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;
}
function testPush()
{
$ts = TokenStream::fromSource("<?php 1 2 3 ");
$ts->push(new Token(T_LNUMBER, '4'));
$ts->push(new Token(T_WHITESPACE, ' '));
$ts->push(new Token(T_LNUMBER, '5'));
$ts->push(new Token(T_WHITESPACE, ' '));
$this->assertEquals('<?php 1 2 3 4 5 ', (string) $ts);
$ts = TokenStream::fromEmpty();
$ts->push(new Token(T_STRING, 'A'));
$ts->push(new Token(T_WHITESPACE, ' '));
$ts->push(new Token(T_STRING, 'B'));
$ts->push(new Token(T_WHITESPACE, ' '));
$this->assertEquals('A B ', (string) $ts);
$ts->extract($ts->index(), $ts->index()->next->next->next);
$this->assertEquals(' ', (string) $ts);
$ts->push(new Token(T_STRING, 'C'));
$this->assertEquals(' C', (string) $ts);
}
function testastNestedAst()
{
$ts = TokenStream::fromSource('<?php
interface Foo
{
public abstract function foo();
public abstract static function bar();
function baz();
}
');
$modifier = either(token(T_PUBLIC), token(T_STATIC), token(T_PRIVATE));
$modifiers = optional(either(chain($modifier, $modifier), $modifier));
$ast = chain(token(T_OPEN_TAG), chain(token(T_INTERFACE), token(T_STRING)->as('name'), token('{'), optional(repeat(chain(optional(either(repeat(either(token(T_PUBLIC)->as('public'), token(T_STATIC)->as('static'), token(T_ABSTRACT)->as('abstract'))), always(new Token(T_PUBLIC, 'public'))->as('public')))->as('is'), token(T_FUNCTION), token(T_STRING)->as('name'), token('('), token(')'), token(';')), token('}')))->as('methods'), token('}'))->as('interface'))->parse($ts);
$this->assertEquals('Foo', (string) $ast->{'interface name'});
$this->assertEquals('foo', (string) $ast->{'interface methods 0 name'});
$this->assertEquals('public', (string) $ast->{'interface methods 0 is public'});
$this->assertEquals('abstract', (string) $ast->{'interface methods 0 is abstract'});
$this->assertEmpty($ast->{'interface methods 0 is static'});
$this->assertEquals('bar', (string) $ast->{'interface methods 1 name'});
$this->assertEquals('public', (string) $ast->{'interface methods 1 is public'});
$this->assertEquals('abstract', (string) $ast->{'interface methods 1 is abstract'});
$this->assertEquals('static', (string) $ast->{'interface methods 1 is static'});
$this->assertEquals('baz', (string) $ast->{'interface methods 2 name'});
$this->assertEquals('public', (string) $ast->{'interface methods 2 is public'});
$this->assertNull($ast->{'interface methods 2 is abstract'});
$this->assertNull($ast->{'interface methods 2 is static'});
}
function testPush()
{
$ts = TokenStream::fromSource("<?php 1 2 3 ");
$ts->push(new Token(T_LNUMBER, '4'));
$ts->push(new Token(T_WHITESPACE, ' '));
$ts->push(new Token(T_LNUMBER, '5'));
$ts->push(new Token(T_WHITESPACE, ' '));
$this->assertEquals('<?php 1 2 3 4 5 ', (string) $ts);
$ts = TokenStream::fromSource('<?php ');
$ts->push(new Token(T_STRING, 'A'));
$ts->push(new Token(T_WHITESPACE, ' '));
$ts->push(new Token(T_STRING, 'B'));
$ts->push(new Token(T_WHITESPACE, ' '));
$this->assertEquals('<?php A B ', (string) $ts);
}
function yay_parse(string $source, string $salt) : string
{
start:
if ($gc = gc_enabled()) {
gc_disable();
}
$ts = TokenStream::fromSource($source);
$directives = new Directives();
$cycle = new Cycle($salt);
declaration:
$from = $ts->index();
if (!($token = $ts->current())) {
goto end;
}
if ($token->contains('macro')) {
$declaration = $token;
$ts->next();
goto tags;
}
goto any;
tags:
$tags = [];
while (($token = $ts->current()) && preg_match('/^·\\w+$/', (string) $token)) {
$tags[] = $token;
$ts->next();
}
pattern:
$index = $ts->index();
$pattern = [];
$level = 1;
if (!($token = $ts->current()) || !$token->is('{')) {
goto any;
}
$ts->next();
while (($token = $ts->current()) && ($level += LAYER_DELIMITERS[$token->type()] ?? 0)) {
$pattern[] = $token;
$token = $ts->step();
}
if (!$token || !$token->is('}')) {
$ts->jump($index);
(new Error(new Expected(new Token('}')), $ts->current(), $ts->last()))->halt();
}
$ts->next();
__:
// >>
$index = $ts->index();
$operator = '>>';
$max = strlen($operator);
$buffer = '';
while (mb_strlen($buffer) <= $max && ($token = $ts->current())) {
$buffer .= (string) $token;
$ts->step();
if ($buffer === $operator) {
$ts->skip(T_WHITESPACE);
goto expansion;
}
}
$ts->jump($index);
(new Error(new Expected(new Token(token::OPERATOR, $operator)), $ts->current(), $ts->last()))->halt();
expansion:
$index = $ts->index();
$expansion = [];
$level = 1;
if (!($token = $ts->current()) || !$token->is('{')) {
$ts->jump($index);
(new Error(new Expected(new Token('}')), $ts->current(), $ts->last()))->halt();
}
$ts->next();
while (($token = $ts->current()) && ($level += LAYER_DELIMITERS[$token->type()] ?? 0)) {
$expansion[] = $token;
$token = $ts->step();
}
if (!$token || !$token->is('}')) {
$ts->jump($index);
(new Error(new Expected(new Token('}')), $ts->current(), $ts->last()))->halt();
}
// optional ';'
$token = $ts->next();
if ($token->is(';')) {
$ts->next();
}
// cleanup
$ts->unskip(...TokenStream::SKIPPABLE);
$ts->skip(T_WHITESPACE);
$ts->extract($from, $ts->index());
$directives->add(new Macro($declaration->line(), $tags, $pattern, $expansion, $cycle));
goto declaration;
any:
if ($token) {
$directives->apply($ts);
$ts->next();
}
goto declaration;
end:
$expansion = (string) $ts;
if ($gc) {
gc_enable();
}
return $expansion;
}
function expand(TokenStream $ts, Context $context) : TokenStream
{
$ts = TokenStream::fromSource(yay_parse('<?php ' . (string) $ts, $context->get('directives'), $context->get('blueContext')));
$ts->shift();
return $ts;
}
