Special-cased =? operator to be excluded from parameter parser.

Restored capturing groups in parameter parser regex.

Author: Bilge

src/Internal/functions.php

@@ -11,16 +11,16 @@
     |
     # Unnamed parameters.
     (
-        \$(?:\d+)
+        \$(\d+)
         |
         # Match all question marks except those surrounded by "operator"-class characters on either side.
-        (?<!(?<operators>[-+\\*/<>=~!@#%^&|`?]))
+        (?<!(?<operators>[-+\\*/<>~!@#%^&|`?]))
         \?
-        (?!\g<operators>)
+        (?!\g<operators>|=)
     )
     |
     # Named parameters.
-    (?<!:):(?:[a-zA-Z_][a-zA-Z0-9_]*)
+    (?<!:):([a-zA-Z_][a-zA-Z0-9_]*)
 ]msxS
 REGEX;
 
@@ -37,7 +37,7 @@ function parseNamedParams(string $sql, ?array &$names): string
         static $index = 0, $unnamed = 0, $numbered = 1;
 
         if (isset($matches[4])) {
-            $names[$index] = $matches[4];
+            $names[$index] = $matches[5];
         } elseif ($matches[2] === '?') {
             $names[$index] = $unnamed++;
         } else {

test/InternalFunctionsTest.php

@@ -25,6 +25,8 @@ public function provideUnnamedParams(): iterable
             'Bare' => ['SELECT ?', 'SELECT $1'],
             'Parenthesized' => ['SELECT (?)', 'SELECT ($1)'],
             'Row constructor' => ['SELECT (?, ?)', 'SELECT ($1, $2)'],
+            // Special-case exclude the =? operator to permit the following usage.
+            '=? operator' => ['UPDATE foo SET bar=?', 'UPDATE foo SET bar=$1']
         ];
     }