more tests

docs/samples/happy_numbers.lyng

@@ -16,9 +16,15 @@ fun naiveCountHappyNumbers() {
     count
 }
 
+import lyng.time
+
 //
 // After all optimizations it takes ~120ms.
 //
+//for( r in 1..100 ) {
+//    val start = Instant.now()
     val found = naiveCountHappyNumbers()
-println("Found happy numbers: "+found)
+//    println("Found happy numbers: %d time %s"(found, Instant.now() - start))
     assert( found == 55252 )
+//    delay(0.01)
+//}

lynglib/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt

@@ -492,7 +492,8 @@ class Compiler(
                     // if it is an open end range, then the end of line could be here that we do not want
                     // to skip in parseExpression:
                     val current = cc.current()
-                    val right = if( current.type == Token.Type.NEWLINE || current.type == Token.Type.SINLGE_LINE_COMMENT)
+                    val right =
+                        if (current.type == Token.Type.NEWLINE || current.type == Token.Type.SINLGE_LINE_COMMENT)
                             null
                         else
                             parseExpression()
@@ -1383,7 +1384,13 @@ class Compiler(
                     loopIterable(forContext, sourceObj, loopSO, body, elseStatement, label, canBreak)
                 } else {
                     val size = runCatching { sourceObj.invokeInstanceMethod(forContext, "size").toInt() }
-                        .getOrElse { throw ScriptError(tOp.pos, "object is not enumerable: no size", it) }
+                        .getOrElse {
+                            throw ScriptError(
+                                tOp.pos,
+                                "object is not enumerable: no size in $sourceObj",
+                                it
+                            )
+                        }
 
                     var result: Obj = ObjVoid
                     var breakCaught = false

lynglib/src/commonMain/kotlin/net/sergeych/lyng/stdlib_included/root_lyng.kt

@@ -77,9 +77,8 @@ fun Iterable.dropLast(n) {
 }
 
 fun Iterable.takeLast(n) {
-    val list = this
     val buffer = RingBuffer(n)
-    for( item in list ) buffer += item
+    for( item in this ) buffer += item
     buffer
 }
 

lynglib/src/commonTest/kotlin/ScriptTest.kt

@@ -3123,9 +3123,47 @@ class ScriptTest {
                     println(e.toString())
                     println("-------------------- dee")
                     println(decoded.toString())
-//                    assertEquals( e.toString(), decoded.toString() )
+                    assertEquals( e.toString(), decoded.toString() )
                 }
                 """.trimIndent()
         )
     }
+
+    @Test
+    fun testThisInClosure() = runTest {
+        eval("""
+            fun Iterable.sum2by(f) {
+                var acc = null
+                for( x in this ) {
+                    println(x)
+                    println(f(x))
+                    acc = acc?.let { acc + f(x) } ?: f(x)
+                }
+            }
+            class T(val coll, val factor) {
+                fun sum() {
+                    // here we use ths::T and it must be available:
+                    coll.sum2by { it * factor }
+                }
+            }
+            assertEquals(60, T([1,2,3], 10).sum())
+        """.trimIndent())
+    }
+
+    @Test
+    fun testThisInFlowClosure() = runTest {
+        eval("""
+            class T(val coll, val factor) {
+                fun seq() {
+                    flow {
+                        for( x in coll ) {
+                            emit(x*factor)
+                        }
+                    }
+                }
+            }
+            assertEquals([10,20,30], T([1,2,3], 10).seq().toList())
+        """.trimIndent())
+    }
+
 }