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mal/logo/step0_repl.lg
Dov Murik 4eb88ef295 Logo implementation
Tested on UCBLogo 6.0 with some minor tweaks (for performance and adding
a `timems` function).  The tweaks are performed during Docker image
creation (see Dockerfile).

Tests of step 5 are skipped because UCBLogo is too slow.

Interop is available via `(logo-eval "logo code to run")`.

The `examples` directory contains a Mal example of drawing a tree using
turtle graphics.
2016-06-17 16:36:09 -04:00

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load "../logo/readline.lg
to _read :str
output :str
end
to _eval :ast :env
output :ast
end
to _print :exp
output :exp
end
to repl
localmake "running "true
while [:running] [
localmake "line readline word "user> :space_char
ifelse :line=[] [
print "
make "running "false
] [
if not emptyp :line [
print _print _eval _read :line []
]
]
]
end
repl
bye