fix psalm issues (#163)

docs/component/arr.md

@@ -41,7 +41,7 @@
 - [map](./../../src/Psl/Arr/map.php#L34) ( deprecated )
 - [map_keys](./../../src/Psl/Arr/map_keys.php#L34) ( deprecated )
 - [map_with_key](./../../src/Psl/Arr/map_with_key.php#L34) ( deprecated )
-- [merge](./../../src/Psl/Arr/merge.php#L32) ( deprecated )
+- [merge](./../../src/Psl/Arr/merge.php#L34) ( deprecated )
 - [partition](./../../src/Psl/Arr/partition.php#L22) ( deprecated )
 - [random](./../../src/Psl/Arr/random.php#L25) ( deprecated )
 - [select_keys](./../../src/Psl/Arr/select_keys.php#L25) ( deprecated )

docs/component/dict.md

@@ -34,7 +34,7 @@
 - [map](./../../src/Psl/Dict/map.php#L29)
 - [map_keys](./../../src/Psl/Dict/map_keys.php#L29)
 - [map_with_key](./../../src/Psl/Dict/map_with_key.php#L29)
-- [merge](./../../src/Psl/Dict/merge.php#L19)
+- [merge](./../../src/Psl/Dict/merge.php#L21)
 - [partition](./../../src/Psl/Dict/partition.php#L19)
 - [partition_with_key](./../../src/Psl/Dict/partition_with_key.php#L19)
 - [pull](./../../src/Psl/Dict/pull.php#L35)

docs/component/env.md

@@ -17,7 +17,7 @@
 - [current_exec](./../../src/Psl/Env/current_exec.php#L12)
 - [get_var](./../../src/Psl/Env/get_var.php#L18)
 - [get_vars](./../../src/Psl/Env/get_vars.php#L14)
-- [join_paths](./../../src/Psl/Env/join_paths.php#L16)
+- [join_paths](./../../src/Psl/Env/join_paths.php#L18)
 - [remove_var](./../../src/Psl/Env/remove_var.php#L18)
 - [set_current_dir](./../../src/Psl/Env/set_current_dir.php#L16)
 - [set_var](./../../src/Psl/Env/set_var.php#L19)

docs/component/iter.md

@@ -43,7 +43,7 @@
 - [map](./../../src/Psl/Iter/map.php#L35) ( deprecated )
 - [map_keys](./../../src/Psl/Iter/map_keys.php#L35) ( deprecated )
 - [map_with_key](./../../src/Psl/Iter/map_with_key.php#L33) ( deprecated )
-- [merge](./../../src/Psl/Iter/merge.php#L30) ( deprecated )
+- [merge](./../../src/Psl/Iter/merge.php#L32) ( deprecated )
 - [product](./../../src/Psl/Iter/product.php#L34) ( deprecated )
 - [pull](./../../src/Psl/Iter/pull.php#L40) ( deprecated )
 - [pull_with_key](./../../src/Psl/Iter/pull_with_key.php#L41) ( deprecated )

psalm.xml

@@ -59,6 +59,10 @@
         <RedundantCondition errorLevel="suppress"/>
         <RedundantCast errorLevel="suppress"/>
         <RedundantCastGivenDocblockType errorLevel="suppress"/>
+
+        <!-- Not using the result of pure functions is common within PSL -->
+        <!-- e.g: with and Psl\invariant_violations() -->
+        <UnusedFunctionCall errorLevel="suppress" />
     </issueHandlers>
 
     <plugins>

src/Psl/Arr/first.php

@@ -24,7 +24,6 @@
 function first(array $array)
 {
     /**
-     * @var Tk|null $first
      * @psalm-suppress DeprecatedFunction
      */
     $first = first_key($array);

src/Psl/Arr/firstx.php

@@ -28,7 +28,6 @@
 function firstx(array $array)
 {
     /**
-     * @var Tk|null $first
      * @psalm-suppress DeprecatedFunction
      */
     $first = first_key($array);

src/Psl/Arr/last.php

@@ -24,7 +24,6 @@
 function last(array $array)
 {
     /**
-     * @var Tk|null $last
      * @psalm-suppress DeprecatedFunction
      */
     $last = last_key($array);

src/Psl/Arr/lastx.php

@@ -28,7 +28,6 @@
 function lastx(array $array)
 {
     /**
-     * @var Tk|null $last
      * @psalm-suppress DeprecatedFunction
      */
     $last = last_key($array);

src/Psl/Arr/merge.php

@@ -28,6 +28,8 @@
  *
  * @deprecated use `Dict\merge` instead.
  * @see Dict\merge()
+ *
+ * @no-named-arguments
  */
 function merge(iterable $first, iterable ...$rest): array
 {

src/Psl/Collection/Map.php

@@ -378,8 +378,6 @@ public function zip(iterable $iterable): Map
         foreach ($this->elements as $k => $v) {
             /**
              * @psalm-suppress ImpureFunctionCall - conditionally pure
-             *
-             * @var Tu|null $u
              */
             $u = Iter\first($array);
             if (null === $u) {

src/Psl/Collection/MutableMap.php

@@ -372,7 +372,6 @@ public function zip(iterable $iterable): MutableMap
 
         foreach ($this->elements as $k => $v) {
             /**
-             * @var Tu|null $u
              * @psalm-suppress ImpureFunctionCall - conditionally pure
              */
             $u = Iter\first($array);

src/Psl/DataStructure/PriorityQueue.php

@@ -47,7 +47,6 @@ public function peek()
             return null;
         }
 
-        /** @var list<int> $keys */
         $keys = Vec\keys($this->queue);
 
         // Retrieve the highest priority.
@@ -133,7 +132,7 @@ private function drop(): void
     public function count(): int
     {
         $count = 0;
-        foreach ($this->queue as $priority => $list) {
+        foreach ($this->queue as $_priority => $list) {
             $count += Iter\count($list);
         }
 

src/Psl/Dict/count_values.php

@@ -29,7 +29,6 @@ function count_values(iterable $values): array
             gettype($value)
         );
 
-        /** @var int $count */
         $count = $result[$value] ?? 0;
         /** @var T $value */
         $result[$value] = $count + 1;

src/Psl/Dict/filter_with_key.php

@@ -35,10 +35,10 @@ function filter_with_key(iterable $iterable, ?callable $predicate = null): array
 {
     $predicate = $predicate ??
         /**
-         * @param Tk $k
+         * @param Tk $_k
          * @param Tv $v
          */
-        static fn ($k, $v): bool => Psl\Internal\boolean($v);
+        static fn ($_k, $v): bool => Psl\Internal\boolean($v);
 
     /** @var array<Tk, Tv> $result */
     $result = [];

src/Psl/Dict/merge.php

@@ -15,6 +15,8 @@
  * @param iterable<Tk, Tv> ...$rest
  *
  * @return array<Tk, Tv>
+ *
+ * @no-named-arguments
  */
 function merge(iterable $first, iterable ...$rest): array
 {

src/Psl/Dict/sort_by.php

@@ -45,9 +45,6 @@ function sort_by(iterable $iterable, callable $scalar_func, ?callable $comparato
         $tuples[$k] = [$scalar_func($v), $v];
     }
 
-    /**
-     * @var array<Tk, array{0: Ts, 1: Tv}> $sorted
-     */
     $sorted = namespace\sort($tuples, $tuple_comparator);
 
     /** @var array<Tk, Tv> $result */

src/Psl/Dict/unique_by.php

@@ -28,7 +28,6 @@ function unique_by(iterable $iterable, callable $scalar_func): array
     $original_values = [];
     foreach ($iterable as $k => $v) {
         $original_values[$k] = $v;
-        /** @var Ts $scalar */
         $scalar = $scalar_func($v);
 
         if (!Iter\contains($unique, $scalar)) {

src/Psl/Env/get_var.php

@@ -22,7 +22,6 @@ function get_var(string $key): ?string
         'Invalid environment variable key provided.'
     );
 
-    /** @var false|string $value */
     $value = getenv($key);
 
     return false === $value ? null : $value;

src/Psl/Env/join_paths.php

@@ -12,6 +12,8 @@
  * Joins a collection of paths appropriately for the PATH environment variable.
  *
  * @param string ...$paths
+ *
+ * @no-named-arguments
  */
 function join_paths(string ...$paths): string
 {

src/Psl/Hash/Context.php

@@ -87,7 +87,6 @@ public static function hmac(string $algorithm, string $key): Context
      */
     public function update(string $data): Context
     {
-        /** @var HashContext $internal_context */
         $internal_context = hash_copy($this->internalContext);
         hash_update($internal_context, $data);
 
@@ -101,7 +100,6 @@ public function update(string $data): Context
      */
     public function finalize(): string
     {
-        /** @var HashContext $internal_context */
         $internal_context = hash_copy($this->internalContext);
 
         return hash_final($internal_context, false);

src/Psl/Iter/contains_key.php

@@ -15,7 +15,7 @@
  */
 function contains_key(iterable $iterable, $key): bool
 {
-    foreach ($iterable as $k => $v) {
+    foreach ($iterable as $k => $_v) {
         if ($key === $k) {
             return true;
         }

src/Psl/Iter/count.php

@@ -33,7 +33,6 @@ function count(iterable $iterable): int
     }
 
     $count = 0;
-    /** @var T $_ */
     foreach ($iterable as $_) {
         ++$count;
     }

src/Psl/Iter/filter_with_key.php

@@ -41,12 +41,12 @@ function filter_with_key(iterable $iterable, ?callable $predicate = null): Itera
     return Iterator::from(static function () use ($iterable, $predicate): Generator {
         $predicate = $predicate ??
             /**
-             * @param Tk $k
+             * @param Tk $_k
              * @param Tv $v
              *
              * @return bool
              */
-            static fn ($k, $v) => Psl\Internal\boolean($v);
+            static fn ($_k, $v) => Psl\Internal\boolean($v);
 
         foreach ($iterable as $k => $v) {
             if ($predicate($k, $v)) {

src/Psl/Iter/merge.php

@@ -26,6 +26,8 @@
  *
  * @deprecated use `Dict\merge` instead.
  * @see Dict\merge()
+ *
+ * @no-named-arguments
  */
 function merge(iterable $first, iterable ...$rest): Iterator
 {

src/Psl/Iter/random.php

@@ -31,7 +31,6 @@ function random(iterable $iterable)
 
     Psl\invariant(0 !== $size, 'Expected a non-empty iterable.');
 
-    /** @var list<Tv> $shuffled */
     $shuffled = Vec\shuffle($values);
 
     if (1 === $size) {

src/Psl/Iter/reduce_keys.php

@@ -33,7 +33,7 @@
 function reduce_keys(iterable $iterable, callable $function, $initial = null)
 {
     $accumulator = $initial;
-    foreach ($iterable as $k => $v) {
+    foreach ($iterable as $k => $_v) {
         $accumulator = $function($accumulator, $k);
     }
 

src/Psl/Iter/zip.php

@@ -42,7 +42,6 @@ function zip(iterable ...$iterables): Iterator
             return;
         }
 
-        /** @var list<Iterator<Tk, Tv>> $iterators */
         $iterators = Vec\values(Dict\map(
             $iterables,
             /**
@@ -55,7 +54,6 @@ function zip(iterable ...$iterables): Iterator
 
         apply($iterators, static fn (Iterator $iterator) => $iterator->rewind());
         while (all($iterators, static fn (Iterator $iterator) => $iterator->valid())) {
-            /** @var list<Tk> $keys */
             $keys = Vec\values(Dict\map(
                 $iterators,
                 /**
@@ -66,7 +64,6 @@ function zip(iterable ...$iterables): Iterator
                 static fn (Iterator $iterator) => $iterator->key(),
             ));
 
-            /** @var list<Tv> $values */
             $values = Vec\values(Dict\map(
                 $iterators,
                 /**

src/Psl/Math/base_convert.php

@@ -49,15 +49,13 @@ function base_convert(string $value, int $from_base, int $to_base): string
     $from_alphabet = Byte\slice(Str\ALPHABET_ALPHANUMERIC, 0, $from_base);
     /** @var numeric-string $result_decimal */
     $result_decimal = '0';
-    /** @var numeric-string $place_value */
     $place_value = bcpow((string)$from_base, (string)(Byte\length($value) - 1));
-    /** @var string $digit */
     foreach (Byte\chunk($value) as $digit) {
+        Psl\invariant(is_numeric($place_value), 'Unexpected error.');
         $digit_numeric = Byte\search_ci($from_alphabet, $digit);
         Psl\invariant(null !== $digit_numeric, 'Invalid digit %s in base %d', $digit, $from_base);
         $result_decimal = bcadd($result_decimal, bcmul((string)$digit_numeric, $place_value));
         Psl\invariant(is_numeric($result_decimal), 'Unexpected error.');
-        /** @var numeric-string $place_value */
         $place_value = bcdiv($place_value, (string)$from_base);
     }
 

src/Psl/Math/from_base.php

@@ -36,7 +36,6 @@ function from_base(string $number, int $from_base): int
     /** @psalm-suppress MissingThrowsDocblock */
     $limit  = div(INT64_MAX, $from_base);
     $result = 0;
-    /** @var string $digit */
     foreach (Byte\chunk($number) as $digit) {
         $oval = Byte\ord($digit);
         // Branches sorted by guesstimated frequency of use. */

src/Psl/Math/maxva.php

@@ -22,7 +22,6 @@ function maxva($first, $second, ...$rest)
     $max = $first > $second ? $first : $second;
     foreach ($rest as $number) {
         if ($number > $max) {
-            /** @var T $max */
             $max = $number;
         }
     }

src/Psl/Math/median.php

@@ -10,13 +10,11 @@
 /**
  * Returns the median of the given numbers.
  *
- * @pslam-param iterable<int|float> $numbers
+ * @param iterable<int|float> $numbers
  */
 function median(iterable $numbers): ?float
 {
-    /** @var list<int|float> $numbers */
     $numbers = Vec\values($numbers);
-    /** @var list<int|float> $numbers */
     $numbers = Vec\sort($numbers);
     $count   = Iter\count($numbers);
     if (0 === $count) {

src/Psl/PseudoRandom/float.php

@@ -12,7 +12,6 @@
 function float(): float
 {
     /**
-     * @var float|int $result
      * @psalm-suppress MissingThrowsDocblock $max is always > than $min
      */
     $result = namespace\int(0, Math\INT53_MAX) / Math\INT53_MAX;

src/Psl/SecureRandom/float.php

@@ -14,7 +14,6 @@
 function float(): float
 {
     /**
-     * @var float|int $result
      * @psalm-suppress MissingThrowsDocblock
      */
     $result = namespace\int(0, Math\INT53_MAX) / Math\INT53_MAX;

src/Psl/Str/chr.php

@@ -26,7 +26,6 @@
  */
 function chr(int $codepoint, ?string $encoding = null): string
 {
-    /** @var string|false $char */
     $char = mb_chr($codepoint, Internal\internal_encoding($encoding));
 
     /** @psalm-suppress MissingThrowsDocblock */

src/Psl/Type/Internal/IntersectionType.php

@@ -77,7 +77,6 @@ public function coerce($value)
         }
 
         try {
-            /** @var Tl $value */
             $value = $this->left_type->coerce($value);
             /** @var Tl&Tr */
             return $this->right_type->assert($value);
@@ -86,7 +85,6 @@ public function coerce($value)
         }
 
         try {
-            /** @var Tr $value */
             $value = $this->right_type->coerce($value);
             /** @var Tr&Tl */
             return $this->left_type->assert($value);
@@ -109,7 +107,6 @@ public function coerce($value)
     public function assert($value)
     {
         try {
-            /** @var Tl $value */
             $value = $this->left_type->assert($value);
             /** @var Tl&Tr */
             return $this->right_type->assert($value);