mjb/altos/src/lisp, branch debian/1.9-1

altos/scheme: Rename to 'scheme', clean up build

2017-12-05T18:30:32+00:00

Constant block is now built in a subdir to avoid messing up source directory. Renamed to ao_scheme to reflect language target. Signed-off-by: Keith Packard

altos/lisp: Switch to scheme formal syntax for varargs

2017-12-04T03:54:18+00:00

Scheme uses bare symbols to indicate a varargs parameter; any bare (i.e., not wrapped in a cons cell) parameter will get the 'rest' of the parameter list. This works for lambdas, nlambdas and macros. As a result, the 'lexpr' form has been removed as it is equivalent to a lambda with a varargs formal. Signed-off-by: Keith Packard

altos/lisp: Fix stash usage across frame allocation

2017-12-04T03:52:11+00:00

Must un-stash before allocation failure check. Use frame_stash instead of poly_stash for frames. Signed-off-by: Keith Packard

altos/lisp: Check only cdr base type when moving cons cells

2017-12-04T03:49:20+00:00

The cdr may have moved, so we can't look at the target object type. Fortunately, the base type encoded in the reference itself is sufficient to check for a non-cons cdr. Signed-off-by: Keith Packard

altos/lisp: Split out read debug, add memory validation

2017-12-04T03:47:03+00:00

Split read debug into a separate #define to reduce debug noise Add some memory validation -- validate stash API, and validate cons_free calls. Signed-off-by: Keith Packard

altos/lisp: use strtof instead of atof

2017-12-03T05:21:55+00:00

atof returns double, strtof returns float. Signed-off-by: Keith Packard

altos/lisp: Convert more builtin lisp code to scheme format

2017-12-03T05:21:01+00:00

Use defines where possible, use (define (name args ...)) form for lambdas Signed-off-by: Keith Packard

altos/lisp: Overflow int computations to float

2017-12-03T05:19:44+00:00

When an int computation overflows, switch to float. Signed-off-by: Keith Packard

altos/lisp: split set/def. Add def support to lambdas

2017-12-01T21:40:23+00:00

In scheme, set can only re-define existing variables while def cannot redefine existing variables in lambda context. Def within lambda creates a new variable at the nearest enclosing scope. Signed-off-by: Keith Packard

altos/lisp: Split out frame vals from frame struct

2017-12-01T17:28:16+00:00

This lets the frame be resized without moving the base structure. The plan is to allow all frames to be resized, not just the global frame. Signed-off-by: Keith Packard