From e2d38815162ec66bd55ed8f16dd51ae1b8ec9eae Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipensp@gmail.com>
Date: Sun, 1 Dec 2024 14:21:10 -0300
Subject: [PATCH] checker, cgen: fix array.delete_many() codegen (fix #23024)
 (#23025)

---
 vlib/v/checker/fn.v                             | 13 +++++++++++++
 vlib/v/gen/c/fn.v                               |  6 +++++-
 .../builtin_arrays/array_delete_many_test.v     | 17 +++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/tests/builtin_arrays/array_delete_many_test.v

diff --git a/vlib/v/checker/fn.v b/vlib/v/checker/fn.v
index 33901bbab..b87aa24ac 100644
--- a/vlib/v/checker/fn.v
+++ b/vlib/v/checker/fn.v
@@ -3637,6 +3637,19 @@ fn (mut c Checker) array_builtin_method_call(mut node ast.CallExpr, left_type as
 			}
 		}
 		node.return_type = ast.void_type
+	} else if method_name == 'delete_many' {
+		if node.args.len != 2 {
+			c.error('`.delete_many()` expected 2 arguments, but got ${node.args.len}',
+				node.pos)
+		} else {
+			for i, mut arg in node.args {
+				arg_typ := c.expr(mut arg.expr)
+				c.check_expected_call_arg(arg_typ, ast.int_type, node.language, arg) or {
+					c.error('${err.msg()} in argument ${i + 1} to `.delete_many()`', arg.pos)
+				}
+			}
+		}
+		node.return_type = ast.void_type
 	} else if method_name == 'reverse' {
 		c.table.used_features.arr_reverse = true
 	}
diff --git a/vlib/v/gen/c/fn.v b/vlib/v/gen/c/fn.v
index 0f7522ed1..d2f3eb59b 100644
--- a/vlib/v/gen/c/fn.v
+++ b/vlib/v/gen/c/fn.v
@@ -1150,12 +1150,16 @@ fn (mut g Gen) gen_array_method_call(node ast.CallExpr, left_type ast.Type, left
 		'all' {
 			g.gen_array_all(node)
 		}
-		'delete', 'drop', 'delete_last' {
+		'delete', 'drop', 'delete_last', 'delete_many' {
 			g.write('array_${node.name}(')
 			g.gen_arg_from_type(left_type, node.left)
 			if node.name != 'delete_last' {
 				g.write(', ')
 				g.expr(node.args[0].expr)
+				if node.name == 'delete_many' {
+					g.write(', ')
+					g.expr(node.args[1].expr)
+				}
 			}
 			g.write(')')
 		}
diff --git a/vlib/v/tests/builtin_arrays/array_delete_many_test.v b/vlib/v/tests/builtin_arrays/array_delete_many_test.v
new file mode 100644
index 000000000..24ce31e82
--- /dev/null
+++ b/vlib/v/tests/builtin_arrays/array_delete_many_test.v
@@ -0,0 +1,17 @@
+struct Test[T] {
+mut:
+	values []T
+}
+
+fn (mut t Test[T]) delete_many(start int, end int) {
+	t.values.delete_many(start, end)
+}
+
+fn test_main() {
+	mut x := Test[int]{}
+	x.values = []int{len: 5, init: index}
+	x.delete_many(1, 3)
+	assert x.values.len == 2
+	assert x.values[0] == 0
+	assert x.values[1] == 4
+}
-- 
2.39.5