checker: fix return static method name (fix #26105) (#26110)

Author: kbkpbot

vlib/v/checker/return.v

@@ -321,7 +321,12 @@ fn (mut c Checker) return_stmt(mut node ast.Return) {
 		expr0 := node.exprs[0]
 		if expr0 is ast.CallExpr {
 			if expr0.or_block.kind == .propagate_option && node.exprs.len == 1 {
-				c.error('`?` is not needed, use `return ${expr0.name}()`', expr0.pos)
+				v_name := if expr0.is_static_method {
+					expr0.name.all_before('__static__') + '.' + expr0.name.all_after('__static__')
+				} else {
+					expr0.name
+				}
+				c.error('`?` is not needed, use `return ${v_name}()`', expr0.pos)
 			}
 		}
 	}

vlib/v/checker/tests/return_static_name.out

@@ -0,0 +1,7 @@
+vlib/v/checker/tests/return_static_name.vv:29:9: error: `?` is not needed, use `return Boolean.from_bytes1()`
+   27 | 
+   28 | fn parse_universal_primitive1(content []u8) ?Element {
+   29 |     return Boolean.from_bytes1(content)?
+      |            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+   30 | }
+   31 |

vlib/v/checker/tests/return_static_name.vv

@@ -0,0 +1,34 @@
+module main
+
+pub struct Boolean {
+mut:
+	value u8
+}
+
+fn (b Boolean) payload() ![]u8 {
+	return []u8{}
+}
+
+fn Boolean.from_bytes(bytes []u8) !Boolean {
+	return Boolean{}
+}
+
+fn Boolean.from_bytes1(bytes []u8) ?Boolean {
+	return Boolean{}
+}
+
+pub interface Element {
+	payload() ![]u8
+}
+
+fn parse_universal_primitive(content []u8) !Element {
+	return Boolean.from_bytes(content)!
+}
+
+fn parse_universal_primitive1(content []u8) ?Element {
+	return Boolean.from_bytes1(content)?
+}
+
+fn main() {
+	println(parse_universal_primitive1([u8(1)])?)
+}