bjoernager/rust
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Parse anonymous objs in statement position

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Closes #761
This commit is contained in:
Marijn Haverbeke 2011-07-29 15:01:06 +02:00
parent 451ec03c2d
commit 48cc11631c
1 changed files with 21 additions and 32 deletions
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53
src/comp/syntax/parse/parser.rs
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@ -883,8 +883,7 @@ fn parse_bottom_expr(p: &parser) -> @ast::expr {
// We don't need to pull ".node" out of fields because it's not a
// "spanned".
let ob: ast::anon_obj =
{fields: fields, methods: meths, inner_obj: inner_obj};
let ob = {fields: fields, methods: meths, inner_obj: inner_obj};
ex = ast::expr_anon_obj(ob);
} else if (eat_word(p, "bind")) {
let e = parse_expr_res(p, RESTRICT_NO_CALL_EXPRS);
@ -1554,27 +1553,20 @@ fn parse_source_stmt(p: &parser) -> @ast::stmt {
// If we have attributes then we should have an item
if ivec::len(item_attrs) > 0u {
alt maybe_item {
got_item(_) {/* fallthrough */ }
some(_) {/* fallthrough */ }
_ { ret p.fatal("expected item"); }
}
}
alt maybe_item {
got_item(i) {
some(i) {
let hi = i.span.hi;
let decl = @spanned(lo, hi, ast::decl_item(i));
ret @spanned(lo, hi, ast::stmt_decl(decl, p.get_id()));
}
fn_no_item. { // parse_item will have already skipped "fn"
let e = parse_fn_expr(p, ast::proto_fn);
e = parse_dot_or_call_expr_with(p, e);
ret @spanned(lo, e.span.hi, ast::stmt_expr(e, p.get_id()));
}
no_item. {
none. {
// Remainder are line-expr stmts.
let e = parse_expr(p);
ret @spanned(lo, e.span.hi, ast::stmt_expr(e, p.get_id()));
}
@ -1873,7 +1865,7 @@ fn parse_mod_items(p: &parser, term: token::token,
let attrs = initial_attrs + parse_outer_attributes(p);
initial_attrs = ~[];
alt parse_item(p, attrs) {
got_item(i) { items += ~[i]; }
some(i) { items += ~[i]; }
_ {
p.fatal("expected item but found " +
token::to_str(p.get_reader(), p.peek()));
@ -2082,37 +2074,34 @@ fn parse_auth(p: &parser) -> ast::_auth {
fail;
}
tag parsed_item { got_item(@ast::item); no_item; fn_no_item; }
fn parse_item(p: &parser, attrs: &ast::attribute[]) -> parsed_item {
fn parse_item(p: &parser, attrs: &ast::attribute[]) -> option::t[@ast::item] {
if eat_word(p, "const") {
ret got_item(parse_item_const(p, attrs));
} else if (eat_word(p, "fn")) {
// This is an anonymous function
if p.peek() == token::LPAREN { ret fn_no_item; }
ret got_item(parse_item_fn_or_iter(p, ast::impure_fn, ast::proto_fn,
ret some(parse_item_const(p, attrs));
} else if (is_word(p, "fn") && p.look_ahead(1u) != token::LPAREN) {
p.bump();
ret some(parse_item_fn_or_iter(p, ast::impure_fn, ast::proto_fn,
attrs));
} else if (eat_word(p, "pred")) {
ret got_item(parse_item_fn_or_iter(p, ast::pure_fn, ast::proto_fn,
ret some(parse_item_fn_or_iter(p, ast::pure_fn, ast::proto_fn,
attrs));
} else if (eat_word(p, "iter")) {
ret got_item(parse_item_fn_or_iter(p, ast::impure_fn, ast::proto_iter,
ret some(parse_item_fn_or_iter(p, ast::impure_fn, ast::proto_iter,
attrs));
} else if (eat_word(p, "mod")) {
ret got_item(parse_item_mod(p, attrs));
ret some(parse_item_mod(p, attrs));
} else if (eat_word(p, "native")) {
ret got_item(parse_item_native_mod(p, attrs));
ret some(parse_item_native_mod(p, attrs));
}
if eat_word(p, "type") {
ret got_item(parse_item_type(p, attrs));
ret some(parse_item_type(p, attrs));
} else if (eat_word(p, "tag")) {
ret got_item(parse_item_tag(p, attrs));
} else if (eat_word(p, "obj")) {
ret got_item(parse_item_obj(p, attrs));
ret some(parse_item_tag(p, attrs));
} else if (is_word(p, "obj") && p.look_ahead(1u) != token::LPAREN) {
p.bump();
ret some(parse_item_obj(p, attrs));
} else if (eat_word(p, "resource")) {
ret got_item(parse_item_res(p, attrs));
} else { ret no_item; }
ret some(parse_item_res(p, attrs));
} else { ret none; }
}
// A type to distingush between the parsing of item attributes or syntax