Fix #1423 Transpose - use unicode \uF3C7 instead of symbol ᵀ

Characters.isSymjaIdentifierStart(fCurrentChar) runs before any operator
check. Since U+1D40 is a Unicode modifier letter, it is classified as an
identifier start. The unicode character U+F3C7 is used for `Transpose`

Author: axkr

symja_android_library/matheclipse-core/src/main/java/org/matheclipse/core/parser/ExprParserFactory.java

@@ -363,7 +363,7 @@ public IASTMutable createFunction(final IParserFactory factory, ExprParser parse
       "∍", // "SuchThat", 180, InfixExprOperator.RIGHT_ASSOCIATIVE),
       "∑", // "Sum", 325), //
       "∴", // "Therefore", 50, InfixExprOperator.RIGHT_ASSOCIATIVE),
-      "ᵀ", // "Transpose", 670),
+      "\uF3C7", // "Transpose", 670),
       "⊥", // UpTee
 
       "~"};
@@ -604,7 +604,7 @@ private static void init() {
           new InfixExprOperator("∍", "SuchThat", 180, InfixExprOperator.RIGHT_ASSOCIATIVE),
           new PrefixExprOperator("∑", "Sum", 325), //
           new InfixExprOperator("∴", "Therefore", 50, InfixExprOperator.RIGHT_ASSOCIATIVE),
-          new PostfixExprOperator("ᵀ", "Transpose", 670),
+          new PostfixExprOperator("\uF3C7", "Transpose", 670),
           new InfixExprOperator("⊥", "UpTee", 197, InfixExprOperator.LEFT_ASSOCIATIVE),
 
 

symja_android_library/matheclipse-core/src/test/java/org/matheclipse/core/system/ExprParserTestCase.java

@@ -3,6 +3,8 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import org.junit.jupiter.api.Test;
 import org.matheclipse.core.eval.EvalEngine;
+import org.matheclipse.core.eval.ExprEvaluator;
+import org.matheclipse.core.form.output.OutputFormFactory;
 import org.matheclipse.core.interfaces.IExpr;
 import org.matheclipse.core.parser.ExprParser;
 
@@ -91,4 +93,19 @@ public void testParserForAll() {
     assertEquals("∀a", //
         result.toString());
   }
+
+  @Test
+  public void testTransposeToString() {
+    // Transpose(List(List(1, 2), List(3, 4), List(5, 6)))
+    IExpr parse = new ExprEvaluator().parse("Transpose(List(List(1, 2), List(3, 4), List(5, 6)))");
+    String s = parse.toString();
+
+    OutputFormFactory outputFormFactory = OutputFormFactory.get(true, false, 5, 5);
+    String text = outputFormFactory.toString(parse);
+    assertEquals(text, "{{1,2},{3,4},{5,6}}\uF3C7");
+
+    // now parse back
+    IExpr parseBack = new ExprEvaluator().parse(text);
+    assertEquals(parseBack.fullFormString(), "Transpose(List(List(1, 2), List(3, 4), List(5, 6)))");
+  }
 }

symja_android_library/matheclipse-parser/src/main/java/org/matheclipse/parser/client/operator/ASTNodeFactory.java

@@ -324,7 +324,7 @@ public ASTNode createFunction(final INodeParserFactory factory, final ASTNode lh
           "∍", // "SuchThat", 180, InfixExprOperator.RIGHT_ASSOCIATIVE),
           "∑", // "Sum", 325), //
           "∴", // "Therefore", 50, InfixExprOperator.RIGHT_ASSOCIATIVE),
-          "ᵀ", // "Transpose", 670),
+          "\uF3C7", // "Transpose", 670),
           "⊥", // UpTee
 
           "~" // Tilde
@@ -478,7 +478,7 @@ private static void init() {
           new InfixOperator("∍", "SuchThat", 180, InfixOperator.RIGHT_ASSOCIATIVE), //
           new PrefixOperator("∑", "Sum", 325), //
           new InfixOperator("∴", "Therefore", 50, InfixOperator.RIGHT_ASSOCIATIVE), //
-          new PostfixOperator("ᵀ", "Transpose", 670), //
+          new PostfixOperator("\uF3C7", "Transpose", 670), //
           new InfixOperator("⊥", "UpTee", 197, InfixOperator.LEFT_ASSOCIATIVE),
 
           new TildeOperator("~", "§TILDE§", Precedence.TILDE_OPERATOR, InfixOperator.NONE),