diff --git a/src/librustc/middle/lang_items.rs b/src/librustc/middle/lang_items.rs index d8eaffd5563cb..72471123a3e02 100644 --- a/src/librustc/middle/lang_items.rs +++ b/src/librustc/middle/lang_items.rs @@ -34,66 +34,26 @@ use std::hashmap::HashMap; use std::iter::Enumerate; use std::vec; +// The actual lang items defined come at the end of this file in one handy table. +// So you probably just want to nip down to the end. +macro_rules! lets_do_this { + ( + There are $num_lang_items:expr lang items. + $( $num:pat, $variant:ident, $name:expr, $method:ident; )* + ) => { + pub enum LangItem { - FreezeTraitLangItem, // 0 - SendTraitLangItem, // 1 - SizedTraitLangItem, // 2 - - DropTraitLangItem, // 3 - - AddTraitLangItem, // 4 - SubTraitLangItem, // 5 - MulTraitLangItem, // 6 - DivTraitLangItem, // 7 - RemTraitLangItem, // 8 - NegTraitLangItem, // 9 - NotTraitLangItem, // 10 - BitXorTraitLangItem, // 11 - BitAndTraitLangItem, // 12 - BitOrTraitLangItem, // 13 - ShlTraitLangItem, // 14 - ShrTraitLangItem, // 15 - IndexTraitLangItem, // 16 - - EqTraitLangItem, // 17 - OrdTraitLangItem, // 18 - - StrEqFnLangItem, // 19 - UniqStrEqFnLangItem, // 20 - FailFnLangItem, // 21 - FailBoundsCheckFnLangItem, // 22 - ExchangeMallocFnLangItem, // 23 - ClosureExchangeMallocFnLangItem, // 24 - ExchangeFreeFnLangItem, // 25 - MallocFnLangItem, // 26 - FreeFnLangItem, // 27 - BorrowAsImmFnLangItem, // 28 - BorrowAsMutFnLangItem, // 29 - ReturnToMutFnLangItem, // 30 - CheckNotBorrowedFnLangItem, // 31 - StrDupUniqFnLangItem, // 32 - RecordBorrowFnLangItem, // 33 - UnrecordBorrowFnLangItem, // 34 - - StartFnLangItem, // 35 - - TyDescStructLangItem, // 36 - TyVisitorTraitLangItem, // 37 - OpaqueStructLangItem, // 38 - - EventLoopFactoryLangItem, // 39 - - TypeIdLangItem, // 40 + $($variant),* } pub struct LanguageItems { - items: [Option, ..41] + items: [Option, ..$num_lang_items] } impl LanguageItems { pub fn new() -> LanguageItems { LanguageItems { - items: [ None, ..41 ] + items: [ None, ..$num_lang_items ] } } @@ -103,61 +63,11 @@ impl LanguageItems { pub fn item_name(index: uint) -> &'static str { match index { - 0 => "freeze", - 1 => "send", - 2 => "sized", - - 3 => "drop", - - 4 => "add", - 5 => "sub", - 6 => "mul", - 7 => "div", - 8 => "rem", - 9 => "neg", - 10 => "not", - 11 => "bitxor", - 12 => "bitand", - 13 => "bitor", - 14 => "shl", - 15 => "shr", - 16 => "index", - 17 => "eq", - 18 => "ord", - - 19 => "str_eq", - 20 => "uniq_str_eq", - 21 => "fail_", - 22 => "fail_bounds_check", - 23 => "exchange_malloc", - 24 => "closure_exchange_malloc", - 25 => "exchange_free", - 26 => "malloc", - 27 => "free", - 28 => "borrow_as_imm", - 29 => "borrow_as_mut", - 30 => "return_to_mut", - 31 => "check_not_borrowed", - 32 => "strdup_uniq", - 33 => "record_borrow", - 34 => "unrecord_borrow", - - 35 => "start", - - 36 => "ty_desc", - 37 => "ty_visitor", - 38 => "opaque", - - 39 => "event_loop_factory", - - 40 => "type_id", - + $( $num => $name, )* _ => "???" } } - // FIXME #4621: Method macros sure would be nice here. - pub fn require(&self, it: LangItem) -> Result { match self.items[it as uint] { Some(id) => Ok(id), @@ -178,133 +88,11 @@ impl LanguageItems { } } - pub fn freeze_trait(&self) -> Option { - self.items[FreezeTraitLangItem as uint] - } - pub fn send_trait(&self) -> Option { - self.items[SendTraitLangItem as uint] - } - pub fn sized_trait(&self) -> Option { - self.items[SizedTraitLangItem as uint] - } - - pub fn drop_trait(&self) -> Option { - self.items[DropTraitLangItem as uint] - } - - pub fn add_trait(&self) -> Option { - self.items[AddTraitLangItem as uint] - } - pub fn sub_trait(&self) -> Option { - self.items[SubTraitLangItem as uint] - } - pub fn mul_trait(&self) -> Option { - self.items[MulTraitLangItem as uint] - } - pub fn div_trait(&self) -> Option { - self.items[DivTraitLangItem as uint] - } - pub fn rem_trait(&self) -> Option { - self.items[RemTraitLangItem as uint] - } - pub fn neg_trait(&self) -> Option { - self.items[NegTraitLangItem as uint] - } - pub fn not_trait(&self) -> Option { - self.items[NotTraitLangItem as uint] - } - pub fn bitxor_trait(&self) -> Option { - self.items[BitXorTraitLangItem as uint] - } - pub fn bitand_trait(&self) -> Option { - self.items[BitAndTraitLangItem as uint] - } - pub fn bitor_trait(&self) -> Option { - self.items[BitOrTraitLangItem as uint] - } - pub fn shl_trait(&self) -> Option { - self.items[ShlTraitLangItem as uint] - } - pub fn shr_trait(&self) -> Option { - self.items[ShrTraitLangItem as uint] - } - pub fn index_trait(&self) -> Option { - self.items[IndexTraitLangItem as uint] - } - - pub fn eq_trait(&self) -> Option { - self.items[EqTraitLangItem as uint] - } - pub fn ord_trait(&self) -> Option { - self.items[OrdTraitLangItem as uint] - } - - pub fn str_eq_fn(&self) -> Option { - self.items[StrEqFnLangItem as uint] - } - pub fn uniq_str_eq_fn(&self) -> Option { - self.items[UniqStrEqFnLangItem as uint] - } - pub fn fail_fn(&self) -> Option { - self.items[FailFnLangItem as uint] - } - pub fn fail_bounds_check_fn(&self) -> Option { - self.items[FailBoundsCheckFnLangItem as uint] - } - pub fn exchange_malloc_fn(&self) -> Option { - self.items[ExchangeMallocFnLangItem as uint] - } - pub fn closure_exchange_malloc_fn(&self) -> Option { - self.items[ClosureExchangeMallocFnLangItem as uint] - } - pub fn exchange_free_fn(&self) -> Option { - self.items[ExchangeFreeFnLangItem as uint] - } - pub fn malloc_fn(&self) -> Option { - self.items[MallocFnLangItem as uint] - } - pub fn free_fn(&self) -> Option { - self.items[FreeFnLangItem as uint] - } - pub fn borrow_as_imm_fn(&self) -> Option { - self.items[BorrowAsImmFnLangItem as uint] - } - pub fn borrow_as_mut_fn(&self) -> Option { - self.items[BorrowAsMutFnLangItem as uint] - } - pub fn return_to_mut_fn(&self) -> Option { - self.items[ReturnToMutFnLangItem as uint] - } - pub fn check_not_borrowed_fn(&self) -> Option { - self.items[CheckNotBorrowedFnLangItem as uint] - } - pub fn strdup_uniq_fn(&self) -> Option { - self.items[StrDupUniqFnLangItem as uint] - } - pub fn record_borrow_fn(&self) -> Option { - self.items[RecordBorrowFnLangItem as uint] - } - pub fn unrecord_borrow_fn(&self) -> Option { - self.items[UnrecordBorrowFnLangItem as uint] - } - pub fn start_fn(&self) -> Option { - self.items[StartFnLangItem as uint] - } - pub fn ty_desc(&self) -> Option { - self.items[TyDescStructLangItem as uint] - } - pub fn ty_visitor(&self) -> Option { - self.items[TyVisitorTraitLangItem as uint] - } - pub fn opaque(&self) -> Option { - self.items[OpaqueStructLangItem as uint] - } - pub fn event_loop_factory(&self) -> Option { - self.items[EventLoopFactoryLangItem as uint] - } - pub fn type_id(&self) -> Option { - self.items[TypeIdLangItem as uint] - } + $( + pub fn $method(&self) -> Option { + self.items[$variant as uint] + } + )* } struct LanguageItemCollector { @@ -343,53 +131,7 @@ impl LanguageItemCollector { pub fn new(session: Session) -> LanguageItemCollector { let mut item_refs = HashMap::new(); - item_refs.insert("freeze", FreezeTraitLangItem as uint); - item_refs.insert("send", SendTraitLangItem as uint); - item_refs.insert("sized", SizedTraitLangItem as uint); - - item_refs.insert("drop", DropTraitLangItem as uint); - - item_refs.insert("add", AddTraitLangItem as uint); - item_refs.insert("sub", SubTraitLangItem as uint); - item_refs.insert("mul", MulTraitLangItem as uint); - item_refs.insert("div", DivTraitLangItem as uint); - item_refs.insert("rem", RemTraitLangItem as uint); - item_refs.insert("neg", NegTraitLangItem as uint); - item_refs.insert("not", NotTraitLangItem as uint); - item_refs.insert("bitxor", BitXorTraitLangItem as uint); - item_refs.insert("bitand", BitAndTraitLangItem as uint); - item_refs.insert("bitor", BitOrTraitLangItem as uint); - item_refs.insert("shl", ShlTraitLangItem as uint); - item_refs.insert("shr", ShrTraitLangItem as uint); - item_refs.insert("index", IndexTraitLangItem as uint); - - item_refs.insert("eq", EqTraitLangItem as uint); - item_refs.insert("ord", OrdTraitLangItem as uint); - - item_refs.insert("str_eq", StrEqFnLangItem as uint); - item_refs.insert("uniq_str_eq", UniqStrEqFnLangItem as uint); - item_refs.insert("fail_", FailFnLangItem as uint); - item_refs.insert("fail_bounds_check", - FailBoundsCheckFnLangItem as uint); - item_refs.insert("exchange_malloc", ExchangeMallocFnLangItem as uint); - item_refs.insert("closure_exchange_malloc", ClosureExchangeMallocFnLangItem as uint); - item_refs.insert("exchange_free", ExchangeFreeFnLangItem as uint); - item_refs.insert("malloc", MallocFnLangItem as uint); - item_refs.insert("free", FreeFnLangItem as uint); - item_refs.insert("borrow_as_imm", BorrowAsImmFnLangItem as uint); - item_refs.insert("borrow_as_mut", BorrowAsMutFnLangItem as uint); - item_refs.insert("return_to_mut", ReturnToMutFnLangItem as uint); - item_refs.insert("check_not_borrowed", - CheckNotBorrowedFnLangItem as uint); - item_refs.insert("strdup_uniq", StrDupUniqFnLangItem as uint); - item_refs.insert("record_borrow", RecordBorrowFnLangItem as uint); - item_refs.insert("unrecord_borrow", UnrecordBorrowFnLangItem as uint); - item_refs.insert("start", StartFnLangItem as uint); - item_refs.insert("ty_desc", TyDescStructLangItem as uint); - item_refs.insert("ty_visitor", TyVisitorTraitLangItem as uint); - item_refs.insert("opaque", OpaqueStructLangItem as uint); - item_refs.insert("event_loop_factory", EventLoopFactoryLangItem as uint); - item_refs.insert("type_id", TypeIdLangItem as uint); + $( item_refs.insert($name, $variant as uint); )* LanguageItemCollector { session: session, @@ -458,3 +200,62 @@ pub fn collect_language_items(crate: &ast::Crate, session.abort_if_errors(); items } + +// End of the macro + } +} + +lets_do_this! { + There are 41 lang items. + +// ID, Variant name, Name, Method name; + 0, FreezeTraitLangItem, "freeze", freeze_trait; + 1, SendTraitLangItem, "send", send_trait; + 2, SizedTraitLangItem, "sized", sized_trait; + + 3, DropTraitLangItem, "drop", drop_trait; + + 4, AddTraitLangItem, "add", add_trait; + 5, SubTraitLangItem, "sub", sub_trait; + 6, MulTraitLangItem, "mul", mul_trait; + 7, DivTraitLangItem, "div", div_trait; + 8, RemTraitLangItem, "rem", rem_trait; + 9, NegTraitLangItem, "neg", neg_trait; + 10, NotTraitLangItem, "not", not_trait; + 11, BitXorTraitLangItem, "bitxor", bitxor_trait; + 12, BitAndTraitLangItem, "bitand", bitand_trait; + 13, BitOrTraitLangItem, "bitor", bitor_trait; + 14, ShlTraitLangItem, "shl", shl_trait; + 15, ShrTraitLangItem, "shr", shr_trait; + 16, IndexTraitLangItem, "index", index_trait; + + 17, EqTraitLangItem, "eq", eq_trait; + 18, OrdTraitLangItem, "ord", ord_trait; + + 19, StrEqFnLangItem, "str_eq", str_eq_fn; + 20, UniqStrEqFnLangItem, "uniq_str_eq", uniq_str_eq_fn; + 21, FailFnLangItem, "fail_", fail_fn; + 22, FailBoundsCheckFnLangItem, "fail_bounds_check", fail_bounds_check_fn; + 23, ExchangeMallocFnLangItem, "exchange_malloc", exchange_malloc_fn; + 24, ClosureExchangeMallocFnLangItem, "closure_exchange_malloc", closure_exchange_malloc_fn; + 25, ExchangeFreeFnLangItem, "exchange_free", exchange_free_fn; + 26, MallocFnLangItem, "malloc", malloc_fn; + 27, FreeFnLangItem, "free", free_fn; + 28, BorrowAsImmFnLangItem, "borrow_as_imm", borrow_as_imm_fn; + 29, BorrowAsMutFnLangItem, "borrow_as_mut", borrow_as_mut_fn; + 30, ReturnToMutFnLangItem, "return_to_mut", return_to_mut_fn; + 31, CheckNotBorrowedFnLangItem, "check_not_borrowed", check_not_borrowed_fn; + 32, StrDupUniqFnLangItem, "strdup_uniq", strdup_uniq_fn; + 33, RecordBorrowFnLangItem, "record_borrow", record_borrow_fn; + 34, UnrecordBorrowFnLangItem, "unrecord_borrow", unrecord_borrow_fn; + + 35, StartFnLangItem, "start", start_fn; + + 36, TyDescStructLangItem, "ty_desc", ty_desc; + 37, TyVisitorTraitLangItem, "ty_visitor", ty_visitor; + 38, OpaqueStructLangItem, "opaque", opaque; + + 39, EventLoopFactoryLangItem, "event_loop_factory", event_loop_factory; + + 40, TypeIdLangItem, "type_id", type_id; +}