From 262e9b1e867ad30ff2cd433160b879d5ec4b3769 Mon Sep 17 00:00:00 2001
From: Robert Jackson <rjackson@linkedin.com>
Date: Fri, 8 Sep 2023 16:02:29 -0400
Subject: [PATCH] fix(scala): Mark (lambda_expression) without bindings as
 @defintition.parameters
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When you have a lambda expression like:

```scala
val fruits = List("apple", "banana", "avocado", "papaya")

val countsToFruits = fruits.groupBy(fruit => fruit.count(_ == 'a'))

for ((count, fruits) <- countsToFruits) {
  println(s"with (fruits) 'a' × $count = $fruits")
}
```

The `fruit => fruit.count(_ == 'a')` lambda expression (note: without
wrapping parenthesis) does not create a `(binding)` node. Its syntax
tree is:

```
    (lambda_expression) ; [5:18 - 47]
     parameters: (identifier) ; [5:18 - 22]
     (call_expression) ; [5:27 - 47]
      function: (field_expression) ; [5:27 - 37]
       value: (identifier) ; [5:27 - 31]
       field: (identifier) ; [5:33 - 37]
      arguments: (arguments) ; [5:38 - 47]
       (infix_expression) ; [5:39 - 46]
        left: (wildcard) ; [5:39 - 39]
        operator: (operator_identifier) ; [5:41 - 42]
        right: (character_literal) ; [5:44 - 46]
```

That example just _happens_ to be **exactly** one of the example from
https://www.scala-lang.org/ ([see
playground](https://scastie.scala-lang.org/S0bkCiXkQiuOMXnlhWn46g)) 😁.
---
 queries/scala/locals.scm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/queries/scala/locals.scm b/queries/scala/locals.scm
index dc19c7aa4..044923f17 100644
--- a/queries/scala/locals.scm
+++ b/queries/scala/locals.scm
@@ -25,6 +25,9 @@
 (class_parameter
   name: (identifier) @definition.parameter)
 
+(lambda_expression
+  parameters: (identifier) @definition.var)
+
 (binding
   name: (identifier) @definition.var)