release-0.7

• Updated how comments are handled (beginning with "#" or "//").
  • Reported in #27, resolved in #28.
• Continue execution after encountering bare literals.
  • Reported in #30, resolved in #31.
  • NOTE: This is not what "real TCL" does, that would show an error.
• Quote the return value from repeat and for
  • This stops output from being executed, as reported in #29.
  • Fixed in #32.
• Test case coverage has been returned to 100%.

release-0.6

This release adds the power-operator (**), and updates the API of the interpreter to allow the execution of a script multiple times.

No real changes other than the return value(s) of the constructor changing.

release-0.5

This release updates the error-handling enough that all the sample code works, and we could reinstate the failure-case for invocations of unknown words.

The new env word was added, to retrieve the value of an environmental variable, and test-cases were added to our environment package - which were missing - now the coverage of the whole codebase is 100%.

release-0.4

• exit no longer calls os.Exit.
  • Instead it returns an error-code that can be caught by applications which embed this application.
• The addition of two new primitives to expr:
  • % for modulus.
  • != for numeric inequality-testing.
• 100% test coverage of the core packages.
  • As updated in #22.
• Added complete example of embedding the interpreter inside a host-application.
  • As implemented in #24.

release-0.3

This release updates the lexer a little, to revert a change which broke comments in some circumstances.

Beyond that I've added a bunch of examples beneath examples/, in addition to the two main samples which were already highlighted in the README file:

• input.tcl - An overview of how TCL can be used.
• picol.tcl - The sample code from the picol project, which works here too.

release-0.2

This release features a small number of fixes and improvements:

• Correctly handle the count of arguments in user-defined functions.
  • Reported in #15, and resolved in #17.
• Correctly handle return statements even within if
  • Reported in #16, and resolved in #18.
  • This required another minor tweak, but seems robust now and test-cases will ensure there are no further regressions.
• Updated the standard library to add some new procedures, available to all scripts by default:
  • min(a, b)
  • max(a, b)
  • loop(var, min, max, body)
• Allow escaping $ inside strings, via double-quoting:
  • puts "$$a is $a"

release-0.1

This is our initial release! As per the README.md file we've got a working set of core primitives:

• append, break, continue, decr, eval, exit, expr, for, if, incr, proc, puts, return, set, & while.

We also have 100% test-coverage of the core packages which are used to implement the interpreter, and a decent range of sample code both demonstrating and using the language.

Future releases might extend the primitives, add more facilities, or cleanup areas of the implementation but this is a good base upon which to build.