Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / elaboration / expressions / EGetConstraint.java

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 (executable)
index 0000000..ef5412c
--- /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;\r
+\r
+import gnu.trove.map.hash.TObjectIntHashMap;\r
+import gnu.trove.set.hash.THashSet;\r
+import gnu.trove.set.hash.TIntHashSet;\r
+\r
+import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TranslationContext;\r
+import org.simantics.scl.compiler.elaboration.contexts.TypingContext;\r
+import org.simantics.scl.compiler.errors.Locations;\r
+import org.simantics.scl.compiler.internal.elaboration.utils.ExpressionDecorator;\r
+import org.simantics.scl.compiler.types.TPred;\r
+import org.simantics.scl.compiler.types.Type;\r
+import org.simantics.scl.compiler.types.exceptions.MatchException;\r
+\r
+public class EGetConstraint extends SimplifiableExpression {\r
+    TPred constraint;\r
+    EVariable evidence;\r
+        \r
+    public EGetConstraint(long loc, TPred constraint) {\r
+        super(loc);\r
+        this.constraint = constraint;\r
+    }\r
+\r
+    @Override\r
+    public void collectRefs(TObjectIntHashMap<Object> allRefs,\r
+            TIntHashSet refs) {\r
+    }\r
+    \r
+    @Override\r
+    public void collectVars(TObjectIntHashMap<Variable> allVars,\r
+            TIntHashSet vars) {\r
+        if(evidence != null)\r
+            evidence.collectVars(allVars, vars);        \r
+    }\r
+    \r
+    @Override\r
+    public Expression inferType(TypingContext context) {\r
+        Variable variable = new Variable("evidence");\r
+        variable.setType(constraint);\r
+        evidence = new EVariable(getLocation(), variable);\r
+        evidence.setType(variable.getType());\r
+        context.addConstraintDemand(evidence);\r
+        return this;\r
+    }\r
+    \r
+    @Override\r
+    protected void updateType() throws MatchException {\r
+        setType(constraint);\r
+    }\r
+    \r
+    @Override\r
+    public void collectFreeVariables(THashSet<Variable> vars) {\r
+        if(evidence != null)\r
+            evidence.collectFreeVariables(vars);\r
+    }\r
+    \r
+    @Override\r
+    public Expression simplify(SimplificationContext context) {\r
+        return evidence.simplify(context);\r
+    }\r
+    \r
+    @Override\r
+    public Expression resolve(TranslationContext context) {\r
+        return this;\r
+    }\r
+    \r
+    @Override\r
+    public Expression decorate(ExpressionDecorator decorator) {     \r
+        return decorator.decorate(this);\r
+    }\r
+\r
+    @Override\r
+    public void collectEffects(THashSet<Type> effects) {\r
+    }\r
+    \r
+    @Override\r
+    public void setLocationDeep(long loc) {\r
+        if(location == Locations.NO_LOCATION) {\r
+            location = loc;\r
+            if(evidence != null)\r
+                evidence.setLocationDeep(loc);\r
+        }\r
+    }\r
+    \r
+    @Override\r
+    public void accept(ExpressionVisitor visitor) {\r
+        visitor.visit(this);\r
+    }\r
+\r
+    @Override\r
+    public void forVariables(VariableProcedure procedure) {\r
+        evidence.forVariables(procedure);\r
+    }\r
+    \r
+    @Override\r
+    public Expression accept(ExpressionTransformer transformer) {\r
+        return transformer.transform(this);\r
+    }\r
+\r
+}\r