ml

is a small lisp interpreter based on Adam McDaniel's wisp interpreter (https://github.com/adam-mcdaniel/wisp). It's main purpose is to learn something about more recent c++

Example of use

cat <<EOT > /tmp/qs.lsp
(defn qs (l)
    (if (<= (len l) 1)
        l
        (do
            (def pivot (first l))
            (+
                (qs (filter (lambda (n) (> pivot n)) l))
                (list pivot)
                (qs (tail (filter (lambda (n) (<= pivot n)) l)))
            ))
    ))

(print (qs '(10 9 8 7 6 5 4 3 2 10)))
EOT

ml -f /tmp/qs.lsp

or

ml -f tests/test.lsp

Interactive mode

ml

Documentation

see /doc/Doc.md

Dependencies

• libssl-dev

Compile

gcc -std=c99 -c -O2 -o linenoise.o clib/linenoise.c
c++ -c -O2  -I/usr/local/opt/openssl/include -Iclib -I./ --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp ml_util.cpp ml_profiler.cpp ml_usql.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp clib/printf.cpp clib/sslclient.cpp clib/tcpnet.cpp usql/exception.cpp usql/lexer.cpp usql/parser.cpp usql/usql.cpp usql/table.cpp usql/table.h usql/row.cpp usql/csvreader.cpp usql/usql.cpp usql/usql_ddl.cpp usql/usql_dml.cpp usql/usql_function.cpp  usql/settings.cpp

// on linux c++ -o ml -O2 -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl *.o
c++ -o build/ml -O2 -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 *.o

or use

cmake .
make

Install

cp build/ml /usr/local/bin/ml
cp stdlib/*.lsp /usr/local/var/mlisp/
cp doc/*.md /usr/local/var/mlisp/

or

utils/local_install.sh

KNOWNN BUGS

• (read-url "https://api.nasdaq.com/api/calendar/dividends/") ; hangs in sslclient.cpp line 132

TODO

• order of arguments in functions like member and filter - filter swap lambda and list
• add possibility to specify filename for input2 history file
• better output of !e in repl (resp !e !ee)
• unify -f and -run options
• add debug support, at least call stack
• add mem stats to benchmark
• execute system command should capture stderr
• multiline editing (see kilocpp editor)

Doc

• add functions from stdlib into doc
• doc for set!

Code

• tcpnet should use RAII
• add more unit test, especially for usql
• add instrumentation (time, nr of evals, num of atoms, debug info, debug environment etc)

Language

• string functions
  • regexp match, regexp tokens

Performance

• push_back - repeatedly without reserving size
• mini_sprintf - unnecesary copying between vector and list
• (do, scope, cond ..) repeatedly assign to acc

Links

https://github.com/adam-mcdaniel/wisp
https://github.com/dropbox/json11
https://github.com/antirez/linenoise

read stdout and stderr from popen

https://stackoverflow.com/questions/478898how-do-i-execute-a-command-and-get-the-output-of-the-command-within-c-using-po