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/**
* @license
* Copyright (C) 2015 Chris Morgan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview
* Registers a language handler for Rust.
*
* Derived from prior experience implementing similar things in a few environments,
* most especially rust.vim.
*
* @author me@chrismorgan.info
*/
PR['registerLangHandler'](
PR['createSimpleLexer']([], [
// Whitespace
[PR['PR_PLAIN'], /^[\t\n\r \xA0]+/],
// Single line comments
[PR['PR_COMMENT'], /^\/\/.*/],
// Block comments (sadly I do not see how to make this cope with comment nesting as it should)
[PR['PR_COMMENT'], /^\/\*[\s\S]*?(?:\*\/|$)/],//, null],
// String and character literals
[PR['PR_STRING'], /^b"(?:[^\\]|\\(?:.|x[\da-fA-F]{2}))*?"/], // Bytes literal
[PR['PR_STRING'], /^"(?:[^\\]|\\(?:.|x[\da-fA-F]{2}|u\{\[\da-fA-F]{1,6}\}))*?"/], // String literal
[PR['PR_STRING'], /^b?r(#*)\"[\s\S]*?\"\1/], // Raw string/bytes literal
[PR['PR_STRING'], /^b'([^\\]|\\(.|x[\da-fA-F]{2}))'/], // Byte literal
[PR['PR_STRING'], /^'([^\\]|\\(.|x[\da-fA-F]{2}|u\{[\da-fA-F]{1,6}\}))'/], // Character literal
// Lifetime
[PR['PR_TAG'], /^'\w+?\b/],
// Keywords, reserved keywords and primitive types
[PR['PR_KEYWORD'], /^(?:match|if|else|as|break|box|continue|extern|fn|for|in|if|impl|let|loop|pub|return|super|unsafe|where|while|use|mod|trait|struct|enum|type|move|mut|ref|static|const|crate)\b/],
[PR['PR_KEYWORD'], /^(?:alignof|become|do|offsetof|priv|pure|sizeof|typeof|unsized|yield|abstract|virtual|final|override|macro)\b/],
[PR['PR_TYPE'], /^(?:[iu](8|16|32|64|size)|char|bool|f32|f64|str|Self)\b/],
// Rust 1.0 prelude items
[PR['PR_TYPE'], /^(?:Copy|Send|Sized|Sync|Drop|Fn|FnMut|FnOnce|Box|ToOwned|Clone|PartialEq|PartialOrd|Eq|Ord|AsRef|AsMut|Into|From|Default|Iterator|Extend|IntoIterator|DoubleEndedIterator|ExactSizeIterator|Option|Some|None|Result|Ok|Err|SliceConcatExt|String|ToString|Vec)\b/],
// Literals:
[PR['PR_LITERAL'], /^(self|true|false|null)\b/],
// A number is a hex integer literal, a decimal real literal, or in
// scientific notation.
// Integer literals: decimal, hexadecimal, octal, binary.
[PR['PR_LITERAL'], /^\d[0-9_]*(?:[iu](?:size|8|16|32|64))?/],
[PR['PR_LITERAL'], /^0x[a-fA-F0-9_]+(?:[iu](?:size|8|16|32|64))?/],
[PR['PR_LITERAL'], /^0o[0-7_]+(?:[iu](?:size|8|16|32|64))?/],
[PR['PR_LITERAL'], /^0b[01_]+(?:[iu](?:size|8|16|32|64))?/],
// Float literals
[PR['PR_LITERAL'], /^\d[0-9_]*\.(?![^\s\d.])/],
[PR['PR_LITERAL'], /^\d[0-9_]*(?:\.\d[0-9_]*)(?:[eE][+-]?[0-9_]+)?(?:f32|f64)?/],
[PR['PR_LITERAL'], /^\d[0-9_]*(?:\.\d[0-9_]*)?(?:[eE][+-]?[0-9_]+)(?:f32|f64)?/],
[PR['PR_LITERAL'], /^\d[0-9_]*(?:\.\d[0-9_]*)?(?:[eE][+-]?[0-9_]+)?(?:f32|f64)/],
// Macro invocations (an identifier plus a !)
[PR['PR_ATTRIB_NAME'], /^[a-z_]\w*!/i],
// An identifier (sorry, this should be unicode)
[PR['PR_PLAIN'], /^[a-z_]\w*/i],
// Attributes
[PR['PR_ATTRIB_VALUE'], /^#!?\[[\s\S]*?\]/],
// All the punctuation
[PR['PR_PUNCTUATION'], /^[+\-/*=^&|!<>%[\](){}?:.,;]/],
// Anything else (which is probably illegal, as all the legal stuff should have been covered) can be plain
[PR['PR_PLAIN'], /./]
]),
['rust']);