pub const SINGLE_LINE_COMMENT : &'static str = "--";
pub const LIBRARY : &'static str = "library";
pub const USE : &'static str = "use";
pub const ALL : &'static str = "all";
pub const ENTITY : &'static str = "entity";
pub const IS : &'static str = "is";
pub const BEGIN : &'static str = "begin";
pub const END : &'static str = "end";
pub const GENERIC : &'static str = "generic";
pub const PORT : &'static str = "port";
pub const IN : &'static str = "in";
pub const OUT : &'static str = "out";
pub const INOUT : &'static str = "inout";
pub const BUFFER : &'static str = "buffer";
pub const ARCHITECTURE : &'static str = "architecture";
pub const OF : &'static str = "of";
pub const CONSTANT : &'static str = "constant";
pub const SIGNAL : &'static str = "signal";
pub const PROCESS : &'static str = "process";
pub const VARIABLE : &'static str = "variable";
pub const MAP : &'static str = "map";