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    * The header "#!symbols" has been replaced by "#!virtual_fields"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    * 'meantoolds derive' has been replaced by 'meantools differentiate'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, 42 insertions, 0 deletions

diff --git a/src/symbolic_parser.h b/src/symbolic_parser.h
new file mode 100644
index 0000000..e91c902
--- /dev/null
+++ b/src/symbolic_parser.h
@@ -0,0 +1,42 @@
+/*
+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.
+*/
+
+/*
+  parse symbolic expressions
+*/
+
+#ifndef SYMBOLIC_PARSER_H
+#define SYMBOLIC_PARSER_H
+
+#include "types.h"
+
+// parse a symbolic expression from a char_array
+int parse_symbolic_expression(Char_Array str, Fields_Table fields, Variables variables, Polynomial* polynomial);
+// from char*
+int parse_symbolic_expression_str(char* str, Fields_Table fields, Variables variables, Polynomial* polynomial);
+
+// compute the symbol tree from a string
+int char_array_to_symbol_tree(Char_Array str, Tree* symbol_tree);
+// from char*
+int str_to_symbol_tree(char* str, Tree* symbol_tree);
+
+// find matching '<' and '>'
+int matching_bracket(Char_Array str, int start);
+
+// resolve a symbol tree to its corresponding polynomial
+int resolve_symbol_tree(Tree symbol_tree, Fields_Table fields, Variables variables, Polynomial* output);
+
+#endif