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update print

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Pekka Laiho 2020-05-28 14:40:54 +07:00
parent 2acdde303a
commit 26b3456595
1 changed files with 45 additions and 30 deletions
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75
src/Lisp.php
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@ -143,37 +143,14 @@ class Lisp
return $expr; return $expr;
} }
public function print($a): string public function print(array $items): void
{ {
$result = $a; for ($i = 0; $i < count($items); $i++) {
if ($i > 0) {
if ($a instanceof Closure) { print(' ');
$result = '<function>';
} elseif ($a instanceof MList) {
$items = [];
foreach ($a->getData() as $val) {
$items[] = $this->print($val);
} }
$result = '(' . implode(' ', $items) . ')'; $this->doPrint($items[$i]);
} elseif ($a instanceof Hash) {
$items = [];
foreach ($a->getData() as $key => $val) {
$items[] = $this->print($key) . ':' . $this->print($val);
}
$result = '{' . implode(' ', $items) . '}';
} elseif ($a instanceof Symbol) {
$result = $a->getName();
} elseif ($a === true) {
$result = 'true';
} elseif ($a === false) {
$result = 'false';
} elseif ($a === null) {
$result = 'null';
} elseif (is_string($a)) {
$result = '"' . $a . '"';
} }
return $result;
} }
public function rep(string $input, Env $env): void public function rep(string $input, Env $env): void
@ -182,9 +159,47 @@ class Lisp
$results = array_map(fn ($expr) => $this->eval($expr, $env), $expressions); $results = array_map(fn ($expr) => $this->eval($expr, $env), $expressions);
$output = array_map(fn ($res) => $this->print($res), $results); $this->print($results);
}
print(implode(' ', $output)); private function doPrint($a): void
{
if ($a instanceof Closure) {
print('<function>');
} elseif ($a instanceof MList) {
print('(');
for ($i = 0; $i < $a->count(); $i++) {
if ($i > 0) {
print(' ');
}
$this->doPrint($a->get($i));
}
print(')');
} elseif ($a instanceof Hash) {
print('{');
$keys = array_keys($a->getData());
for ($i = 0; $i < count($keys); $i++) {
if ($i > 0) {
print(' ');
}
$this->doPrint($keys[$i]);
print(':');
$this->doPrint($a->get($keys[$i]));
}
print('}');
} elseif ($a instanceof Symbol) {
print($a->getName());
} elseif ($a === true) {
print('true');
} elseif ($a === false) {
print('false');
} elseif ($a === null) {
print('null');
} elseif (is_string($a)) {
print('"' . $a . '"');
} else {
print($a);
}
} }
private function readForm(array $tokens, int &$index) private function readForm(array $tokens, int &$index)