Normalize "[,]" (GAP 4.11) to "MatElm" (GAP 4.12)

Author: zickgraf

CompilerForCAP/examples/MatElm.g

@@ -0,0 +1,17 @@
+#! @Chapter Examples and tests
+
+#! @Section Tests
+
+LoadPackage( "CompilerForCAP", false );
+
+#! @Example
+
+func := x -> x[1,1];;
+tree := ENHANCED_SYNTAX_TREE( func );;
+tree := CapJitResolvedGlobalVariables( tree );;
+Display( ENHANCED_SYNTAX_TREE_CODE( tree ) );
+#! function ( x_1 )
+#!     return MatElm( x_1, 1, 1 );
+#! end
+
+#! @EndExample

CompilerForCAP/gap/EnhancedSyntaxTree.gi

@@ -1193,6 +1193,19 @@ InstallGlobalFunction( ENHANCED_SYNTAX_TREE_CODE, function ( tree )
 
             fi;
 
+            # normalize "[,]" (GAP 4.11) to "MatElm" (GAP 4.12)
+            if tree.type = "EXPR_REF_GVAR" and tree.gvar = "[,]" then
+                
+                # this code is only executed with GAP 4.11, but coverage information is only uploaded for GAP master
+                Assert( 0, IsIdenticalObj( \[\,\], MatElm ) );
+                
+                tree := rec(
+                    type := "EXPR_REF_GVAR",
+                    gvar := "MatElm",
+                );
+                
+            fi;
+            
         fi;
 
         return tree;