// The MIT License (MIT)
//
// Copyright (c) 2024 Aliaksei Bialiauski
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
/// Program.
program = { license? ~ (me ~ NEWLINE ~ comment*) ~ (command ~ NEWLINE)* }
license = { comment* }
command = { comment* ~ CREATION ~ object }
object = { oid ~ WHITE_SPACE ~ (attributes ~ WHITE_SPACE)? ~ (new | application)? }
oid = { char+ }
attributes = { (ME ~ AT ~ char+) | char+ }
new = { ASSIGNMENT ~ WHITE_SPACE ~ reference}
application = { APPLICATION ~ WHITE_SPACE ~ reference }
reference = { char+ }
me = { ME ~ SEMICOLON ~ WHITE_SPACE ~ login }
login = { WHO ~ char+ }
char = { LOWERCASE_LETTER }
comment = { TAG ~ (!NEWLINE ~ ANY )* ~ NEWLINE? }
ASSIGNMENT = {">"}
CREATION = {"+"}
APPLICATION = {"->"}
WHO = {"@"}
ME = {"me"}
AT = {"/"}
SEMICOLON = {":"}
TAG = {"#"}