| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.compose.plugins.kotlin.compiler.lower |
| |
| import androidx.compose.plugins.kotlin.ComposeFqNames |
| import org.jetbrains.kotlin.backend.common.FileLoweringPass |
| import org.jetbrains.kotlin.backend.common.extensions.IrPluginContext |
| import org.jetbrains.kotlin.ir.declarations.IrFile |
| import org.jetbrains.kotlin.ir.declarations.IrModuleFragment |
| import org.jetbrains.kotlin.ir.expressions.IrCall |
| import org.jetbrains.kotlin.ir.expressions.IrExpression |
| import org.jetbrains.kotlin.ir.util.dump |
| import org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid |
| import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid |
| import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe |
| |
| class ComposerIntrinsicTransformer(val context: IrPluginContext) : |
| IrElementTransformerVoid(), |
| FileLoweringPass, |
| ModuleLoweringPass { |
| |
| override fun lower(module: IrModuleFragment) { |
| module.transformChildrenVoid(this) |
| } |
| |
| override fun lower(irFile: IrFile) { |
| irFile.transformChildrenVoid(this) |
| } |
| |
| override fun visitCall(expression: IrCall): IrExpression { |
| @Suppress("DEPRECATION") |
| if (expression.symbol.descriptor.fqNameSafe == ComposeFqNames.CurrentComposerIntrinsic) { |
| // since this call was transformed by the ComposerParamTransformer, the first argument |
| // to this call is the composer itself. We just replace this expression with the |
| // argument expression and we are good. |
| val expectedArgumentsCount = 1 + // composer parameter |
| 1 + // key parameter |
| 1 // changed parameter |
| assert(expression.valueArgumentsCount == expectedArgumentsCount) { |
| expression.dump() |
| } |
| val composerExpr = expression.getValueArgument(0) |
| if (composerExpr == null) error("Expected non-null composer argument") |
| return composerExpr |
| } |
| return super.visitCall(expression) |
| } |
| } |