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feat: support non-indented cases in Scala3 match expression #436

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feat: support non-indented cases in Scala3 match expression #436

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0151e94
feat: support non-indented cases in Scala3 match expression
susliko Nov 25, 2024
0a1ff8c
Merge branch 'master' into non-indented-match-cases
eed3si9n Nov 25, 2024
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4 changes: 4 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -38,3 +38,7 @@ dist/
*.tar.gz
*.tgz
*.zip

# scala-cli
.scala-build
.bsp
7 changes: 6 additions & 1 deletion grammar.js
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Expand Up @@ -95,6 +95,8 @@ module.exports = grammar({
[$._if_condition, $._simple_expression],
// _postfix_expression_choice ':' '(' wildcard • ':' …
[$.binding, $._simple_type],
// expression 'match' 'case' _case_pattern ';' _automatic_semicolon expression • 'match' …
[$.match_expression, $._block],
],

word: $ => $._alpha_identifier,
Expand Down Expand Up @@ -806,6 +808,9 @@ module.exports = grammar({
indented_cases: $ =>
prec.left(seq($._indent, repeat1($.case_clause), $._outdent)),

non_indented_cases: $ =>
prec.right(sep1($._automatic_semicolon, $.case_clause)),

_indented_type_cases: $ =>
prec.left(seq($._indent, repeat1($.type_case_clause), $._outdent)),

Expand Down Expand Up @@ -1157,7 +1162,7 @@ module.exports = grammar({
optional($.inline_modifier),
field("value", $.expression),
"match",
field("body", choice($.case_block, $.indented_cases)),
field("body", choice($.case_block, $.indented_cases, $.non_indented_cases)),
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Should non_indented_cases be aliased to indented_cases here to preserve compatibility for any queries that may not expect nodes other than case_block/indented_cases, wdyt?

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+1 to this.

),

try_expression: $ =>
Expand Down
36 changes: 26 additions & 10 deletions test/corpus/expressions.txt
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Expand Up @@ -689,12 +689,12 @@ def matchTest(x: Int): String = x match {
case 3 => {
"3"
}
case 4 =>
case 4 =>
;
case A if a == 1 =>
case A if a == 2 => 2
case ((i, _)) => i
case s"$l1 -- $l2" =>
case s"$l1 -- $l2" =>
l1 + l2
case _ =>
val x = "many"
Expand Down Expand Up @@ -791,6 +791,10 @@ def matchTest(x: Int): String =
case _ =>
val x = "many"
"more"
y match
case 0 => "zero"
case 1 => "one"
case _ => "idk"

--------------------------------------------------------------------------------

Expand Down Expand Up @@ -837,6 +841,18 @@ def matchTest(x: Int): String =
(val_definition
(identifier)
(string))
(string))))
(match_expression
(identifier)
(non_indented_cases
(case_clause
(integer_literal)
(string))
(case_clause
(integer_literal)
(string))
(case_clause
(wildcard)
(string)))))))

================================================================================
Expand All @@ -850,8 +866,8 @@ class C {
a
.b
// comment1
/*
comment2
/*
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@susliko susliko Nov 25, 2024 •
edited
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Changes here and below are caused by changes in the behavior of tree-sitter test -u, which now removes trailing spaces

comment2
*/
.c
}
Expand Down Expand Up @@ -1105,11 +1121,11 @@ object O {
val l = a => a + 1
val b = (x: Int, y: Int) => { x * y }
val f = _ => 2
foo { i =>
val x = 2 + i
foo { i =>
val x = 2 + i
x
}
{ x =>
{ x =>
val y = 2 * x
y * y
}
Expand Down Expand Up @@ -1223,7 +1239,7 @@ Unit expressions
================================================================================

val x = ()
def f(): Unit = { (
def f(): Unit = { (
); }

--------------------------------------------------------------------------------
Expand Down Expand Up @@ -1649,9 +1665,9 @@ class A:
Inline matches (Scala 3)
================================================================================

def hello =
def hello =
inline c match {
case 1 =>
case 1 =>
}

--------------------------------------------------------------------------------
Expand Down
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