patch 8.2.2209: Vim9: return type of => lambda not parsed
Problem: Vim9: return type of => lambda not parsed.
Solution: Parse and use the return type.
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index f79c1f6..c481729 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1951,7 +1951,7 @@
assert_equal([1, 3, 5], res)
# Lambda returning a dict
- var Lmb = () => {key: 42}
+ var Lmb = () => ({key: 42})
assert_equal({key: 42}, Lmb())
END
CheckDefSuccess(lines)
@@ -1960,11 +1960,16 @@
CheckDefFailure(["var Ref = (a)=> a + 1"], 'E1001:')
CheckDefFailure(["var Ref = (a) =>a + 1"], 'E1001:')
+ CheckDefSuccess(["var Ref: func(number): string = (a: number): string => 'x'"])
+ CheckDefSuccess(["var Ref: func(number): any = (a: number): any => 'x'"])
+ CheckDefFailure(["var Ref: func(number): number = (a: number): string => 'x'"], 'E1012:')
+ CheckDefFailure(["var Ref: func(number): string = (a: number): string => 99"], 'E1012:')
+
CheckDefFailure(["filter([1, 2], (k,v) => 1)"], 'E1069:', 1)
# error is in first line of the lambda
CheckDefFailure(["var L = (a) -> a + b"], 'E1001:', 1)
-# TODO: lambda after -> doesn't work yet
+# TODO: ->(lambda)() doesn't work yet
# assert_equal('xxxyyy', 'xxx'->((a, b) => a .. b)('yyy'))
# CheckDefExecFailure(["var s = 'asdf'->{a -> a}('x')"],
@@ -1973,9 +1978,9 @@
# 'E1106: 2 arguments too many')
# CheckDefFailure(["echo 'asdf'->{a -> a}(x)"], 'E1001:', 1)
- CheckDefSuccess(['var Fx = (a) => {k1: 0,', ' k2: 1}'])
- CheckDefFailure(['var Fx = (a) => {k1: 0', ' k2: 1}'], 'E722:', 2)
- CheckDefFailure(['var Fx = (a) => {k1: 0,', ' k2 1}'], 'E720:', 2)
+ CheckDefSuccess(['var Fx = (a) => ({k1: 0,', ' k2: 1})'])
+ CheckDefFailure(['var Fx = (a) => ({k1: 0', ' k2: 1})'], 'E722:', 2)
+ CheckDefFailure(['var Fx = (a) => ({k1: 0,', ' k2 1})'], 'E720:', 2)
CheckDefSuccess(['var Fx = (a) => [0,', ' 1]'])
CheckDefFailure(['var Fx = (a) => [0', ' 1]'], 'E696:', 2)