Simplify LighterASTNode.toFirLightSourceElement

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/FirSourceChildren.kt

@@ -37,5 +37,5 @@ private fun FirPsiSourceElement<*>.getChild(types: Set<IElementType>, index: Int
 private fun FirLightSourceElement.getChild(types: Set<IElementType>, index: Int, depth: Int): FirSourceElement? {
     val visitor = LighterTreeElementFinderByType(treeStructure, types, index, depth)
 
-    return visitor.find(lighterASTNode)?.let { it.toFirLightSourceElement(it.startOffset, it.endOffset, treeStructure) }
+    return visitor.find(lighterASTNode)?.toFirLightSourceElement(treeStructure)
 }

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirModifierList.kt

@@ -76,11 +76,6 @@ val FirModifier<*>.lightNode: LighterASTNode? get() = (this as? FirLightModifier
 
 val FirModifier<*>.source: FirSourceElement?
     get() = when (this) {
-        is FirPsiModifier -> this.psi?.toFirPsiSourceElement()
-        is FirLightModifier -> {
-            // TODO pretty sure I got offsets wrong here
-            val startOffset = tree.getStartOffset(node)
-            val endOffset = tree.getEndOffset(node)
-            node.toFirLightSourceElement(startOffset, endOffset, tree)
-        }
+        is FirPsiModifier -> psi?.toFirPsiSourceElement()
+        is FirLightModifier -> node.toFirLightSourceElement(tree)
     }

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirAnnotationArgumentChecker.kt

@@ -243,7 +243,7 @@ object FirAnnotationArgumentChecker : FirBasicDeclarationChecker() {
             is FirLightSourceElement -> {
                 val elementOfParent = source.treeStructure.getParent(source.lighterASTNode) ?: source.lighterASTNode
 
-                elementOfParent.toFirLightSourceElement(elementOfParent.startOffset, elementOfParent.endOffset, source.treeStructure)
+                elementOfParent.toFirLightSourceElement(source.treeStructure)
             }
             else ->
                 source

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirExposedVisibilityDeclarationChecker.kt

@@ -236,7 +236,7 @@ object FirExposedVisibilityDeclarationChecker : FirMemberDeclarationChecker() {
             val kidsRef = Ref<Array<LighterASTNode?>>()
             this.treeStructure.getChildren(lighterASTNode, kidsRef)
             val identifier = kidsRef.get().find { it?.tokenType == KtTokens.IDENTIFIER }
-            identifier?.toFirLightSourceElement(this.treeStructure.getStartOffset(identifier), this.treeStructure.getEndOffset(identifier), this.treeStructure)
+            identifier?.toFirLightSourceElement(this.treeStructure)
         }
     }
 

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/converter/BaseConverter.kt

@@ -32,7 +32,7 @@ open class BaseConverter(
     override fun LighterASTNode.toFirSourceElement(kind: FirFakeSourceElementKind?): FirLightSourceElement {
         val startOffset = offset + tree.getStartOffset(this)
         val endOffset = offset + tree.getEndOffset(this)
-        return toFirLightSourceElement(startOffset, endOffset, tree, kind ?: FirRealSourceElementKind)
+        return toFirLightSourceElement(tree, kind ?: FirRealSourceElementKind, startOffset, endOffset)
     }
 
     override val LighterASTNode.elementType: IElementType

compiler/fir/raw-fir/light-tree2fir/src/org/jetbrains/kotlin/fir/lightTree/fir/ValueParameter.kt

@@ -46,8 +46,7 @@ class ValueParameter(
             val parameterSource = firValueParameter.source as? FirLightSourceElement
             val parameterNode = parameterSource?.lighterASTNode
             source = parameterNode?.toFirLightSourceElement(
-                parameterSource.startOffset, parameterSource.endOffset, parameterSource.treeStructure,
-                FirFakeSourceElementKind.PropertyFromParameter
+                parameterSource.treeStructure, FirFakeSourceElementKind.PropertyFromParameter
             )
             this.session = session
             origin = FirDeclarationOrigin.Source

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirSourceElement.kt

@@ -288,7 +288,8 @@ inline fun PsiElement.toFirPsiSourceElement(kind: FirSourceElementKind = FirReal
 
 @Suppress("NOTHING_TO_INLINE")
 inline fun LighterASTNode.toFirLightSourceElement(
-    startOffset: Int, endOffset: Int,
     tree: FlyweightCapableTreeStructure<LighterASTNode>,
-    kind: FirSourceElementKind = FirRealSourceElementKind
+    kind: FirSourceElementKind = FirRealSourceElementKind,
+    startOffset: Int = this.startOffset,
+    endOffset: Int = this.endOffset
 ): FirLightSourceElement = FirLightSourceElement(this, startOffset, endOffset, tree, kind)