Fix implicit extension calls and apply scope captures

lynglib/src/commonTest/kotlin/CompileTimeResolutionSpecTest.kt

@@ -0,0 +1,192 @@
+/*
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * 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.
+ *
+ */
+
+import kotlinx.coroutines.test.runTest
+import net.sergeych.lyng.Compiler
+import net.sergeych.lyng.Script
+import net.sergeych.lyng.Source
+import net.sergeych.lyng.resolution.SymbolOrigin
+import kotlin.test.Ignore
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class CompileTimeResolutionSpecTest {
+
+    private suspend fun dryRun(code: String) =
+        Compiler.dryRun(Source("<dry-run>", code.trimIndent()), Script.defaultImportManager)
+
+    @Test
+    fun resolvesLocalsBeforeMembers() = runTest {
+        val report = dryRun(
+            """
+            class C {
+                val x = 1
+                fun f() { val x = 2; x }
+            }
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+        assertTrue(report.warnings.any { it.message.contains("shadowing member: x") })
+    }
+
+    @Test
+    fun capturesOuterLocalsDeterministically() = runTest {
+        val report = dryRun(
+            """
+            var g = 1
+            fun f() {
+                var g = 2
+                val h = { g }
+                h()
+            }
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+        assertTrue(report.captures.any { it.name == "g" && it.origin == SymbolOrigin.OUTER })
+    }
+
+    @Test
+    fun capturesModuleGlobalsAsOuterScope() = runTest {
+        val report = dryRun(
+            """
+            val G = 10
+            fun f(x) = x + G
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+        assertTrue(report.captures.any { it.name == "G" && it.origin == SymbolOrigin.MODULE })
+    }
+
+    @Test
+    fun unresolvedNameIsCompileError() = runTest {
+        val report = dryRun(
+            """
+            fun f() { missingName }
+            f()
+            """
+        )
+        assertTrue(report.errors.any { it.message.contains("missingName") })
+    }
+
+    @Test
+    fun miAmbiguityIsCompileError() = runTest {
+        val report = dryRun(
+            """
+            class A { fun foo() = 1 }
+            class B { fun foo() = 2 }
+            class C : A, B { }
+            C().foo()
+            """
+        )
+        assertTrue(report.errors.isNotEmpty())
+    }
+
+    @Test
+    fun miOverrideResolvesConflict() = runTest {
+        val report = dryRun(
+            """
+            class A { fun foo() = 1 }
+            class B { fun foo() = 2 }
+            class C : A, B {
+                override fun foo() = 3
+            }
+            C().foo()
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+    }
+
+    @Test
+    fun qualifiedThisMemberAccess() = runTest {
+        val report = dryRun(
+            """
+            class A { fun foo() = 1 }
+            class B { fun foo() = 2 }
+            class C : A, B {
+                override fun foo() = 3
+                fun aFoo() = this@A.foo()
+                fun bFoo() = this@B.foo()
+            }
+            val c = C()
+            c.aFoo()
+            c.bFoo()
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+    }
+
+    @Test
+    fun reflectionIsExplicitOnly() = runTest {
+        val report = dryRun(
+            """
+            fun f() {
+                val x = 1
+                scope.get("x")
+            }
+            f()
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+    }
+
+    @Test
+    fun memberShadowingAllowedWithWarning() = runTest {
+        val report = dryRun(
+            """
+            class C {
+                val x = 1
+                fun f() { val x = 2; x }
+            }
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+        assertTrue(report.warnings.any { it.message.contains("shadowing member: x") })
+    }
+
+    @Test
+    fun parameterShadowingAllowed() = runTest {
+        val report = dryRun(
+            """
+            fun f(a) {
+                var a = a * 10
+                a
+            }
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+    }
+
+    @Test
+    fun shadowingCaptureIsAllowed() = runTest {
+        val report = dryRun(
+            """
+            fun outer() {
+                var x = 1
+                fun inner() {
+                    val x = 2
+                    val c = { x }
+                    c()
+                }
+                inner()
+            }
+            """
+        )
+        assertTrue(report.errors.isEmpty())
+        assertTrue(report.captures.any { it.name == "x" && it.origin == SymbolOrigin.OUTER })
+    }
+}