Bugfixes

src/nimkalc/objects/ast.nim

@@ -169,6 +169,7 @@ proc visit_call(self: NodeVisitor, node: AstNode): AstNode =
     of "tan":
       callFunction(tan, self.eval(node.arguments[0]).value)
     of "sqrt":
+      let arg = self.eval(node.arguments[0])
       ensurePositive(arg)
       callFunction(sqrt, self.eval(node.arguments[0]).value)
     of "log":
@@ -257,6 +258,12 @@ proc visit_unary(self: NodeVisitor, node: AstNode): AstNode =
         else:
           discard  # Unreachable
     of TokenType.Plus:
-        result = node  # Unary + does nothing
+      case expr.kind:
+        of NodeKind.Float:
+          result = AstNode(kind: NodeKind.Float, value: expr.value)
+        of NodeKind.Integer:
+          result = AstNode(kind: NodeKind.Integer, value: expr.value)
+        else:
+          discard  # Unreachable
     else:
       discard  # Unreachable

src/nimkalc/parsing/parser.nim

@@ -174,7 +174,7 @@ proc call(self: Parser): AstNode =
 proc unary(self: Parser): AstNode = 
   ## Parses unary expressions such as -1
   case self.step().kind:
-    of TokenType.Minus:
+    of TokenType.Minus, TokenType.Plus:
       result = AstNode(kind: NodeKind.Unary, unOp: self.previous(), operand: self.unary())
     else:
       result = self.call()