<commit_before># Changes

## clingo 5.6.0

  * add theory related functions to backend (#381)
  * add support for comparisons with more than one relation (#368)
  * extend safety by computing intervals from comparisons (#375)
  * add and ground base part by default in Python API (#378)
  * remove experimental CSP extensions (#367)
  * require at least MSVC 15.0 to build on Windows

## clingo 5.5.2
  * fix `parse_files` in C++ API
  * fix adding clauses during enumeration (#359)
  * fix incremental projection with backend (#362)
  * update clasp

## clingo 5.5.1
  * extend theory class to get version information
  * improve performance of `Model.symbol` (#296)
  * tidy up `clingo.hh` header regarding C++17 deprecations (#344)
  * fix error handling while solving in Python API (#334)
  * fix various outher bugs

## clingo 5.5.0

  * allow for using `not` as a theory operator (#193)
  * improve parsing of disjunctions (#171)
  * rename `max_size` to `size` in APIs and remove previous `size` method<commit_msg>update changes<commit_after># Changes

## clingo 5.6.0

  * add support for parsing files in ASPIF format (#387)
  * add theory related functions to backend (#381)
  * add support for comparisons with more than one relation (#368)
  * extend safety by computing intervals from comparisons (#375)
  * add and ground base part by default in Python API (#378)
  * remove experimental CSP extensions (#367)
  * require at least MSVC 15.0 to build on Windows
  * large code refactoring (#376)
  * replace internal hash set implementation by external one (#386)
  * update clasp

## clingo 5.5.2
  * fix `parse_files` in C++ API
  * fix adding clauses during enumeration (#359)
  * fix incremental projection with backend (#362)
  * update clasp

## clingo 5.5.1
  * extend theory class to get version information
  * improve performance of `Model.symbol` (#296)
  * tidy up `clingo.hh` header regarding C++17 deprecations (#344)
  * fix error handling while solving in Python API (#334)
  * fix various outher bugs

## clingo 5.5.0

  * allow for using `not` as a theory operator (#193)
  * improve parsing of disjunctions (#171)
  * rename `max_size` to `size` in APIs and remove previous `size` method
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