Mercurial > cpython-lru_cache-weakref
diff Python/compile.c @ 14099:468481135c49 legacy-trunk
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.
| author | Barry Warsaw <barry@python.org> |
|---|---|
| date | Mon, 21 Aug 2000 15:38:56 +0000 |
| parents | b678491f7e11 |
| children | d809b9b75b99 |
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--- a/Python/compile.c Mon Aug 21 15:36:27 2000 +0000 +++ b/Python/compile.c Mon Aug 21 15:38:56 2000 +0000 @@ -2047,16 +2047,44 @@ 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; } - if (TYPE(CHILD(n, NCH(n)-1)) != COMMA) - com_addbyte(c, PRINT_NEWLINE); - /* XXX Alternatively, LOAD_CONST '\n' and then PRINT_ITEM */ + 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); + } } static void