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py: Simplify some logic in compiler; add comments about CPython compat.

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This commit is contained in:
Damien George 2015-03-25 22:06:47 +00:00
parent 7f41f650de
commit aedf583af2
1 changed files with 8 additions and 11 deletions
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19
py/compile.c
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@ -732,9 +732,7 @@ STATIC void c_assign_power(compiler_t *comp, mp_parse_node_struct_t *pns, assign
assert(MP_PARSE_NODE_IS_STRUCT(pns1->nodes[n - 1]));
pns1 = (mp_parse_node_struct_t*)pns1->nodes[n - 1];
}
if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_paren) {
goto cannot_assign;
} else if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_bracket) {
if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_bracket) {
if (assign_kind == ASSIGN_AUG_STORE) {
EMIT(rot_three);
EMIT(store_subscr);
@ -818,9 +816,8 @@ STATIC void c_assign_tuple(compiler_t *comp, mp_parse_node_t node_head, uint num
// assigns top of stack to pn
STATIC void c_assign(compiler_t *comp, mp_parse_node_t pn, assign_kind_t assign_kind) {
tail_recursion:
if (MP_PARSE_NODE_IS_NULL(pn)) {
assert(0);
} else if (MP_PARSE_NODE_IS_LEAF(pn)) {
assert(!MP_PARSE_NODE_IS_NULL(pn));
if (MP_PARSE_NODE_IS_LEAF(pn)) {
if (MP_PARSE_NODE_IS_ID(pn)) {
qstr arg = MP_PARSE_NODE_LEAF_ARG(pn);
switch (assign_kind) {
@ -838,6 +835,7 @@ STATIC void c_assign(compiler_t *comp, mp_parse_node_t pn, assign_kind_t assign_
return;
}
} else {
// pn must be a struct
mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;
switch (MP_PARSE_NODE_STRUCT_KIND(pns)) {
case PN_power:
@ -1252,10 +1250,7 @@ STATIC void c_del_stmt(compiler_t *comp, mp_parse_node_t pn) {
assert(MP_PARSE_NODE_IS_STRUCT(pns1->nodes[n - 1]));
pns1 = (mp_parse_node_struct_t*)pns1->nodes[n - 1];
}
if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_paren) {
// can't delete function calls
goto cannot_delete;
} else if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_bracket) {
if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_bracket) {
compile_node(comp, pns1->nodes[0]);
EMIT(delete_subscr);
} else if (MP_PARSE_NODE_STRUCT_KIND(pns1) == PN_trailer_period) {
@ -1291,7 +1286,7 @@ STATIC void c_del_stmt(compiler_t *comp, mp_parse_node_t pn) {
c_del_stmt(comp, pns1->nodes[i]);
}
} else if (MP_PARSE_NODE_STRUCT_KIND(pns) == PN_comp_for) {
// TODO not implemented; can't del comprehension?
// TODO not implemented; can't del comprehension? can we get here?
goto cannot_delete;
} else {
// sequence with 2 items
@ -1570,6 +1565,7 @@ STATIC void compile_declare_global(compiler_t *comp, mp_parse_node_t pn, qstr qs
bool added;
id_info_t *id_info = scope_find_or_add_id(comp->scope_cur, qst, &added);
if (!added) {
// TODO this is not compliant with CPython
compile_syntax_error(comp, pn, "identifier already used");
return;
}
@ -1596,6 +1592,7 @@ STATIC void compile_declare_nonlocal(compiler_t *comp, mp_parse_node_t pn, qstr
bool added;
id_info_t *id_info = scope_find_or_add_id(comp->scope_cur, qst, &added);
if (!added) {
// TODO this is not compliant with CPython
compile_syntax_error(comp, pn, "identifier already used");
return;
}