Make Slice Syntax Pythonic

[viega]

Also, for naming specific tests, respect C4M_TEST_DIR when there isn't an absolute path provided.
Removed the terminal width assert.

Fixes #79

[ee7]

LGTM. Though I suppose to claim full "pythonic slice syntax", we'd also have to support e.g. x[::-1] and x[1::2].

Non-blocking question: I guess it's intended that we can no longer pass a relative path to c4test? I know I can still write either:

• ./dev run foo.c4m
• cd debug && c4test foo.c4m

but I was previously writing e.g. debug/c4test tests/foo.c4m sometimes. I guess partly because that allows tab completion, and because ./dev run tests/foo.c4m doesn't work.

[viega]

LGTM. Though I suppose to claim full "pythonic slice syntax", we'd also have to support e.g. x[::-1] and x[1::2].

No, I have no interest in the second colon.

Non-blocking question: I guess it's intended that we can no longer pass a relative path to c4test? I know I can still write either:

• ./dev run foo.c4m
• cd debug && c4test foo.c4m

It's because the cwd when running the 'dev' script is where the binary is, to prevent any kind of confusion with testing. As such, the test runner assumes "../test/". You can set CON4M_TEST_DIR. Mine is just set to the test directory.

When I get to a real compiler command line, this will be moot, it's just for the test runner.

but I was previously writing e.g. debug/c4test tests/foo.c4m sometimes. I guess partly because that allows tab completion, and because ./dev run tests/foo.c4m doesn't work.

[ee7]

No, I have no interest in the second colon.

Sure, same. I meant "as long as we don't write just 'pythonic slicing syntax' in the docs without further elaboration, lest someone infers that e.g. x[::-1] is supported".

You can set CON4M_TEST_DIR.

Already done :)