shaderc/src/parser/tests.rs

use crate::parser::{Ast, Localised, Token, parse, tokenize};

#[test]
fn test_tokenize() {
    let input = "(+ (* 1:u8 2) 2)";
    let expected = vec![
        Localised::dummy_location(Token::LeftParen),
        Localised::dummy_location(Token::Symbol("+".to_string())),
        Localised::dummy_location(Token::LeftParen),
        Localised::dummy_location(Token::Symbol("*".to_string())),
        Localised::dummy_location(Token::Symbol("1:u8".to_string())),
        Localised::dummy_location(Token::Symbol("2".to_string())),
        Localised::dummy_location(Token::RightParen),
        Localised::dummy_location(Token::Symbol("2".to_string())),
        Localised::dummy_location(Token::RightParen),
    ];
    assert_eq!(tokenize(input), expected);
}

#[test]
#[should_panic]
fn test_unexpected_pclose() {
    let input = "())";
    let tokens = tokenize(input);
    let _ast = parse(tokens).unwrap();
}

#[test]
#[should_panic]
fn test_unexpected_eof() {
    let input = "(1 2 3 4";
    let tokens = tokenize(input);
    let _ast = parse(tokens).unwrap();
}

#[test]
fn test_parse() {
    let src = "
(module Shader Logical GLSL450)
(import :std GLSL.std.450)
(bind (frag-coord:*v4f32i) (BuiltIn FragCoord))
(bind (out-color:*v4f32o) (Location 0))
(dec frag-coord:*v4f32i Input)
(dec out-color:*v4f32o Output)
(entry main Fragment OriginUpperLeft (:frag-coord :out-color))
(fun (main)
  (store-ptr (out-color)
    (v4f32i (/ (.xy (load-ptr frag-coord))
               (v2f32 1920.0 1080.0)) 
            1.0 
            1.0)))
";
    let ast = parse(tokenize(src)).unwrap();
    println!("{:?}", ast);
    let test_ast: Ast = Ast::Root(vec![
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("module".to_string())),
            Ast::Symbol(Localised::dummy_location("Shader".to_string())),
            Ast::Symbol(Localised::dummy_location("Logical".to_string())),
            Ast::Symbol(Localised::dummy_location("GLSL450".to_string())),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("import".to_string())),
            Ast::Symbol(Localised::dummy_location(":std".to_string())),
            Ast::Symbol(Localised::dummy_location("GLSL.std.450".to_string())),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("bind".to_string())),
            Ast::List(Localised::dummy_location(vec![Ast::Symbol(
                Localised::dummy_location("frag-coord:*v4f32i".to_string()),
            )])),
            Ast::List(Localised::dummy_location(vec![
                Ast::Symbol(Localised::dummy_location("Builtin".to_string())),
                Ast::Symbol(Localised::dummy_location("FragCoord".to_string())),
            ])),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("bind".to_string())),
            Ast::List(Localised::dummy_location(vec![Ast::Symbol(
                Localised::dummy_location("out-color:*v4f32o".to_string()),
            )])),
            Ast::List(Localised::dummy_location(vec![
                Ast::Symbol(Localised::dummy_location("Location".to_string())),
                Ast::Symbol(Localised::dummy_location("0".to_string())),
            ])),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("dec".to_string())),
            Ast::Symbol(Localised::dummy_location("frag-coord:*v4f32i".to_string())),
            Ast::Symbol(Localised::dummy_location("Input".to_string())),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("dec".to_string())),
            Ast::Symbol(Localised::dummy_location("out-color:*v4f32o".to_string())),
            Ast::Symbol(Localised::dummy_location("Output".to_string())),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("entry".to_string())),
            Ast::Symbol(Localised::dummy_location("main".to_string())),
            Ast::Symbol(Localised::dummy_location("Fragment".to_string())),
            Ast::Symbol(Localised::dummy_location("OriginUpperLeft".to_string())),
            Ast::List(Localised::dummy_location(vec![
                Ast::Symbol(Localised::dummy_location(":frag-coord".to_string())),
                Ast::Symbol(Localised::dummy_location(":out-color".to_string())),
            ])),
        ])),
        Ast::List(Localised::dummy_location(vec![
            Ast::Symbol(Localised::dummy_location("fun".to_string())),
            Ast::List(Localised::dummy_location(vec![Ast::Symbol(
                Localised::dummy_location("main".to_string()),
            )])),
            Ast::List(Localised::dummy_location(vec![
                Ast::Symbol(Localised::dummy_location("store-ptr".to_string())),
                Ast::List(Localised::dummy_location(vec![Ast::Symbol(
                    Localised::dummy_location("out-color".to_string()),
                )])),
                Ast::List(Localised::dummy_location(vec![
                    Ast::Symbol(Localised::dummy_location("v4f23i".to_string())),
                    Ast::List(Localised::dummy_location(vec![
                        Ast::Symbol(Localised::dummy_location("/".to_string())),
                        Ast::List(Localised::dummy_location(vec![
                            Ast::Symbol(Localised::dummy_location(".xy".to_string())),
                            Ast::List(Localised::dummy_location(vec![
                                Ast::Symbol(Localised::dummy_location("load-ptr".to_string())),
                                Ast::Symbol(Localised::dummy_location("frag-coord".to_string())),
                            ])),
                        ])),
                        Ast::List(Localised::dummy_location(vec![
                            Ast::Symbol(Localised::dummy_location("v2f32".to_string())),
                            Ast::Symbol(Localised::dummy_location("1920.0".to_string())),
                            Ast::Symbol(Localised::dummy_location("1080.0".to_string())),
                        ])),
                    ])),
                    Ast::Symbol(Localised::dummy_location("1.0".to_string())),
                    Ast::Symbol(Localised::dummy_location("1.0".to_string())),
                ])),
            ])),
        ])),
    ]);
    assert_eq!(ast, test_ast);
}