Fix division remainder operator (%) (#272)

* Fix compatibility with Jinja for the % operator.

* Rename enum value DivReminder -> DivRemainder

* Add test for the remainder operator %

---------

Co-authored-by: Vesselin Atanasov <vesselin@awcreator.com>

Author: MeanSquaredError

src/expression_evaluator.cpp

@@ -127,7 +127,7 @@ InternalValue BinaryExpression::Evaluate(RenderContext& context)
     case jinja2::BinaryExpression::Minus:
     case jinja2::BinaryExpression::Mul:
     case jinja2::BinaryExpression::Div:
-    case jinja2::BinaryExpression::DivReminder:
+    case jinja2::BinaryExpression::DivRemainder:
     case jinja2::BinaryExpression::DivInteger:
     case jinja2::BinaryExpression::Pow:
         result = Apply2<visitors::BinaryMathOperation>(leftVal, rightVal, m_oper);

src/expression_evaluator.h

@@ -452,7 +452,7 @@ class BinaryExpression : public Expression
         Minus,
         Mul,
         Div,
-        DivReminder,
+        DivRemainder,
         DivInteger,
         Pow,
         StringConcat

src/expression_parser.cpp

@@ -242,7 +242,7 @@ ExpressionParser::ParseResult<ExpressionEvaluatorPtr<Expression>> ExpressionPars
         operation = BinaryExpression::DivInteger;
         break;
     case '%':
-        operation = BinaryExpression::DivReminder;
+        operation = BinaryExpression::DivRemainder;
         break;
     default:
         lexer.ReturnToken();

src/value_visitors.h

@@ -552,8 +552,8 @@ struct BinaryMathOperation : BaseVisitor<>
         case jinja2::BinaryExpression::Div:
             result = left / right;
             break;
-        case jinja2::BinaryExpression::DivReminder:
-            result = std::remainder(left, right);
+        case jinja2::BinaryExpression::DivRemainder:
+            result = std::fmod(left, right);
             break;
         case jinja2::BinaryExpression::DivInteger:
         {
@@ -607,7 +607,7 @@ struct BinaryMathOperation : BaseVisitor<>
             result = left / right;
             break;
         case jinja2::BinaryExpression::Div:
-        case jinja2::BinaryExpression::DivReminder:
+        case jinja2::BinaryExpression::DivRemainder:
         case jinja2::BinaryExpression::Pow:
             result = this->operator ()(static_cast<double>(left), static_cast<double>(right));
             break;

test/expressions_test.cpp

@@ -20,6 +20,7 @@ R"(
 {{ 7 / 3}}
 {{ 7 // 3 }}
 {{ 7 % intValue }}
+{{ 11 % 7 }}
 {{ 3 ** 4 }}
 {{ 10 ** -2 }}
 {{ 10/10 + 2*5 }}
@@ -48,6 +49,7 @@ R"(
 2.3333333
 2
 1
+4
 81
 0.01
 11