From 3327fd23d05c805267dbbb5c6af13752dcc42521 Mon Sep 17 00:00:00 2001
From: Adam Oates <31167933+islonely@users.noreply.github.com>
Date: Sun, 24 Sep 2023 04:19:29 +0000
Subject: [PATCH 1/4] parser, checker: allow lambda anywhere fn expected

---
 vlib/v/checker/lambda_expr.v | 5 -----
 vlib/v/parser/expr.v         | 4 +---
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/vlib/v/checker/lambda_expr.v b/vlib/v/checker/lambda_expr.v
index 20c77fb520e736..246b5d7cb5e609 100644
--- a/vlib/v/checker/lambda_expr.v
+++ b/vlib/v/checker/lambda_expr.v
@@ -7,11 +7,6 @@ pub fn (mut c Checker) lambda_expr(mut node ast.LambdaExpr, exp_typ ast.Type) as
 	if node.is_checked {
 		return node.typ
 	}
-	if !c.inside_fn_arg {
-		c.error('lambda expressions are allowed only inside function or method callsites',
-			node.pos)
-		return ast.void_type
-	}
 	if exp_typ == 0 {
 		c.error('lambda expressions are allowed only in places expecting function callbacks',
 			node.pos)
diff --git a/vlib/v/parser/expr.v b/vlib/v/parser/expr.v
index 4c93f8773edf76..9645681855e5c1 100644
--- a/vlib/v/parser/expr.v
+++ b/vlib/v/parser/expr.v
@@ -837,9 +837,7 @@ fn (mut p Parser) process_custom_orm_operators() {
 }
 
 fn (mut p Parser) lambda_expr() ?ast.LambdaExpr {
-	if !p.inside_call_args {
-		return none
-	}
+	
 
 	// a) `f(||expr)` for a callback lambda expression with 0 arguments
 	// b) `f(|a_1,...,a_n| expr_with_a_1_etc_till_a_n)` for a callback with several arguments

From 3a1c7820f900cc26f262d7a26239e3509a7cd9d8 Mon Sep 17 00:00:00 2001
From: Adam Oates <31167933+islonely@users.noreply.github.com>
Date: Sun, 24 Sep 2023 04:42:17 +0000
Subject: [PATCH 2/4] add test

---
 vlib/v/tests/lambda_as_struct_field_value_test.v | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 vlib/v/tests/lambda_as_struct_field_value_test.v

diff --git a/vlib/v/tests/lambda_as_struct_field_value_test.v b/vlib/v/tests/lambda_as_struct_field_value_test.v
new file mode 100644
index 00000000000000..c2765c03df57ff
--- /dev/null
+++ b/vlib/v/tests/lambda_as_struct_field_value_test.v
@@ -0,0 +1,10 @@
+struct Foo {
+	sum fn(int, int) int
+}
+
+fn test_lambda_as_struct_field_value() {
+	foo := Foo{
+		sum: |x, y| x + y
+	}
+	assert foo.sum(6, 6) == 12
+}
\ No newline at end of file

From 2102c46adfb3b0cd70b4be0414e31e09028180ca Mon Sep 17 00:00:00 2001
From: Adam Oates <31167933+islonely@users.noreply.github.com>
Date: Mon, 25 Sep 2023 01:36:23 +0000
Subject: [PATCH 3/4] tests: vfmt

---
 vlib/v/tests/lambda_as_struct_field_value_test.v | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vlib/v/tests/lambda_as_struct_field_value_test.v b/vlib/v/tests/lambda_as_struct_field_value_test.v
index c2765c03df57ff..712e438c94c08f 100644
--- a/vlib/v/tests/lambda_as_struct_field_value_test.v
+++ b/vlib/v/tests/lambda_as_struct_field_value_test.v
@@ -1,5 +1,5 @@
 struct Foo {
-	sum fn(int, int) int
+	sum fn (int, int) int
 }
 
 fn test_lambda_as_struct_field_value() {
@@ -7,4 +7,4 @@ fn test_lambda_as_struct_field_value() {
 		sum: |x, y| x + y
 	}
 	assert foo.sum(6, 6) == 12
-}
\ No newline at end of file
+}

From 194d434346519536913c375ba19b2b9700db16d0 Mon Sep 17 00:00:00 2001
From: Adam Oates <31167933+islonely@users.noreply.github.com>
Date: Mon, 25 Sep 2023 01:51:23 +0000
Subject: [PATCH 4/4] parser: vfmt expr.v

---
 vlib/v/parser/expr.v | 2 --
 1 file changed, 2 deletions(-)

diff --git a/vlib/v/parser/expr.v b/vlib/v/parser/expr.v
index 9645681855e5c1..ba69499a54dbcb 100644
--- a/vlib/v/parser/expr.v
+++ b/vlib/v/parser/expr.v
@@ -837,8 +837,6 @@ fn (mut p Parser) process_custom_orm_operators() {
 }
 
 fn (mut p Parser) lambda_expr() ?ast.LambdaExpr {
-	
-
 	// a) `f(||expr)` for a callback lambda expression with 0 arguments
 	// b) `f(|a_1,...,a_n| expr_with_a_1_etc_till_a_n)` for a callback with several arguments
 	if !(p.tok.kind == .logical_or