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PEP 214, Extended print Statement, has been accepted by the BDFL. 

com_print_stmt(): Implement recognition of, and byte compilation for,
extended print using new byte codes PRINT_ITEM_TO and
PRINT_NEWLINE_TO.
This commit is contained in:
Barry Warsaw 2000-08-21 15:38:56 +00:00
parent 35fd665981
commit 29c574e30c
1 changed files with 36 additions and 8 deletions
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44
Python/compile.c
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@ -2047,16 +2047,44 @@ com_assert_stmt(struct compiling *c, node *n)
static void
com_print_stmt(struct compiling *c, node *n)
{
int i;
int i = 1;
node* stream = NULL;
REQ(n, print_stmt); /* 'print' (test ',')* [test] */
for (i = 1; i < NCH(n); i += 2) {
com_node(c, CHILD(n, i));
com_addbyte(c, PRINT_ITEM);
com_pop(c, 1);
/* are we using the extended print form? */
if (NCH(n) >= 2 && TYPE(CHILD(n, 1)) == RIGHTSHIFT) {
stream = CHILD(n, 2);
if (NCH(n) > 3 && TYPE(CHILD(n, 3)) == COMMA)
i = 4;
else
i = 3;
}
for (; i < NCH(n); i += 2) {
if (stream != NULL) {
/* stack: [...] => [... obj stream] */
com_node(c, CHILD(n, i));
com_node(c, stream);
com_addbyte(c, PRINT_ITEM_TO);
com_pop(c, 2);
}
else {
/* stack: [...] => [... obj] */
com_node(c, CHILD(n, i));
com_addbyte(c, PRINT_ITEM);
com_pop(c, 1);
}
}
/* XXX Alternatively, LOAD_CONST '\n' and then PRINT_ITEM */
if (TYPE(CHILD(n, NCH(n)-1)) != COMMA) {
if (stream != NULL) {
com_node(c, stream);
com_addbyte(c, PRINT_NEWLINE_TO);
com_pop(c, 1);
}
else
com_addbyte(c, PRINT_NEWLINE);
}
if (TYPE(CHILD(n, NCH(n)-1)) != COMMA)
com_addbyte(c, PRINT_NEWLINE);
/* XXX Alternatively, LOAD_CONST '\n' and then PRINT_ITEM */
}
static void