From 50a02eb3593591a02677e1b56f24d7ff0459b9d0 Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Wed, 12 Aug 2020 17:06:49 +0200 Subject: Rename ra_parser -> parser --- crates/ra_parser/src/grammar/items/use_item.rs | 132 ------------------------- 1 file changed, 132 deletions(-) delete mode 100644 crates/ra_parser/src/grammar/items/use_item.rs (limited to 'crates/ra_parser/src/grammar/items/use_item.rs') diff --git a/crates/ra_parser/src/grammar/items/use_item.rs b/crates/ra_parser/src/grammar/items/use_item.rs deleted file mode 100644 index 8e836a77e..000000000 --- a/crates/ra_parser/src/grammar/items/use_item.rs +++ /dev/null @@ -1,132 +0,0 @@ -//! FIXME: write short doc here - -use super::*; - -pub(super) fn use_item(p: &mut Parser, m: Marker) { - assert!(p.at(T![use])); - p.bump(T![use]); - use_tree(p, true); - p.expect(T![;]); - m.complete(p, USE); -} - -/// Parse a use 'tree', such as `some::path` in `use some::path;` -/// Note that this is called both by `use_item` and `use_tree_list`, -/// so handles both `some::path::{inner::path}` and `inner::path` in -/// `use some::path::{inner::path};` -fn use_tree(p: &mut Parser, top_level: bool) { - let m = p.start(); - match p.current() { - // Finish the use_tree for cases of e.g. - // `use some::path::{self, *};` or `use *;` - // This does not handle cases such as `use some::path::*` - // N.B. in Rust 2015 `use *;` imports all from crate root - // however in Rust 2018 `use *;` errors: ('cannot glob-import all possible crates') - // FIXME: Add this error (if not out of scope) - - // test use_star - // use *; - // use ::*; - // use some::path::{*}; - // use some::path::{::*}; - T![*] => p.bump(T![*]), - T![:] if p.at(T![::]) && p.nth(2) == T![*] => { - // Parse `use ::*;`, which imports all from the crate root in Rust 2015 - // This is invalid inside a use_tree_list, (e.g. `use some::path::{::*}`) - // but still parses and errors later: ('crate root in paths can only be used in start position') - // FIXME: Add this error (if not out of scope) - // In Rust 2018, it is always invalid (see above) - p.bump(T![::]); - p.bump(T![*]); - } - // Open a use tree list - // Handles cases such as `use {some::path};` or `{inner::path}` in - // `use some::path::{{inner::path}, other::path}` - - // test use_tree_list - // use {crate::path::from::root, or::path::from::crate_name}; // Rust 2018 (with a crate named `or`) - // use {path::from::root}; // Rust 2015 - // use ::{some::arbritrary::path}; // Rust 2015 - // use ::{{{root::export}}}; // Nonsensical but perfectly legal nesting - T!['{'] => { - use_tree_list(p); - } - T![:] if p.at(T![::]) && p.nth(2) == T!['{'] => { - p.bump(T![::]); - use_tree_list(p); - } - // Parse a 'standard' path. - // Also handles aliases (e.g. `use something as something_else`) - - // test use_path - // use ::crate_name; // Rust 2018 - All flavours - // use crate_name; // Rust 2018 - Anchored paths - // use item_in_scope_or_crate_name; // Rust 2018 - Uniform Paths - // - // use self::module::Item; - // use crate::Item; - // use self::some::Struct; - // use crate_name::some_item; - _ if paths::is_use_path_start(p) => { - paths::use_path(p); - match p.current() { - T![as] => { - // test use_alias - // use some::path as some_name; - // use some::{ - // other::path as some_other_name, - // different::path as different_name, - // yet::another::path, - // running::out::of::synonyms::for_::different::* - // }; - // use Trait as _; - opt_alias(p); - } - T![:] if p.at(T![::]) => { - p.bump(T![::]); - match p.current() { - T![*] => { - p.bump(T![*]); - } - // test use_tree_list_after_path - // use crate::{Item}; - // use self::{Item}; - T!['{'] => use_tree_list(p), - _ => { - // is this unreachable? - p.error("expected `{` or `*`"); - } - } - } - _ => (), - } - } - _ => { - m.abandon(p); - let msg = "expected one of `*`, `::`, `{`, `self`, `super` or an identifier"; - if top_level { - p.err_recover(msg, ITEM_RECOVERY_SET); - } else { - // if we are parsing a nested tree, we have to eat a token to - // main balanced `{}` - p.err_and_bump(msg); - } - return; - } - } - m.complete(p, USE_TREE); -} - -pub(crate) fn use_tree_list(p: &mut Parser) { - assert!(p.at(T!['{'])); - let m = p.start(); - p.bump(T!['{']); - while !p.at(EOF) && !p.at(T!['}']) { - use_tree(p, false); - if !p.at(T!['}']) { - p.expect(T![,]); - } - } - p.expect(T!['}']); - m.complete(p, USE_TREE_LIST); -} -- cgit v1.2.3