TXR 263 2021-06-17 Features - New macro named flow, providing the syntactic sugar for using an opip function on a value. - I/O: - the *stdnull* stream lazily attaches to /dev/null if fileno is invoked on it - formatted printing: - format: new precision modifier - for zero instead of plus sign. - pic macro: takes advantae of format work to generate better code. - subprocesses: - some file descriptor saving-restoring manipulations moved into child process (in open-process, open-subprocess, run) - diagnostic for situation when *stdout*, *stdin* or *stderr* are redirected to something that cannot produce a file descriptor. - match-fun/txr-if - documented that input can be a stream - documented that input can be a single string - txr-case: - if input is a stream, it is now converted to a lazy list of lines, so that the txr-case construct effectively backtracks over the data as it tries successive cases. - command-line - new --noprofile option to invoke listner without processing ~/.txr_profile file. Bugs - format: numeric handling maintenance - poor behaviors identified and revised. - requirements clarified. - cemented in test cases. - exceptions: - unwind dynamic environment when tracing unhandled exception - solves problem when exception goes off while *stderr* is redirected. - subprocesses: - diagnostic for situation when *stdout*, *stdin* or *stderr* are redirected to something that cannot produce a file descriptor. - macros: - fixed TXR 191 regression in defsymacro: expanding the replacement form before associating it with the symbol, rather than taking as-is. - quasiliterals: - fixed issue arising when a macro invoked as a @(...) expression in a quasiliteral expands to a non-string atom. - math: - forbid dubious inequality comparisons like (< 1 "abc") which became unintentionally allowed due to numbers being iterable. TXR 262 2021-06-11 Features - structural pattern matching: - new feature: quasiquote matching. - JSON: - improved escaping of JSON output for safe embedding in