rust_syntax_proposal_01.md

The first stage would be to unify the struct and type keywords.

Current syntax

struct Name {
    first: ~str,
    last: ~str
}
 
struct Point(int, int);

struct Celcius(float);
struct Kelvin(float);
 
type Coordinate = Point; // alias

New syntax

type Name {
    first: ~str,
    last: ~str
}
 
type Point(int, int);

type Celcius(float);
type Kelvin(float);
 
type Coordinate = Point; // alias

Changing the syntax/keyword for enum would be more challenging.

rust_syntax_proposal_02.rs

type Name {
    first: ~str,
    last: ~str
}

type Shape { Circle(int) | Rect(int, int) }     // Variants with constructors
 
type Direction { North | South | East | West }	// without constructors
 
enum Flags {
    Optimise = 1,
    Debug = 2,
    Assemble = 4,
    Default { Optimise | Debug }    // Not sure about this??
}
 
type Point(int, int);

fn stream<T>() -> (Port<T>, Chan<T>);
 
type Coordinate = Point;            // alias or typedef

type Celcius(float);
type Kelvin(float);
 
fn celcius_to_kelvin(cel: Celcius) -> Kelvin {
    return Kelvin(*cel + 273.0);   // Construct Kelvin type from float
}
 
fn main() {
    let name = Name { first: ~"John", last: ~"Smith" };
    let shape = @Circle(20);
    let point = Point(10,20);
 
    let flags = Flags::Optimise;   // Use rustic namespace syntax
  
    let temp = Celcius(0);
    let temp = celcius_to_kelvin(temp);
}