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py, parser: Add commented-out code to discard doc strings. 

Doesn't help with RAM reduction because doc strings are interned as soon
as they are encountered, which is too soon to do any optimisations on
them.
This commit is contained in:
Damien George 2014-05-06 21:44:11 +01:00
parent c53b408f28
commit 93afa230a4
1 changed files with 14 additions and 0 deletions
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14
py/parse.c
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@ -511,6 +511,20 @@ mp_parse_node_t mp_parse(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, mp_p
}
}
#if 0 && !MICROPY_ENABLE_DOC_STRING
// this code discards lonely statement, such as doc strings
// problem is that doc strings have already been interned, so this doesn't really help reduce RAM usage
if (input_kind != MP_PARSE_SINGLE_INPUT && rule->rule_id == RULE_expr_stmt && peek_result(parser, 0) == MP_PARSE_NODE_NULL) {
mp_parse_node_t p = peek_result(parser, 1);
if (MP_PARSE_NODE_IS_LEAF(p) && !MP_PARSE_NODE_IS_ID(p)) {
pop_result(parser);
pop_result(parser);
push_result_rule(parser, rule_src_line, rules[RULE_pass_stmt], 0);
break;
}
}
#endif
// always emit these rules, even if they have only 1 argument
if (rule->rule_id == RULE_expr_stmt || rule->rule_id == RULE_yield_stmt) {
emit_rule = true;