checker: check number of fields in short struct inits (#6280)

vlib/v/checker/checker.v

@@ -411,8 +411,14 @@ pub fn (mut c Checker) struct_init(mut struct_init ast.StructInit) table.Type {
 			} else {
 				info = type_sym.info as table.Struct
 			}
-			if struct_init.is_short && struct_init.fields.len > info.fields.len {
+			if struct_init.is_short {
-				c.error('too many fields', struct_init.pos)
+				exp_len := info.fields.len
+				got_len := struct_init.fields.len
+				if exp_len != got_len {
+					amount := if exp_len < got_len { 'many' } else { 'few' }
+					c.error('too $amount fields in `$type_sym.source_name` literal (expecting $exp_len, got $got_len)',
+						struct_init.pos)
+				}
 			}
 			mut inited_fields := []string{}
 			for i, field in struct_init.fields {

vlib/v/checker/tests/short_struct_too_many.out

@@ -1,7 +0,0 @@
-vlib/v/checker/tests/short_struct_too_many.vv:6:7: error: too many fields
-    4 |
-    5 | fn main() {
-    6 |     t := Test{true, false}
-      |          ~~~~~~~~~~~~~~~~~
-    7 |     _ = t
-    8 | }

vlib/v/checker/tests/short_struct_too_many.vv

@@ -1,8 +0,0 @@
-struct Test {
-	foo bool
-}
-
-fn main() {
-	t := Test{true, false}
-	_ = t
-}

vlib/v/checker/tests/short_struct_wrong_number.out

@@ -0,0 +1,13 @@
+vlib/v/checker/tests/short_struct_wrong_number.vv:7:6: error: too few fields in `Test` literal (expecting 2, got 1)
+    5 |
+    6 | fn main() {
+    7 |     _ = Test{true}
+      |         ~~~~~~~~~~
+    8 |     _ = Test{true, false, true}
+    9 | }
+vlib/v/checker/tests/short_struct_wrong_number.vv:8:6: error: too many fields in `Test` literal (expecting 2, got 3)
+    6 | fn main() {
+    7 |     _ = Test{true}
+    8 |     _ = Test{true, false, true}
+      |         ~~~~~~~~~~~~~~~~~~~~~~~
+    9 | }

vlib/v/checker/tests/short_struct_wrong_number.vv

@@ -0,0 +1,9 @@
+struct Test {
+	foo bool
+	bar bool
+}
+
+fn main() {
+	_ = Test{true}
+	_ = Test{true, false, true}
+}

vlib/v/checker/tests/unknown_method_suggest_name.out

@@ -1,15 +1,15 @@
-vlib/v/checker/tests/unknown_method_suggest_name.vv:7:2: error: unknown type `hash.crc32.Crc33`.
+vlib/v/checker/tests/unknown_method_suggest_name.vv:13:2: error: unknown type `hash.crc32.Crc33`.
 Did you mean `crc32.Crc32`?
-    5 |     y   int
+   11 |     y int
-    6 |     z   int
+   12 |     z int
-    7 |     ccc crc32.Crc33
+   13 |     ccc crc32.Crc33
       |     ~~~~~~~~~~~~~~~
-    8 | }
+   14 | }
-    9 |
+   15 |
 vlib/v/checker/tests/unknown_method_suggest_name.vv:27:9: error: unknown method: `Point.tranzlate`.
 Did you mean `translate`?
    25 |     p := Point{1, 2, 3}
-   26 |     v := Vector{5, 5, 10}
+   26 |     v := Vector{x: 5, y: 5, z: 10}
    27 |     z := p.tranzlate(v)
       |            ~~~~~~~~~~~~
    28 |     println('p: $p')

vlib/v/checker/tests/unknown_method_suggest_name.vv

@@ -4,13 +4,13 @@ struct Point {
 	x   int
 	y   int
 	z   int
-	ccc crc32.Crc33
 }
 
 struct Vector {
 	x int
 	y int
 	z int
+	ccc crc32.Crc33
 }
 
 fn (p Point) translate(v Vector) Point {
@@ -23,7 +23,7 @@ fn (p Point) identity() Point {
 
 fn main() {
 	p := Point{1, 2, 3}
-	v := Vector{5, 5, 10}
+	v := Vector{x: 5, y: 5, z: 10}
 	z := p.tranzlate(v)
 	println('p: $p')
 	println('v: $v')

vlib/x/net/udp.v

@@ -32,7 +32,7 @@ pub fn dial_udp(laddr, raddr string) ?UdpConn {
 	}
 
 	return UdpConn {
-		sock
+		sock: sock
 	}
 }