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Comments (1)

psalm-github-bot avatar psalm-github-bot commented on June 25, 2024

I found these snippets:

https://psalm.dev/r/448c9d0bef
<?php

/**
 * @var 'hello'|'world' $a
 * @var 'foo'|'bar' $b
 * @var 'x'|'y' $c
 */

$x = $a . $b . $c;
/** @psalm-trace $x */;

$y = "hello {$a} world";
/** @psalm-trace $y */;

$z = "{$a}{$b}{$c}";
/** @psalm-trace $z */;
Psalm output (using commit 08afc45):

INFO: Trace - 10:23 - $x: 'hellobarx'|'hellobary'|'hellofoox'|'hellofooy'|'worldbarx'|'worldbary'|'worldfoox'|'worldfooy'

INFO: Trace - 13:23 - $y: non-empty-literal-string

INFO: Trace - 16:23 - $z: non-empty-literal-string

INFO: UnusedVariable - 9:1 - $x is never referenced or the value is not used

INFO: UnusedVariable - 12:1 - $y is never referenced or the value is not used

INFO: UnusedVariable - 15:1 - $z is never referenced or the value is not used

from psalm.

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