99 lines
2.8 KiB
Kotlin
99 lines
2.8 KiB
Kotlin
/*
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* Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package net.sergeych.lyng
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import net.sergeych.lyng.obj.Obj
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import net.sergeych.lyng.obj.ObjClass
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import net.sergeych.lyng.obj.ObjVoid
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fun String.toSource(name: String = "eval"): Source = Source(name, this)
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sealed class ObjType {
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object Any : ObjType()
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object Void: ObjType()
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companion object {
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}
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}
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@Suppress("unused")
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abstract class Statement(
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val isStaticConst: Boolean = false,
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override val isConst: Boolean = false,
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val returnType: ObjType = ObjType.Any
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) : Obj() {
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override val objClass: ObjClass = type
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abstract val pos: Pos
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abstract suspend fun execute(scope: Scope): Obj
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override suspend fun compareTo(scope: Scope, other: Obj): Int {
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if( other === this ) return 0
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return -3
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}
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override suspend fun callOn(scope: Scope): Obj {
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return execute(scope)
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}
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override fun toString(): String = "Callable@${this.hashCode()}"
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companion object {
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val type = ObjClass("Callable")
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}
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suspend fun call(scope: Scope, vararg args: Obj) = execute(scope.createChildScope(args = Arguments(*args)))
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}
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class ExpressionStatement(
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val ref: net.sergeych.lyng.obj.ObjRef,
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override val pos: Pos
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) : Statement() {
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override suspend fun execute(scope: Scope): Obj = ref.evalValue(scope)
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}
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fun Statement.raise(text: String): Nothing {
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throw ScriptError(pos, text)
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}
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@Suppress("unused")
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fun Statement.require(cond: Boolean, message: () -> String) {
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if (!cond) raise(message())
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}
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fun statement(pos: Pos, isStaticConst: Boolean = false, isConst: Boolean = false, f: suspend (Scope) -> Obj): Statement =
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object : Statement(isStaticConst, isConst) {
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override val pos: Pos = pos
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override suspend fun execute(scope: Scope): Obj = f(scope)
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}
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fun statement(isStaticConst: Boolean = false, isConst: Boolean = false, f: suspend Scope.() -> Obj): Statement =
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object : Statement(isStaticConst, isConst) {
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override val pos: Pos = Pos.builtIn
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override suspend fun execute(scope: Scope): Obj = f(scope)
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}
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object NopStatement: Statement(true, true, ObjType.Void) {
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override val pos: Pos = Pos.builtIn
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override suspend fun execute(scope: Scope): Obj = ObjVoid
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}
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