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CHANGELOG.md

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  • 0.2 (22 January 2025)

    • Allow >< as syntax for product types
    • Use syntax T and F for booleans
    • New :table command
    • Suggest alternate variable names based on edit distance
    • Fix crash when computing 0^(-1)
    • min and max are now prefix instead of infix
    • Display multiple example types for things with nontrivial polymorphism (#388)
    • Randomness primitives (Justin Grubbs, #390)
    • Automatic memoization (Justin Grubbs, #394)
    • Remove decimal output
    • Function pattern coverage checking (Colin Phillips, #434)
    • A lot more documentation, including the start of a "gentle introduction"
    • Add support for GHC 9.10 and drop 9.4
    • Better parser for :load (#430)
    • Better test result reporting (#428)

  • 0.1.6 (16 December 2023)

    • A bunch more documentation
    • Allow != as a synonym for /=
    • Allow =< and => as aliases for <= and >=, respectively
    • Better reporting of test results
    • Load standard library modules immediately on startup
    • :doc now works for case expressions, wildcard patterns, unit and Unit
    • Allow optional commas on either side of an ellipsis (#361)
    • Propositions can be combined with binary operators (thanks to @cally-cmd)

  • 0.1.5 (12 March 2022)

    • Syntax errors in function definitions now result in much more helpful error messages. Before, it would just complain about something being wrong with the '=' sign. (#346)

  • 0.1.4 (10 March 2022)

    • New features or syntax

      • if and when are now synonyms

    • Bug fixes

      • Only allow constructing sets and bags with element types that can be compared (#306)

    • UI

      • Test results are now printed in the same order in which they were declared

  • 0.1.3.1 (5 March 2022)

    • Fix #340: disco no longer crashes when encountering an undefined name at runtime, but prints a nice error message instead.

  • 0.1.3.0 (3 March 2022)

    • New features or syntax

      • ∈ now works as a synonym for elem
      • add → and ↔ as synonyms for ->, <->

    • Additional documentation for |~|, power

    • UI

      • --help, --version, and the welcome message now all report the current version number
      • Typechecking errors now report the name of the thing being typechecked when the failure occurred
      • The values of top-level expressions are now printed when :loading

  • 0.1.2.0 (12 February 2022)

    • New features or syntax

      • Add String type synonym
      • New iff / <-> operator
      • New Cartesian product operator ><
      • |~| notation now denotes container size in addition to absolute value

    • Documentation

      • :doc command now works on many more things
      • A lot of additional documentation and some improved error messages

    • A few small bug fixes related to parsing

  • 0.1.1.0 (21 January 2022)

    • ->, /\, \/ syntax for implies, and, or
    • truthtable.disco example
    • Coinductively check user-defined types for qualifiers (#317)
    • Additional documentation

  • 0.1.0.0 (17 January 2022): initial release