87229e4b3a
* gash/arithmetic.scm: New file.
* Makefile.am (SOURCES): Add it.
* gash/lexer.scm (get-arithmetic-expansion): New procedure.
(get-expansion): Check for "$((" and use the new procedure to read an
arithmetic expansion.
* gash/eval.scm (word->qword): Handle '<sh-arithmetic>'.
* tests/unit/eval.scm: Add tests.
* tests/spec/Makefile.am (TESTS): Add 'arith'.
* tests/spec/oil.scm: Patch seven of its tests and filter out fifteen
others.
* doc/gash.texi, doc/syntax.txt: Add '<sh-arithmetic>' syntax.
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| .. | ||
| Makefile.am | ||
| check-spec | ||
| oil.scm | ||