Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.compiler / src / org / simantics / scl / compiler / internal / types / TypeElaborationContext.java

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/types/TypeElaborationContext.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/types/TypeElaborationContext.java
new file mode 100644 (file)
index 0000000..bd56312
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/internal/types/TypeElaborationContext.java
@@ -0,0 +1,55 @@
+package org.simantics.scl.compiler.internal.types;
+
+import gnu.trove.map.hash.THashMap;
+
+import org.simantics.scl.compiler.types.TVar;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+import org.simantics.scl.compiler.types.kinds.Kinds;
+import org.simantics.scl.compiler.types.util.ITypeEnvironment;
+
+public class TypeElaborationContext {
+
+    THashMap<String, TVar> vars; 
+    ITypeEnvironment environment;
+        
+    public TypeElaborationContext(
+            THashMap<String, TVar> vars,
+            ITypeEnvironment environment) {
+        this.vars = vars;
+        this.environment = environment;
+    }
+    
+    public TypeElaborationContext(ITypeEnvironment environment) {
+        this(new THashMap<String, TVar>(), environment);
+    }
+
+    public TVar resolveTypeVariable(String varName) {
+        TVar var = vars.get(varName);
+        if(var == null) {
+            var = Types.var(Kinds.STAR /* FIXME */);
+            vars.put(varName, var);
+        }
+        return var;
+    }
+
+    public TVar push(String varName) {
+        return vars.put(varName, Types.var(Kinds.STAR /* FIXME */)); 
+    }
+
+    public TVar pop(String varName, TVar oldVar) {
+        if(oldVar == null)
+            return vars.remove(varName);
+        else
+            return vars.put(varName, oldVar);
+    }
+    
+    public Type resolveTypeConstructor(String name) {
+        return environment.resolve(null, name);
+    }
+
+    public Type resolveTypeConstructor(String namespace, String name) {
+        return environment.resolve(namespace, name);
+    }
+
+}