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mal/impls/wren/README.md
Joel Martin 8a19f60386 Move implementations into impls/ dir 
- Reorder README to have implementation list after "learning tool"
  bullet.

- This also moves tests/ and libs/ into impls. It would be preferrable
  to have these directories at the top level.  However, this causes
  difficulties with the wasm implementations which need pre-open
  directories and have trouble with paths starting with "../../". So
  in lieu of that, symlink those directories to the top-level.

- Move the run_argv_test.sh script into the tests directory for
  general hygiene.
2020-02-10 23:50:16 -06:00

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Wren implementation

Adding a time function

Since Wren doesn't have a time function, we add a System.gettimeofday function which returns a float with the number of seconds since epoch (with fractions of seconds).

This is done by applying the patch in wren-add-gettimeofday.path to Wren's source code before compiling it (see Dockerfile).

Wren interop

See examples in tests/stepA_mal.mal for usage of wren-eval to evaluate Wren expressions inside a Mal program.