Commit Graph

22 Commits

Author SHA1 Message Date
Damien George
0c1de1cdee py: Simplify "and" action within parser by making ident-rules explicit.
Most grammar rules can optimise to the identity if they only have a single
argument, saving a lot of RAM building the parse tree.  Previous to this
patch, whether a given grammar rule could be optimised was defined (mostly
implicitly) by a complicated set of logic rules.  With this patch the
definition is always specified explicitly by using "and_ident" in the rule
definition in the grammar.  This simplifies the logic of the parser,
making it a bit smaller and faster.  RAM usage in unaffected.
2016-04-14 13:49:23 +01:00
pohmelie
81ebba7e02 py: add async/await/async for/async with syntax
They are sugar for marking function as generator, "yield from"
and pep492 python "semantically equivalents" respectively.

@dpgeorge was the original author of this patch, but @pohmelie made
changes to implement `async for` and `async with`.
2016-04-13 15:26:38 +01:00
Damien George
3acaa28b52 py: Don't allocate an extra parse node for power exponent.
Previous to this patch, the "**b" in "a**b" had its own parse node with
just one item (the "b").  Now, the "b" is just the last element of the
power parse-node.  This saves (a tiny bit of) RAM when compiling.
2016-03-16 13:04:51 +00:00
Damien George
9a56912ad1 py/compile: Do proper checking of * and ** in function definition.
This patch checks that there is only one *, and that ** is last in the
arg list.
2015-11-23 16:50:42 +00:00
Damien George
2c83894257 py: Implement default and star args for lambdas. 2015-11-17 14:00:14 +00:00
Damien George
b948de36fb py: Don't generate unnecessary parse nodes for assignment or kwargs.
This patch eliminates the need for a nested parse node for assignments
and keyword arguments.  It saves a little bit of RAM when parsing.
2015-10-08 14:26:01 +01:00
Damien George
96f0dd3cbc py/parse: Fix handling of empty input so it raises an exception. 2015-07-24 15:05:56 +00:00
Damien George
4735c45c51 py: Clean up some bits and pieces in parser, grammar. 2015-04-21 16:43:18 +00:00
Damien George
fa90ab1407 py: Simplify grammar for stmt rule (this is also how CPython has it). 2015-04-21 16:35:50 +00:00
Damien George
7d414a1b52 py: Parse big-int/float/imag constants directly in parser.
Previous to this patch, a big-int, float or imag constant was interned
(made into a qstr) and then parsed at runtime to create an object each
time it was needed.  This is wasteful in RAM and not efficient.  Now,
these constants are parsed straight away in the parser and turned into
objects.  This allows constants with large numbers of digits (so
addresses issue #1103) and takes us a step closer to #722.
2015-02-08 01:57:40 +00:00
Damien George
83204f3406 py: Allow to properly disable builtin slice operation.
This patch makes the MICROPY_PY_BUILTINS_SLICE compile-time option
fully disable the builtin slice operation (when set to 0).  This
includes removing the slice sytanx from the grammar.  Now, enabling
slice costs 4228 bytes on unix x64, and 1816 bytes on stmhal.
2014-12-27 17:33:30 +00:00
Damien George
e37dcaafb4 py: Allow to properly disable builtin "set" object.
This patch makes MICROPY_PY_BUILTINS_SET compile-time option fully
disable the builtin set object (when set to 0).  This includes removing
set constructor/comprehension from the grammar, the compiler and the
emitters.  Now, enabling set costs 8168 bytes on unix x64, and 3576
bytes on stmhal.
2014-12-27 17:33:30 +00:00
Damien George
b47ea4eadd py: Add blank and ident flags to grammar rules to simplify parser.
This saves around 100 bytes code space on stmhal, more on unix.
2014-12-20 18:37:50 +00:00
Damien George
04b9147e15 Add license header to (almost) all files.
Blanket wide to all .c and .h files.  Some files originating from ST are
difficult to deal with (license wise) so it was left out of those.

Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
2014-05-03 23:27:38 +01:00
Damien George
2c0842b3c5 py: Change the way function arguments are compiled.
New way uses slightly less ROM and RAM, should be slightly faster, and,
most importantly, allows to catch the error "non-keyword arg following
keyword arg".

Addresses issue #466.
2014-04-27 16:46:51 +01:00
Paul Sokolovsky
2f0b026a44 Clean up handling of function return type annotation. 2014-02-10 02:04:26 +02:00
Damien George
35e2a4e6bb py: Add built-in super. 2014-02-05 00:51:47 +00:00
Damien George
d02c6d8962 Implement eval. 2014-01-15 22:14:03 +00:00
Damien George
e9906ac3d7 Add ellipsis object. 2014-01-04 18:44:46 +00:00
Damien
e388f1034e py: fix bug with doc string not recognised after first newline of file. 2013-12-12 15:24:38 +00:00
Damien
3997be444c Add single_input rule to grammar, for REPL. 2013-10-18 19:56:48 +01:00
Damien
429d71943d Initial commit. 2013-10-04 19:53:11 +01:00