    // Comment
    /* Comment
    	*/

    // Identifiers
    hellóñαωΑΩµo!();
    HellóñαωΑΩµ::Hello;
    'hellóñαωΑΩµo

    pub use self::PathParameters::*;
    pub use symbol::{Ident, Symbol as Name};
    use serialize::{self, Encoder, Decoder};
    use std::u32;

    #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]

    pub struct Lifetime {
    	pub id: NodeId,
    	pub span: Span,
    	pub bounds: Vec<PathSegment>
    }

    impl fmt::Debug for Lifetime {
    	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    		write!(f, "lifetime({}: {})", self.id, pprust::lifetime_to_string(self))
    	}
    }
    impl<'a> PartialEq<&'a str> for Path {
    	fn eq(&self, string: &&'a str) -> bool {
    		self.segments.len() == 1 && self.segments[0].identifier.name == *string
    	}
    }

    enum TraitBoundModifier {
    	None,
    	Maybe,
    }

    union tests {
    	a: i128,
    	b: isize,
    }

    #[valid types]
    fn types() {
    	let num = 333_3_;
    	let num_u8: u8 = 333u8;
    	let num_u16: u16 = 333u16;
    	let num_u32: u32 = 333u32;
    	let num_u64: u64 = 333u64;
    	let num_u128: u128 = 333u128;
    	let num_usize: usize = 333usize;
    	let num_float: f32 = 333.45f32;

    	let binary = 0b1_010;
    	let invalid_binary= 0b1_015;

    	let octal = 0o21535;
    	let invalid_octal = 0o64_92;

    	let hexadecimal = 0x73A2_F;
    	let invalid_hexadecimal = 0x7_3AY;

    	let char1: char = 'a';
    	let char2: char = '\n';
    	let char3: char = '\u{123_AF}';
    	let invalid_char1: char = '\y';
    	let invalid_char2: char = '\324';
    	let invalid_char3: char = '%%';
    	let invalid_char4: char = '\n\dfd';
    	let invalid_char5: char = 'aaaaa';
    	let open_char: char = '&&&;

    	let byte1: u8 = b'a';
    	let byte2: u8 = b'\x13';
    	let invalid_byte1: u8 = b'ab';
    	let invalid_byte2: u8 = b'\b';
    	let invalid_byte2: u8 = b'\u{123}';

    	let string: str = "hello \n \r \u{123_________fd_} \
    						bye";
    	let invalid_string: str = "hello \b \u{_123} \u{1234567} \  bye";
    	let byte_string: str = b"hello \t \0 \u{123} \b bye";
    	let raw_string1: str = r"hello \t \b";
    	let raw_string2: str = r####"hello \n "### bye"########;
    	let raw_string3: str = br####"hello \n"####;
    }