Update to v1.5.v1.5

  The update to version 1.5 is rather substantial, and introduces some minor
  backward-incompatibilities:
    * The header "#!symbols" has been replaced by "#!virtual_fields"
    * Multiplying polynomials using the '*' symbol is no longer supported (or,
      rather, the symbolic capabilities of meankondo were enhanced, and the
      syntax has been changed).
    * 'meantools exp' has been removed (its functionality is now handled by
      other means)
    * 'meantoolds derive' has been replaced by 'meantools differentiate'

  * The symbolic capabilities were enhanced: polynomials can now be
    multiplied, added, exponentiated, and their logarithms can be taken
    directly in the configuration file.

  * The flow equation can now be processed after being computed using the
    various "#!postprocess_*" entries.

  * Deprecated kondo_preprocess.

  * Compute the mean using an LU decomposition if possible.

  * More detailed checks for syntax errors in configuration file.

  * Check that different '#!group' entries are indeed uncorrelated.

  * New flags in meankondo: '-p' and '-A'.

  * New tool: meantools expand.

  * Improve conversion to LaTeX using meantools-convert

  * Assign terms randomly to different threads.

  * Multiple bug fixes

1 files changed, 48 insertions, 0 deletions

diff --git a/src/tree.h b/src/tree.h
new file mode 100644
index 0000000..60b222c
--- /dev/null
+++ b/src/tree.h
@@ -0,0 +1,48 @@
+/*
+Copyright 2015-2022 Ian Jauslin
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/* Trees */
+
+#ifndef TREE_H
+#define TREE_H
+
+#include "types.h"
+
+int init_Tree(Tree* tree, int memory_children, int memory_label);
+int free_Tree(Tree tree);
+
+// copy
+int tree_cpy(Tree input, Tree* output);
+int tree_cpy_noinit(Tree input, Tree* output);
+
+// resize memory
+int tree_resize(Tree* tree, int newsize);
+
+// set label
+int tree_set_label(Char_Array label, Tree* tree);
+
+// add a child to a tree
+int tree_append_child(Tree tree, Tree* output);
+// add a child to a tree without allocating memory for the new child
+int tree_append_child_noinit(Tree tree, Tree* output);
+
+// concatenate the children of two trees
+int tree_concat_children(Tree input, Tree* output);
+// noinit
+int tree_concat_children_noinit(Tree input, Tree* output);
+
+#endif
+