From 0fef79ab46ef07e8f7af6ff211c2b884fc4b735d Mon Sep 17 00:00:00 2001
From: =?utf8?q?Hannu=20Niemist=C3=B6?= <hannu.niemisto@semantum.fi>
Date: Tue, 13 Sep 2016 16:49:01 +0300
Subject: [PATCH] Small SCL changes

Removed error message from subsumption constraints that
cannot be simplified away, because the simplification is not
working correctly in certain standard cases.

Removed Json2 from StandardLibrary

Small efficiency fix in Prelude

Check if the input block expression is empty in ExpressionEvalutor.

Change-Id: I1b1843cb7847886618aea5063aff53fef35814cb
---
 .../compiler/internal/elaboration/subsumption/SubSolver.java    | 2 +-
 .../src/org/simantics/scl/compiler/top/ExpressionEvaluator.java | 2 +-
 bundles/org.simantics.scl.runtime/scl/Prelude.scl               | 2 +-
 bundles/org.simantics.scl.runtime/scl/StandardLibrary.scl       | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/subsumption/SubSolver.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/subsumption/SubSolver.java
index 70adf524b..f9b5efc3b 100644
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/subsumption/SubSolver.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/elaboration/subsumption/SubSolver.java
@@ -49,7 +49,7 @@ public class SubSolver {
         reduceChains();
         propagateUpperBounds();
         checkLowerBounds();
-        errorFromUnsolvedEquations();
+        //errorFromUnsolvedEquations();
         //System.out.println("--");
         //print();
     }
diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/top/ExpressionEvaluator.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/top/ExpressionEvaluator.java
index 5c8f59bb2..39f0ac721 100644
--- a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/top/ExpressionEvaluator.java
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/top/ExpressionEvaluator.java
@@ -182,7 +182,7 @@ public class ExpressionEvaluator {
         final Environment environment = runtimeEnvironment.getEnvironment();
         
         // Parse expression
-        if(expressionText != null) {
+        if(expressionText != null && !expressionText.trim().isEmpty()) {
             try {
                 switch(parseMode) {
                 case BLOCK: {
diff --git a/bundles/org.simantics.scl.runtime/scl/Prelude.scl b/bundles/org.simantics.scl.runtime/scl/Prelude.scl
index b29b04a2f..84f8b91b6 100644
--- a/bundles/org.simantics.scl.runtime/scl/Prelude.scl
+++ b/bundles/org.simantics.scl.runtime/scl/Prelude.scl
@@ -1266,7 +1266,7 @@ instance MonadZero Maybe where
     mzero = Nothing
 
 instance MonadOr Maybe where
-    morelse (Just a) _ = Just a
+    morelse a@(Just _) _ = a
     morelse _ b = b
 
 "`execJust v f` executes the function `f` with parameter value `x`, if `v=Just x`. If `v=Nothing`, the function does nothing."
diff --git a/bundles/org.simantics.scl.runtime/scl/StandardLibrary.scl b/bundles/org.simantics.scl.runtime/scl/StandardLibrary.scl
index 6b43166e3..76ecece9c 100644
--- a/bundles/org.simantics.scl.runtime/scl/StandardLibrary.scl
+++ b/bundles/org.simantics.scl.runtime/scl/StandardLibrary.scl
@@ -15,7 +15,7 @@ include "MSet" as MSet
 include "MList" as MList
 include "MMultiMap" as MMultiMap
 include "Coercion"
-include "Json2"
+//include "Json2"
 
 include "IterN" as Extra
 
-- 
2.47.1