X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2FEGetConstraint.java;fp=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2FEGetConstraint.java;h=ef5412c7bb093f8e275adb984f8ee8c7faba7e5f;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EGetConstraint.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EGetConstraint.java
new file mode 100755
index 000000000..ef5412c7b
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/EGetConstraint.java
@@ -0,0 +1,101 @@
+package org.simantics.scl.compiler.elaboration.expressions;
+
+import gnu.trove.map.hash.TObjectIntHashMap;
+import gnu.trove.set.hash.THashSet;
+import gnu.trove.set.hash.TIntHashSet;
+
+import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;
+import org.simantics.scl.compiler.elaboration.contexts.TypingContext;
+import org.simantics.scl.compiler.errors.Locations;
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;
+import org.simantics.scl.compiler.types.TPred;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.exceptions.MatchException;
+
+public class EGetConstraint extends SimplifiableExpression {
+    TPred constraint;
+    EVariable evidence;
+        
+    public EGetConstraint(long loc, TPred constraint) {
+        super(loc);
+        this.constraint = constraint;
+    }
+
+    @Override
+    public void collectRefs(TObjectIntHashMap<Object> allRefs,
+            TIntHashSet refs) {
+    }
+    
+    @Override
+    public void collectVars(TObjectIntHashMap<Variable> allVars,
+            TIntHashSet vars) {
+        if(evidence != null)
+            evidence.collectVars(allVars, vars);        
+    }
+    
+    @Override
+    public Expression inferType(TypingContext context) {
+        Variable variable = new Variable("evidence");
+        variable.setType(constraint);
+        evidence = new EVariable(getLocation(), variable);
+        evidence.setType(variable.getType());
+        context.addConstraintDemand(evidence);
+        return this;
+    }
+    
+    @Override
+    protected void updateType() throws MatchException {
+        setType(constraint);
+    }
+    
+    @Override
+    public void collectFreeVariables(THashSet<Variable> vars) {
+        if(evidence != null)
+            evidence.collectFreeVariables(vars);
+    }
+    
+    @Override
+    public Expression simplify(SimplificationContext context) {
+        return evidence.simplify(context);
+    }
+    
+    @Override
+    public Expression resolve(TranslationContext context) {
+        return this;
+    }
+    
+    @Override
+    public Expression decorate(ExpressionDecorator decorator) {     
+        return decorator.decorate(this);
+    }
+
+    @Override
+    public void collectEffects(THashSet<Type> effects) {
+    }
+    
+    @Override
+    public void setLocationDeep(long loc) {
+        if(location == Locations.NO_LOCATION) {
+            location = loc;
+            if(evidence != null)
+                evidence.setLocationDeep(loc);
+        }
+    }
+    
+    @Override
+    public void accept(ExpressionVisitor visitor) {
+        visitor.visit(this);
+    }
+
+    @Override
+    public void forVariables(VariableProcedure procedure) {
+        evidence.forVariables(procedure);
+    }
+    
+    @Override
+    public Expression accept(ExpressionTransformer transformer) {
+        return transformer.transform(this);
+    }
+
+}