Check for if expression ending with identifier during ambiguity check for semicolons

CHANGELOG.md

@@ -12,8 +12,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added option `block_newline_gaps` to determine whether newline gaps at the start / end of blocks should be preserved. Defaults to `Never`, which is the original behaviour. ([#857](https://github.com/JohnnyMorganz/StyLua/pull/857))
 
 ### Fixed
+
 - Fixed formatting of index containing brackets string in parentheses ([#992](https://github.com/JohnnyMorganz/StyLua/pull/992))
 - Fixed goto not being recognised for LuaJIT ([#986](https://github.com/JohnnyMorganz/StyLua/issues/986))
+- Fixed semicolon removed after a statement ending with an if-expression leading to ambiguous syntax when the next line begins with parentheses ([#1010](https://github.com/JohnnyMorganz/StyLua/issues/1010))
 
 ## [2.1.0] - 2025-04-21
 

src/formatters/block.rs

@@ -484,6 +484,10 @@ fn expression_ends_with_identifier_or_parentheses(expression: &Expression) -> bo
         Expression::UnaryOperator { expression, .. } => {
             expression_ends_with_identifier_or_parentheses(expression)
         }
+        #[cfg(feature = "luau")]
+        Expression::IfExpression(if_expression) => {
+            expression_ends_with_identifier_or_parentheses(if_expression.else_expression())
+        }
         _ => false,
     }
 }

tests/inputs-luau/ambiguous-syntax-1.lua

@@ -0,0 +1,3 @@
+-- https://github.com/JohnnyMorganz/StyLua/issues/1010
+(child :: BasePart).Size = if true then x else y;
+(child :: BasePart).CFrame = value

tests/snapshots/tests__luau@ambiguous-syntax-1.lua.snap

@@ -0,0 +1,8 @@
+---
+source: tests/tests.rs
+expression: "format(&contents, LuaVersion::Luau)"
+input_file: tests/inputs-luau/ambiguous-syntax-1.lua
+---
+-- https://github.com/JohnnyMorganz/StyLua/issues/1010
+(child :: BasePart).Size = if true then x else y;
+(child :: BasePart).CFrame = value