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Array slicing. Closes #2.

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Stephen Dolan committed 2013-05-13 20:16:19 +01:00
1 parent a47cfa4757
commit 33901b74b1
4 files changed
+180 -16
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parser.y
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@@ -141,6 +141,17 @@ static block gen_index(block obj, block key) {
return BLOCK(gen_subexp(key), obj, gen_op_simple(INDEX));
}
static block gen_slice_index(block obj, block start, block end) {
block key = BLOCK(gen_subexp(gen_const(jv_object())),
gen_subexp(gen_const(jv_string("start"))),
gen_subexp(start),
gen_op_simple(INSERT),
gen_subexp(gen_const(jv_string("end"))),
gen_subexp(end),
gen_op_simple(INSERT));
return BLOCK(key, obj, gen_op_simple(INDEX));
}
static block gen_binop(block a, block b, int op) {
const char* funcname = 0;
switch (op) {
@@ -408,6 +419,15 @@ Term '[' Exp ']' {
Term '[' ']' {
$$ = block_join($1, gen_op_simple(EACH));
} |
Term '[' Exp ':' Exp ']' {
$$ = gen_slice_index($1, $3, $5);
} |
Term '[' Exp ':' ']' {
$$ = gen_slice_index($1, $3, gen_const(jv_null()));
} |
Term '[' ':' Exp ']' {
$$ = gen_slice_index($1, gen_const(jv_null()), $4);
} |
LITERAL {
$$ = gen_const($1);
} |