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libsyntax: Parse tuple and unit structs

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This commit is contained in:
Patrick Walton 2012-08-15 17:10:23 -07:00
parent 913f7bdae7
commit a78030fbaa
2 changed files with 78 additions and 45 deletions
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118
src/libsyntax/parse/parser.rs
View File

@ -53,10 +53,11 @@
ty_infer, ty_mac, ty_method, ty_nil, ty_param, ty_param_bound,
ty_path, ty_ptr, ty_rec, ty_rptr, ty_tup, ty_u32, ty_uniq,
ty_vec, ty_fixed_length, tuple_variant_kind, unchecked_blk, uniq,
unsafe_blk, unsafe_fn, variant, view_item, view_item_,
view_item_export, view_item_import, view_item_use, view_path,
view_path_glob, view_path_list, view_path_simple, visibility,
vstore, vstore_box, vstore_fixed, vstore_slice, vstore_uniq};
unnamed_field, unsafe_blk, unsafe_fn, variant, view_item,
view_item_, view_item_export, view_item_import, view_item_use,
view_path, view_path_glob, view_path_list, view_path_simple,
visibility, vstore, vstore_box, vstore_fixed, vstore_slice,
vstore_uniq};
export file_type;
export parser;
@ -2563,53 +2564,81 @@ fn parse_item_class() -> item_info {
let traits : ~[@trait_ref] = if self.eat(token::COLON)
{ self.parse_trait_ref_list(token::LBRACE) }
else { ~[] };
self.expect(token::LBRACE);
let mut fields: ~[@struct_field] = ~[];
let mut fields: ~[@struct_field];
let mut methods: ~[@method] = ~[];
let mut the_ctor: option<(fn_decl, ~[attribute], blk, codemap::span)>
= none;
let mut the_dtor: option<(blk, ~[attribute], codemap::span)> = none;
let ctor_id = self.get_id();
let mut the_ctor : option<(fn_decl, ~[attribute], blk,
codemap::span)> = none;
let mut the_dtor : option<(blk, ~[attribute], codemap::span)> = none;
while self.token != token::RBRACE {
match self.parse_class_item(class_path) {
ctor_decl(a_fn_decl, attrs, blk, s) => {
match the_ctor {
some((_, _, _, s_first)) => {
self.span_note(s, #fmt("Duplicate constructor \
declaration for class %s", *class_name));
self.span_fatal(copy s_first, ~"First constructor \
declared here");
}
none => {
the_ctor = some((a_fn_decl, attrs, blk, s));
if self.eat(token::LBRACE) {
// It's a record-like struct.
fields = ~[];
while self.token != token::RBRACE {
match self.parse_class_item(class_path) {
ctor_decl(a_fn_decl, attrs, blk, s) => {
match the_ctor {
some((_, _, _, s_first)) => {
self.span_note(s, #fmt("Duplicate constructor \
declaration for class %s", *class_name));
self.span_fatal(copy s_first, ~"First constructor \
declared here");
}
none => {
the_ctor = some((a_fn_decl, attrs, blk, s));
}
}
}
dtor_decl(blk, attrs, s) => {
match the_dtor {
some((_, _, s_first)) => {
self.span_note(s, #fmt("Duplicate destructor \
declaration for class %s", *class_name));
self.span_fatal(copy s_first, ~"First destructor \
declared here");
}
none => {
the_dtor = some((blk, attrs, s));
}
}
}
members(mms) => {
for mms.each |mm| {
match mm {
@field_member(struct_field) =>
vec::push(fields, struct_field),
@method_member(the_method_member) =>
vec::push(methods, the_method_member)
}
}
}
}
dtor_decl(blk, attrs, s) => {
match the_dtor {
some((_, _, s_first)) => {
self.span_note(s, #fmt("Duplicate destructor \
declaration for class %s", *class_name));
self.span_fatal(copy s_first, ~"First destructor \
declared here");
}
none => {
the_dtor = some((blk, attrs, s));
}
}
}
members(mms) => {
for mms.each |mm| {
match mm {
@field_member(struct_field) =>
vec::push(fields, struct_field),
@method_member(the_method_member) =>
vec::push(methods, the_method_member)
}
}
}
}
self.bump();
} else if self.token == token::LPAREN {
// It's a tuple-like struct.
fields = do self.parse_unspanned_seq(token::LPAREN, token::RPAREN,
seq_sep_trailing_allowed
(token::COMMA)) |p| {
let lo = p.span.lo;
let struct_field_ = {
kind: unnamed_field,
id: self.get_id(),
ty: p.parse_ty(false)
};
@spanned(lo, p.span.hi, struct_field_)
};
self.expect(token::SEMI);
} else if self.eat(token::SEMI) {
// It's a unit-like struct.
fields = ~[];
} else {
self.fatal(fmt!("expected `{`, `(`, or `;` after struct name \
but found `%s`",
token_to_str(self.reader, self.token)));
}
let actual_dtor = do option::map(the_dtor) |dtor| {
let (d_body, d_attrs, d_s) = dtor;
{node: {id: self.get_id(),
@ -2617,7 +2646,6 @@ fn parse_item_class() -> item_info {
self_id: self.get_id(),
body: d_body},
span: d_s}};
self.bump();
match the_ctor {
some((ct_d, ct_attrs, ct_b, ct_s)) => {
(class_name,

5
src/test/run-pass/tuple-struct-trivial.rs Normal file
View File

@ -0,0 +1,5 @@
struct Foo(int, int, int);
fn main() {
}