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[JS IR] Support generating JS expression from IrComposite

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Except the case when it's empty.
This commit is contained in:
Zalim Bashorov
2020-12-08 16:51:16 +03:00
parent 72593e3d30
commit 274b09cf36
1 changed files with 16 additions and 1 deletions
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compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/IrElementToJsExpressionTransformer.kt
+16 -1
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@@ -7,7 +7,10 @@ package org.jetbrains.kotlin.ir.backend.js.transformers.irToJs
import org.jetbrains.kotlin.backend.common.ir.isElseBranch
import org.jetbrains.kotlin.descriptors.ClassKind
import org.jetbrains.kotlin.ir.backend.js.utils.*
import org.jetbrains.kotlin.ir.backend.js.utils.JsGenerationContext
import org.jetbrains.kotlin.ir.backend.js.utils.Namer
import org.jetbrains.kotlin.ir.backend.js.utils.emptyScope
import org.jetbrains.kotlin.ir.backend.js.utils.getJsNameOrKotlinName
import org.jetbrains.kotlin.ir.declarations.IrClass
import org.jetbrains.kotlin.ir.declarations.IrConstructor
import org.jetbrains.kotlin.ir.declarations.IrSimpleFunction
@@ -20,6 +23,18 @@ import org.jetbrains.kotlin.js.backend.ast.*
@Suppress("PARAMETER_NAME_CHANGED_ON_OVERRIDE")
class IrElementToJsExpressionTransformer : BaseIrElementToJsNodeTransformer<JsExpression, JsGenerationContext> {
override fun visitComposite(expression: IrComposite, data: JsGenerationContext): JsExpression {
val size = expression.statements.size
if (size == 0) TODO("Empty IrComposite is not supported")
val first = expression.statements[0].accept(this, data)
if (size == 1) return first
return expression.statements.fold(first) { left, right ->
JsBinaryOperation(JsBinaryOperator.COMMA, left, right.accept(this, data))
}
}
override fun visitVararg(expression: IrVararg, context: JsGenerationContext): JsExpression {
assert(expression.elements.none { it is IrSpreadElement })
return JsArrayLiteral(expression.elements.map { it.accept(this, context) })