X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;ds=sidebyside;f=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2FVariable.java;fp=bundles%2Forg.simantics.scl.compiler%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fcompiler%2Felaboration%2Fexpressions%2FVariable.java;h=c48232c405fce43c92f4cb3afb43e0b90b99ca01;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/Variable.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/Variable.java
new file mode 100755
index 000000000..c48232c40
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/elaboration/expressions/Variable.java
@@ -0,0 +1,79 @@
+package org.simantics.scl.compiler.elaboration.expressions;
+
+import org.simantics.scl.compiler.common.exceptions.InternalCompilerError;
+import org.simantics.scl.compiler.internal.codegen.references.IVal;
+import org.simantics.scl.compiler.types.Type;
+import org.simantics.scl.compiler.types.Types;
+import org.simantics.scl.compiler.types.exceptions.UnificationException;
+import org.simantics.scl.compiler.types.util.Typed;
+
+public class Variable implements Typed {
+    public static final Variable[] EMPTY_ARRAY = new Variable[0];
+    
+    String name;
+    Type type;
+    transient private IVal val;
+
+    public Variable(String name) {
+        this.name = name;
+    }
+
+    public Variable(String name, Type type) {
+        this.name = name;
+        this.type = type;
+    }
+
+    @Override
+    public Type getType() {
+        return type;
+    }
+
+    public String getName() {
+        return name;
+    }
+    
+    public void setType(Type type) {
+        if(type == null)
+            throw new NullPointerException();
+        if(this.type != null)
+            try {
+                Types.unify(type, this.type);
+            } catch(UnificationException e) {
+                throw new InternalCompilerError(e.getMessage());
+            }
+        else
+            this.type = type;
+    }
+
+    @Override
+    public String toString() {
+        return name; // + "$" + hashCode();
+    }
+    
+    public void setVal(IVal val) {
+        this.val = val;
+        val.setLabel(name);
+    }
+    
+    public IVal getVal() {
+        if(val == null)
+            throw new InternalCompilerError("Variable " + name + " (with type " + type + ") is not given value anywhere.");
+        return val;
+    }
+
+    public Variable copy() {
+        return new Variable(name, type);
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public static Variable[] concat(Variable[] a,
+            Variable[] b) {
+        Variable[] result = new Variable[a.length + b.length];
+        System.arraycopy(a, 0, result, 0, a.length);
+        System.arraycopy(b, 0, result, a.length, b.length);
+        return result;
+    }
+}