Merge branch '__rultor'

eo-maven-plugin/src/main/resources/org/eolang/maven/pre/to-java.xsl

@@ -485,9 +485,16 @@ SOFTWARE.
       <xsl:text>, </xsl:text>
       <xsl:choose>
         <xsl:when test="@as">
-          <xsl:text>"</xsl:text>
-          <xsl:value-of select="eo:attr-name(@as)"/>
-          <xsl:text>"</xsl:text>
+          <xsl:choose>
+            <xsl:when test="matches(@as,'^[0-9]+$')">
+              <xsl:value-of select="eo:attr-name(@as)"/>
+            </xsl:when>
+            <xsl:otherwise>
+              <xsl:text>"</xsl:text>
+              <xsl:value-of select="eo:attr-name(@as)"/>
+              <xsl:text>"</xsl:text>
+            </xsl:otherwise>
+          </xsl:choose>
         </xsl:when>
         <xsl:when test="../@base = 'org.eolang.error'">
           <xsl:text>"α"</xsl:text>

eo-maven-plugin/src/test/resources/org/eolang/maven/packs/pre/bindings-to-java.yaml

@@ -0,0 +1,16 @@
+xsls:
+  - /org/eolang/parser/add-default-package.xsl
+  - /org/eolang/maven/pre/classes.xsl
+  - /org/eolang/maven/pre/attrs.xsl
+  - /org/eolang/maven/pre/data.xsl
+  - /org/eolang/maven/pre/to-java.xsl
+tests:
+  - /program/errors[count(*)=0]
+  - //java/text()[contains(., 'new PhWith(ret, 0')]
+  - //java/text()[contains(., 'new PhWith(ret, "ρ"')]
+  - //java/text()[contains(., 'new PhWith(ret, "text"')]
+eo: |
+  [] > main
+    stdout x:0 > print1
+    stdout x:^ > print2
+    stdout x:text > print3

eo-parser/src/main/antlr4/org/eolang/parser/Program.g4

@@ -442,7 +442,7 @@ version
     ;
 
 // Binding
-as  : COLON (NAME | RHO)
+as  : COLON (NAME | RHO | INT)
     ;
 
 // Data

eo-parser/src/main/java/org/eolang/parser/ParsingTrain.java

@@ -43,6 +43,9 @@
  * Train of XSL shifts.
  *
  * @since 0.1
+ * @todo #2665:30min Check negative int bindings via xsl. It's possible now to make application
+ *  with integer bindings like {@code x a:0 b:1}. Need to add xsl transformation that would check
+ *  if such binding is negative and would add an error to "errors" section.
  */
 public final class ParsingTrain extends TrEnvelope {
 

eo-parser/src/main/java/org/eolang/parser/XeListener.java

@@ -948,11 +948,14 @@ public void exitVersion(final ProgramParser.VersionContext ctx) {
     }
 
     @Override
+    @SuppressWarnings("PMD.ConfusingTernary")
     public void enterAs(final ProgramParser.AsContext ctx) {
         this.objects.enter();
         final String has;
-        if (ctx.RHO() == null) {
+        if (ctx.NAME() != null) {
             has = ctx.NAME().getText();
+        } else if (ctx.INT() != null) {
+            has = ctx.INT().getText();
         } else {
             has = "^";
         }

eo-parser/src/test/resources/org/eolang/parser/packs/full-syntax.yaml

@@ -7,6 +7,8 @@ tests:
   - //o[@base='string']
   - //o[@name='hello' and @const]
   - //o[@as='i']
+  - //o[@as='1']
+  - //o[@as='0']
   - //o[@base='&']
   - //o[@base='.<']
   - //o[@base='.five']
@@ -55,8 +57,8 @@ eo: |
             "家"
       f'
         z'
-          (z 5):hey
-          z:hoi
+          (z 5):0
+          z:1
       a.
         b.
           c.