teeconfig 0.1.0

A teeworlds/ddnet config parser.
Documentation 
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use crate::tokens_cpp::{
    Token,
    LexicalError,
};
use crate::{
    ConfigEntry,
    EntryType,
    CFGFlags,
};

grammar;

extern {
    type Location = usize;
    type Error = LexicalError;

    enum Token {
        "config int" => Token::MacroConfigInt,
        "config str" => Token::MacroConfigStr,
        "config col" => Token::MacroConfigColor,

        "flag save" => Token::FlagSave,
        "flag client" => Token::FlagClient,
        "flag server" => Token::FlagServer,
        "flag insens" => Token::FlagInsensitive,
        "flag teehist" => Token::FlagNonTeehistoric,
        "flag master" => Token::FlagMaster,
        "flag econ" => Token::FlagEcon,
        "flag game" => Token::FlagGame,
        "flag colalpha" => Token::FlagColAlpha,
        "flag collight" => Token::FlagColLight,

        "string lit" => Token::StringLiteral(<String>),
        "ident" => Token::Identifier(<String>),
        "int" => Token::Integer(<i64>),
        "(" => Token::LParen,
        ")" => Token::RParen,
        "," => Token::Comma,
        "|" => Token::Pipe,
        ";" => Token::Semicolon,
        "MaxClients" => Token::MaxClients,
        "ServerInfoLevelMin" => Token::ServerInfoLevelMin,
        "ServerInfoLevelMax" => Token::ServerInfoLevelMax,
    }
}

pub Configs: Vec<ConfigEntry> = {
    <entries:Entry*> => entries
}

Flag: CFGFlags = {
    "flag save" => CFGFlags::SAVE,
    "flag client" => CFGFlags::CLIENT,
    "flag server" => CFGFlags::SERVER,
    "flag insens" => CFGFlags::INSENSITIVE,
    "flag teehist" => CFGFlags::NON_TEEHISTORIC,
    "flag master" => CFGFlags::MASTER,
    "flag econ" => CFGFlags::ECON,
    "flag game" => CFGFlags::GAME,
    "flag colalpha" => CFGFlags::COLALPHA,
    "flag collight" => CFGFlags::COLLIGHT,
}

Flags: CFGFlags = {
    <f:(<Flag> "|")*> <e:Flag?> => match e {
        None => {
            let mut base = CFGFlags::empty();
            base.extend(f.into_iter());
            base
        }
        Some(e) => {
            let mut base = e;
            base.extend(f.into_iter());
            base
        }
    }
}

Int: i64 = {
    <x:"int"> => x,
    "MaxClients" => 64,
    "ServerInfoLevelMin" => 0,
    "ServerInfoLevelMax" => 2,
}

Entry: ConfigEntry = {
    "config int" "(" <sym:"ident"> "," <name:"ident"> ","
        <def:Int> "," <min:Int> "," <max:Int> ","
        <flags:Flags> "," <desc:"string lit"> ")" ";"? => {

            ConfigEntry {
                description: desc,
                flags,
                name,
                symbol: sym,
                entry_type: EntryType::Int {
                    max,
                    min,
                    default: def,
                    value: None,
                }
            }
        },
    "config str" "(" <sym:"ident"> "," <name:"ident"> ","
        <max_length:Int> "," <default:"string lit"> ","
        <flags:Flags> "," <desc:"string lit"> ")" ";"? => {

            ConfigEntry {
                description: desc,
                flags,
                name,
                symbol: sym,
                entry_type: EntryType::Str {
                    max_length: max_length as usize,
                    default,
                    value: None,
                }
            }
        },
    "config col" "(" <sym:"ident"> "," <name:"ident"> ","
        <default:Int> ","
        <flags:Flags> "," <desc:"string lit"> ")" ";"? => {
            ConfigEntry {
                description: desc,
                flags,
                name,
                symbol: sym,
                entry_type: EntryType::Color {
                    default,
                    value: None,
                }
            }
        }
}