Fixed name expression evaluation

src/main/java/fr/insarennes/nperier/minichamo/language/expressions/NameExpression.java

@@ -30,7 +30,11 @@ public class NameExpression extends Expression {
 
     @Override
     public Expression evaluate(Context ctx) {
-        throw new UnsupportedOperationException("A name expression is not associated with a value and should never be evaluated (programmer messed up, please report)");
+        if(ctx.hasVariable(name)) {
+            VariableDef vd = ctx.getVariable(name);
+            return vd.getExpression().evaluate(ctx);
+        }
+        throw new RuntimeException("Name expression " + name + " was not associated with a value (programmer messed up, please report)");
     }
 
     @Override

src/test/java/fr/insarennes/nperier/minichamo/parsing/ExpressionParserTest.java

@@ -90,6 +90,10 @@ public class ExpressionParserTest {
         Expression e = ExpressionParser.parse(it, ctx);
         Expression exp = new NameExpression("var", new GenericType("a"));
         Assertions.assertEquals(exp, e);
+        ValueDef vd = new ValueDef("var", SymbolPosition.begin(), new GenericType("int"));
+        vd.setExpression(new IntExpression(2));
+        ctx.addVariable(vd);
+        Assertions.assertEquals(vd.getExpression(), e.evaluate(ctx));
         Assertions.assertTrue(it.junkIf(TokenType.TERMINATION));
         Assertions.assertFalse(it.hasNext());
     }
@@ -122,5 +126,4 @@ public class ExpressionParserTest {
         Assertions.assertThrows(ParsingException.class, () -> ExpressionParser.parse(it, ctx));
     }
 
-
 }