] = $macro;
}
}))->parse($cg->ts);
$expansion = (string) $cg->ts;
if ($gc) {
gc_enable();
}
return $expansion;
}
/* time to leave the comment?? */
$tmp = substr($code, $character_index - 1, 1);
if ($tmp == '*') {
$scope = CODE;
}
/* we only enter multi-line-comment mode from CODE scope AFAIK */
}
}
}
}
break;
case '{':
if ($scope == CODE) {
/* start-of-block curly brace */
/* Sigbjørn special: do not wrap and indent empty blocks (object literal) */
if (lookahead($code, $character_index, true) == '}') {
/* we have an object literal. We'll simply add a closing brace and jump ahead */
$character_index = strpos($code, '}', $character_index);
$post = '}';
break;
}
$num_indents++;
$post = "\n";
$post .= str_repeat("\t", $num_indents);
$at_start_of_statement_or_expression = true;
} else {
if ($scope == ESCAPE) {
$scope = $before_escape_scope;
}
}
break;