rt-without-atom.xsl

<?xml version="1.0" encoding="UTF-8"?>
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<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" id="rt-without-atom" 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:element name="error">
            <xsl:attribute name="check">
              <xsl:text>rt-without-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:element>
        </xsl:if>
      </xsl:if>
    </xsl:copy>
  </xsl:template>
  <xsl:template match="node()|@*">
    <xsl:copy>
      <xsl:apply-templates select="node()|@*"/>
    </xsl:copy>
  </xsl:template>
</xsl:stylesheet>