| Commit message (Collapse) | Author | Age | Files | Lines |
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Fixed a regression that was introduced in:
1415c8f9b89699000ef8d864ff8f0e1bebca4a5f.
Moving aliases to read() broke how pipes worked. This commit removes the
troublesome append!() macro, and replaces it with some logic in the
add() function (impl Appendable for Poem).
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This patches fixes a bug, where sometimes, when a Rune::String was
detected, the resulting string from the string!() macro wasn't getting
pushed to the current verse.
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Instead of handling aliases in the recite() function, which requires two
loops to handle properly with the current implementation, offload
checking for aliases to the read() function.
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Previously, if an environment variable was given in a string, such as:
'$PATH' or "$PATH", both would be replaced with the value of $PATH from
the environment. However, for single quotes strings, any values inside
should be taken at face value. In other words, echo '$PATH' should
simply write out: $PATH, and not whatever environment value $PATH
happens to be. This patch replaced '$' in single quoted strings with
the ASCII shift out (x0e) character. Any ASCII SO placeholder is
replaced with a '$' in recite(), after the environment variables have
been accounted for.
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The parser will now interpret the '#' character as a single-line comment
string, which works on it's own line, or at the end of an existing line.
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Rebuilt the LR parser (i.e. read()) from the ground up. This required
that some changes be made to recite(), in order to accomodate the new
data structures. These data structures were each split out into their
own file, in order to make working with each component a bit easier.
In addition to reworking the parts of the parser already present, some
new features were also added, such as:
- Support for strings (' and ")
- Support for environment variables ($)
- Support for interpreting tild as $HOME (~)
- Support for sub-reading and sub-reciting (`)
Notes:
This is a huge commit that changes almost the entire program (main.rs is
still the same, except for imports). Ideally, huge sweeping changes like
this should not occur on the codebase, but since this is still
pre-alpha, I guess this is acceptable. This is far from the end of
patch set, however, as there is quite a lot of cleanup that needs to be
done. For instance, checking for internal poems and environment
variables should get split out to their own functions/macros. There is
also some defunct code (that's commented out), that is unlikely to be
useful in the future.
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