427 lines
14 KiB
Rust
427 lines
14 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// Detecting language items.
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//
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// Language items are items that represent concepts intrinsic to the language
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// itself. Examples are:
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//
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// * Traits that specify "kinds"; e.g. "const", "copy", "owned".
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//
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// * Traits that represent operators; e.g. "add", "sub", "index".
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//
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// * Functions called by the compiler itself.
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use driver::session::Session;
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use metadata::csearch::each_lang_item;
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use metadata::cstore::iter_crate_data;
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use syntax::ast::{crate, def_id, lit_str, meta_item};
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use syntax::ast::{meta_list, meta_name_value, meta_word};
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use syntax::ast_util::local_def;
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use syntax::visit::{default_simple_visitor, mk_simple_visitor, SimpleVisitor};
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use syntax::visit::visit_crate;
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use core::cast::transmute;
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use core::hashmap::HashMap;
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pub enum LangItem {
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ConstTraitLangItem, // 0
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CopyTraitLangItem, // 1
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OwnedTraitLangItem, // 2
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DurableTraitLangItem, // 3
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DropTraitLangItem, // 4
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AddTraitLangItem, // 5
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SubTraitLangItem, // 6
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MulTraitLangItem, // 7
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DivTraitLangItem, // 8
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RemTraitLangItem, // 9
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NegTraitLangItem, // 10
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NotTraitLangItem, // 11
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BitXorTraitLangItem, // 12
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BitAndTraitLangItem, // 13
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BitOrTraitLangItem, // 14
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ShlTraitLangItem, // 15
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ShrTraitLangItem, // 16
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IndexTraitLangItem, // 17
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EqTraitLangItem, // 18
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OrdTraitLangItem, // 19
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StrEqFnLangItem, // 20
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UniqStrEqFnLangItem, // 21
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AnnihilateFnLangItem, // 22
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LogTypeFnLangItem, // 23
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FailFnLangItem, // 24
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FailBoundsCheckFnLangItem, // 25
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ExchangeMallocFnLangItem, // 26
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ExchangeFreeFnLangItem, // 27
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MallocFnLangItem, // 28
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FreeFnLangItem, // 29
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BorrowAsImmFnLangItem, // 30
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ReturnToMutFnLangItem, // 31
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CheckNotBorrowedFnLangItem, // 32
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StrDupUniqFnLangItem, // 33
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StartFnLangItem, // 34
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}
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pub struct LanguageItems {
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items: [Option<def_id>, ..35]
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}
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pub impl LanguageItems {
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pub fn new() -> LanguageItems {
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LanguageItems {
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items: [ None, ..35 ]
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}
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}
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fn each_item(&self, f: &fn(def_id: def_id, i: uint) -> bool) {
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for self.items.eachi |i, &item| {
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if !f(item.get(), i) {
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break;
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}
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}
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}
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pub fn item_name(index: uint) -> &'static str {
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match index {
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0 => "const",
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1 => "copy",
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2 => "owned",
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3 => "durable",
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4 => "drop",
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5 => "add",
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6 => "sub",
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7 => "mul",
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8 => "div",
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9 => "rem",
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10 => "neg",
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11 => "not",
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12 => "bitxor",
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13 => "bitand",
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14 => "bitor",
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15 => "shl",
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16 => "shr",
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17 => "index",
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18 => "eq",
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19 => "ord",
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20 => "str_eq",
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21 => "uniq_str_eq",
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22 => "annihilate",
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23 => "log_type",
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24 => "fail_",
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25 => "fail_bounds_check",
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26 => "exchange_malloc",
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27 => "exchange_free",
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28 => "malloc",
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29 => "free",
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30 => "borrow_as_imm",
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31 => "return_to_mut",
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32 => "check_not_borrowed",
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33 => "strdup_uniq",
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34 => "start",
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_ => "???"
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}
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}
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// FIXME #4621: Method macros sure would be nice here.
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pub fn const_trait(&const self) -> def_id {
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self.items[ConstTraitLangItem as uint].get()
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}
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pub fn copy_trait(&const self) -> def_id {
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self.items[CopyTraitLangItem as uint].get()
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}
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pub fn owned_trait(&const self) -> def_id {
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self.items[OwnedTraitLangItem as uint].get()
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}
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pub fn durable_trait(&const self) -> def_id {
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self.items[DurableTraitLangItem as uint].get()
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}
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pub fn drop_trait(&const self) -> def_id {
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self.items[DropTraitLangItem as uint].get()
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}
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pub fn add_trait(&const self) -> def_id {
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self.items[AddTraitLangItem as uint].get()
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}
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pub fn sub_trait(&const self) -> def_id {
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self.items[SubTraitLangItem as uint].get()
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}
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pub fn mul_trait(&const self) -> def_id {
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self.items[MulTraitLangItem as uint].get()
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}
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pub fn div_trait(&const self) -> def_id {
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self.items[DivTraitLangItem as uint].get()
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}
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pub fn rem_trait(&const self) -> def_id {
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self.items[RemTraitLangItem as uint].get()
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}
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pub fn neg_trait(&const self) -> def_id {
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self.items[NegTraitLangItem as uint].get()
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}
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pub fn not_trait(&const self) -> def_id {
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self.items[NotTraitLangItem as uint].get()
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}
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pub fn bitxor_trait(&const self) -> def_id {
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self.items[BitXorTraitLangItem as uint].get()
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}
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pub fn bitand_trait(&const self) -> def_id {
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self.items[BitAndTraitLangItem as uint].get()
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}
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pub fn bitor_trait(&const self) -> def_id {
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self.items[BitOrTraitLangItem as uint].get()
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}
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pub fn shl_trait(&const self) -> def_id {
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self.items[ShlTraitLangItem as uint].get()
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}
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pub fn shr_trait(&const self) -> def_id {
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self.items[ShrTraitLangItem as uint].get()
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}
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pub fn index_trait(&const self) -> def_id {
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self.items[IndexTraitLangItem as uint].get()
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}
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pub fn eq_trait(&const self) -> def_id {
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self.items[EqTraitLangItem as uint].get()
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}
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pub fn ord_trait(&const self) -> def_id {
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self.items[OrdTraitLangItem as uint].get()
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}
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pub fn str_eq_fn(&const self) -> def_id {
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self.items[StrEqFnLangItem as uint].get()
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}
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pub fn uniq_str_eq_fn(&const self) -> def_id {
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self.items[UniqStrEqFnLangItem as uint].get()
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}
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pub fn annihilate_fn(&const self) -> def_id {
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self.items[AnnihilateFnLangItem as uint].get()
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}
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pub fn log_type_fn(&const self) -> def_id {
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self.items[LogTypeFnLangItem as uint].get()
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}
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pub fn fail_fn(&const self) -> def_id {
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self.items[FailFnLangItem as uint].get()
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}
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pub fn fail_bounds_check_fn(&const self) -> def_id {
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self.items[FailBoundsCheckFnLangItem as uint].get()
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}
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pub fn exchange_malloc_fn(&const self) -> def_id {
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self.items[ExchangeMallocFnLangItem as uint].get()
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}
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pub fn exchange_free_fn(&const self) -> def_id {
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self.items[ExchangeFreeFnLangItem as uint].get()
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}
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pub fn malloc_fn(&const self) -> def_id {
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self.items[MallocFnLangItem as uint].get()
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}
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pub fn free_fn(&const self) -> def_id {
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self.items[FreeFnLangItem as uint].get()
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}
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pub fn borrow_as_imm_fn(&const self) -> def_id {
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self.items[BorrowAsImmFnLangItem as uint].get()
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}
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pub fn return_to_mut_fn(&const self) -> def_id {
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self.items[ReturnToMutFnLangItem as uint].get()
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}
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pub fn check_not_borrowed_fn(&const self) -> def_id {
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self.items[CheckNotBorrowedFnLangItem as uint].get()
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}
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pub fn strdup_uniq_fn(&const self) -> def_id {
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self.items[StrDupUniqFnLangItem as uint].get()
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}
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pub fn start_fn(&const self) -> def_id {
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self.items[StartFnLangItem as uint].get()
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}
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}
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fn LanguageItemCollector<'r>(crate: @crate,
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session: Session,
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items: &'r mut LanguageItems)
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-> LanguageItemCollector<'r> {
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let mut item_refs = HashMap::new();
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item_refs.insert(@~"const", ConstTraitLangItem as uint);
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item_refs.insert(@~"copy", CopyTraitLangItem as uint);
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item_refs.insert(@~"owned", OwnedTraitLangItem as uint);
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item_refs.insert(@~"durable", DurableTraitLangItem as uint);
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item_refs.insert(@~"drop", DropTraitLangItem as uint);
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item_refs.insert(@~"add", AddTraitLangItem as uint);
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item_refs.insert(@~"sub", SubTraitLangItem as uint);
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item_refs.insert(@~"mul", MulTraitLangItem as uint);
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item_refs.insert(@~"div", DivTraitLangItem as uint);
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item_refs.insert(@~"rem", RemTraitLangItem as uint);
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item_refs.insert(@~"neg", NegTraitLangItem as uint);
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item_refs.insert(@~"not", NotTraitLangItem as uint);
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item_refs.insert(@~"bitxor", BitXorTraitLangItem as uint);
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item_refs.insert(@~"bitand", BitAndTraitLangItem as uint);
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item_refs.insert(@~"bitor", BitOrTraitLangItem as uint);
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item_refs.insert(@~"shl", ShlTraitLangItem as uint);
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item_refs.insert(@~"shr", ShrTraitLangItem as uint);
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item_refs.insert(@~"index", IndexTraitLangItem as uint);
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item_refs.insert(@~"eq", EqTraitLangItem as uint);
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item_refs.insert(@~"ord", OrdTraitLangItem as uint);
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item_refs.insert(@~"str_eq", StrEqFnLangItem as uint);
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item_refs.insert(@~"uniq_str_eq", UniqStrEqFnLangItem as uint);
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item_refs.insert(@~"annihilate", AnnihilateFnLangItem as uint);
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item_refs.insert(@~"log_type", LogTypeFnLangItem as uint);
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item_refs.insert(@~"fail_", FailFnLangItem as uint);
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item_refs.insert(@~"fail_bounds_check",
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FailBoundsCheckFnLangItem as uint);
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item_refs.insert(@~"exchange_malloc", ExchangeMallocFnLangItem as uint);
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item_refs.insert(@~"exchange_free", ExchangeFreeFnLangItem as uint);
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item_refs.insert(@~"malloc", MallocFnLangItem as uint);
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item_refs.insert(@~"free", FreeFnLangItem as uint);
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item_refs.insert(@~"borrow_as_imm", BorrowAsImmFnLangItem as uint);
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item_refs.insert(@~"return_to_mut", ReturnToMutFnLangItem as uint);
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item_refs.insert(@~"check_not_borrowed",
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CheckNotBorrowedFnLangItem as uint);
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item_refs.insert(@~"strdup_uniq", StrDupUniqFnLangItem as uint);
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item_refs.insert(@~"start", StartFnLangItem as uint);
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LanguageItemCollector {
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crate: crate,
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session: session,
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items: items,
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item_refs: item_refs
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}
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}
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struct LanguageItemCollector<'self> {
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items: &'self mut LanguageItems,
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crate: @crate,
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session: Session,
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item_refs: HashMap<@~str, uint>,
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}
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pub impl<'self> LanguageItemCollector<'self> {
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fn match_and_collect_meta_item(&self, item_def_id: def_id,
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meta_item: @meta_item) {
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match meta_item.node {
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meta_name_value(key, literal) => {
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match literal.node {
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lit_str(value) => {
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self.match_and_collect_item(item_def_id, key, value);
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}
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_ => {} // Skip.
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}
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}
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meta_word(*) | meta_list(*) => {} // Skip.
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}
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}
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fn collect_item(&self, item_index: uint, item_def_id: def_id) {
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// Check for duplicates.
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match self.items.items[item_index] {
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Some(original_def_id) if original_def_id != item_def_id => {
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self.session.err(fmt!("duplicate entry for `%s`",
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LanguageItems::item_name(item_index)));
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}
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Some(_) | None => {
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// OK.
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}
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}
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// Matched.
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self.items.items[item_index] = Some(item_def_id);
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}
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fn match_and_collect_item(&self,
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item_def_id: def_id, key: @~str, value: @~str) {
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if *key != ~"lang" {
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return; // Didn't match.
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}
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match self.item_refs.find(&value) {
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None => {
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// Didn't match.
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}
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Some(&item_index) => {
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self.collect_item(item_index, item_def_id)
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}
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}
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}
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fn collect_local_language_items(&self) {
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unsafe {
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let this: *LanguageItemCollector<'self> = transmute(self);
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visit_crate(self.crate, (), mk_simple_visitor(@SimpleVisitor {
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visit_item: |item| {
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for item.attrs.each |attribute| {
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unsafe {
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(*this).match_and_collect_meta_item(
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local_def(item.id),
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attribute.node.value
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);
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}
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}
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},
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.. *default_simple_visitor()
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}));
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}
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}
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fn collect_external_language_items(&self) {
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let crate_store = self.session.cstore;
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do iter_crate_data(crate_store) |crate_number, _crate_metadata| {
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for each_lang_item(crate_store, crate_number)
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|node_id, item_index| {
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let def_id = def_id { crate: crate_number, node: node_id };
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self.collect_item(item_index, def_id);
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}
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}
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}
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fn check_completeness(&self) {
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for self.item_refs.each |&key, &item_ref| {
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match self.items.items[item_ref] {
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None => {
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self.session.err(fmt!("no item found for `%s`", *key));
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}
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Some(_) => {
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// OK.
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}
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}
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}
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}
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fn collect(&self) {
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self.collect_local_language_items();
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self.collect_external_language_items();
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self.check_completeness();
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}
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}
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pub fn collect_language_items(crate: @crate,
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session: Session)
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-> LanguageItems {
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let mut items = LanguageItems::new();
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let collector = LanguageItemCollector(crate, session, &mut items);
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collector.collect();
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copy items
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}
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