Added check if there are atoms, but no +rt meta.

eo-parser/src/main/resources/org/eolang/parser/errors/rt-without-atom.xsl → eo-parser/src/main/resources/org/eolang/parser/errors/rt-and-atoms.xsl

@@ -22,28 +22,40 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 -->
-<!--
-  @todo #2921:30m Add check if there are atoms, but no +rt meta. It should be illegal.
-    Don't forget to remove the puzzle.
--->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="rt-without-atom" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="rt-and-atoms" version="2.0">
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/program/errors">
     <xsl:copy>
       <xsl:apply-templates select="node()|@*"/>
-      <xsl:if test="/program/metas/meta[head='rt']">
-        <xsl:if test="not(//o[@atom])">
+      <xsl:if test="//o[@atom]">
+        <xsl:if test="not(/program/metas/meta[head='rt'])">
+          <xsl:element name="error">
+            <xsl:attribute name="check">
+              <xsl:text>rt-and-atoms</xsl:text>
+            </xsl:attribute>
+            <xsl:attribute name="line">
+              <xsl:value-of select="@line"/>
+            </xsl:attribute>
+            <xsl:attribute name="severity">
+              <xsl:text>error</xsl:text>
+            </xsl:attribute>
+            <xsl:text>Using atoms without +rt meta is prohibited</xsl:text>
+          </xsl:element>
+        </xsl:if>
+      </xsl:if>
+      <xsl:if test="not(//o[@atom])">
+        <xsl:if test="/program/metas/meta[head='rt']">
           <xsl:element name="error">
             <xsl:attribute name="check">
-              <xsl:text>rt-without-atoms</xsl:text>
+              <xsl:text>rt-and-atoms</xsl:text>
             </xsl:attribute>
             <xsl:attribute name="line">
               <xsl:value-of select="@line"/>
             </xsl:attribute>
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>Using +rt meta without atoms</xsl:text>
+            <xsl:text>Using +rt meta without atoms is prohibited</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:if>

eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-atoms-without-rt.yaml

@@ -0,0 +1,14 @@
+xsls:
+  - /org/eolang/parser/errors/rt-and-atoms.xsl
+tests:
+  - /program/errors[count(error[@severity='error'])=1]
+eo: |
+  +architect [email protected]
+  +home https://github.com/objectionary/eo
+  +package org.eolang
+  +version 0.0.0
+
+  # Bytes.
+  [] > bytes
+    # Equals to another object.
+    [x] > eq /bool

eo-parser/src/test/resources/org/eolang/parser/packs/catches/catches-rt-without-atoms.yaml

@@ -1,5 +1,5 @@
 xsls:
-  - /org/eolang/parser/errors/rt-without-atom.xsl
+  - /org/eolang/parser/errors/rt-and-atoms.xsl
 tests:
   - /program/errors[count(error[@severity='error'])=1]
 eo: |