PHPLIB-1694 Support regular expressions in $replaceAll search string and $split delimiter

generator/config/expression/replaceAll.yaml

@@ -21,6 +21,7 @@ arguments:
         type:
             - resolvesToString
             - resolvesToNull
+            - resolvesToRegex
         description: |
             The string to search for within the given input. Can be any valid expression that resolves to a string or a null. If find refers to a field that is missing, $replaceAll returns null.
     -
@@ -42,3 +43,13 @@ tests:
                             input: '$item'
                             find: 'blue paint'
                             replacement: 'red paint'
+    -
+        name: 'Support regex search string'
+        pipeline:
+            -
+                $project:
+                    item:
+                        $replaceAll:
+                            input: '123-456-7890'
+                            find: !bson_regex '\d{3}'
+                            replacement: 'xxx'

generator/config/expression/split.yaml

@@ -17,6 +17,7 @@ arguments:
         name: delimiter
         type:
             - resolvesToString
+            - resolvesToRegex
         description: |
             The delimiter to use when splitting the string expression. delimiter can be any valid expression as long as it resolves to a string.
 tests:
@@ -46,3 +47,12 @@ tests:
             -
                 $sort:
                     total_qty: -1
+    -
+        name: 'Support regex delimiter'
+        pipeline:
+            -
+                $project:
+                    split:
+                        $split:
+                            - 'abc'
+                            - !bson_regex 'b'

tests/Builder/Expression/ReplaceAllOperatorTest.php

@@ -4,6 +4,7 @@
 
 namespace MongoDB\Tests\Builder\Expression;
 
+use MongoDB\BSON\Regex;
 use MongoDB\Builder\Expression;
 use MongoDB\Builder\Pipeline;
 use MongoDB\Builder\Stage;
@@ -28,4 +29,19 @@ public function testExample(): void
 
         $this->assertSamePipeline(Pipelines::ReplaceAllExample, $pipeline);
     }
+
+    public function testSupportRegexSearchString(): void
+    {
+        $pipeline = new Pipeline(
+            Stage::project(
+                item: Expression::replaceAll(
+                    input: '123-456-7890',
+                    find: new Regex('\d{3}'),
+                    replacement: 'xxx',
+                ),
+            ),
+        );
+
+        $this->assertSamePipeline(Pipelines::ReplaceAllSupportRegexSearchString, $pipeline);
+    }
 }

tests/Builder/Expression/SplitOperatorTest.php

@@ -50,4 +50,18 @@ public function testExample(): void
 
         $this->assertSamePipeline(Pipelines::SplitExample, $pipeline);
     }
+
+    public function testSupportRegexDelimiter(): void
+    {
+        $pipeline = new Pipeline(
+            Stage::project(
+                split: Expression::split(
+                    string: 'abc',
+                    delimiter: new Regex('b'),
+                ),
+            ),
+        );
+
+        $this->assertSamePipeline(Pipelines::SplitSupportRegexDelimiter, $pipeline);
+    }
 }