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add support for vectors to quasiquote

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This commit is contained in:
Pekka Laiho 2020-12-05 17:15:15 +07:00
parent 25ba08a6e7
commit dae6fe455f
1 changed files with 40 additions and 27 deletions
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25
src/Evaller.php
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@ -358,6 +358,25 @@ class Evaller
}
}
return $this->quasiquoteLoop($data);
} elseif ($ast instanceof Vector) {
return new MList([
new Symbol('ltov'),
$this->quasiquoteLoop($ast->getData())
]);
} elseif ($ast instanceof Symbol || $ast instanceof Hash) {
// Quote other forms which are affected by evaluation
return new MList([
new Symbol('quote'),
$ast
]);
} else {
return $ast;
}
}
private function quasiquoteLoop(array $data): MList
{
$result = new MList();
for ($i = count($data) - 1; $i >= 0; $i--) {
@ -383,11 +402,5 @@ class Evaller
}
return $result;
} elseif ($ast instanceof Symbol || $ast instanceof Collection) {
// Quote other forms which are affected by evaluation
return new MList([new Symbol('quote'), $ast]);
} else {
return $ast;
}
}
}