lalrpop 0.12.2

convenient LR(1) parser generator
Documentation 
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use intern::intern;
use grammar::repr::NonterminalString;
use normalize::lower_helper;
use parser;
use session::Session;
use super::inline_order;

#[test]
fn test_inline_self_cycle() {
    let grammar = parser::parse_grammar(r#"
    grammar;
    extern { }
    #[inline] A: () = A;
"#).unwrap();
    let grammar = lower_helper(&Session::test(), grammar, true).unwrap();
    assert!(inline_order(&grammar).is_err());
}

#[test]
fn test_inline_cycle_3() {
    let grammar = parser::parse_grammar(r#"
    grammar;
    extern { }
    #[inline] A: () = B;
    #[inline] B: () = C;
    #[inline] C: () = A;
"#).unwrap();
    let grammar = lower_helper(&Session::test(), grammar, true).unwrap();
    assert!(inline_order(&grammar).is_err());
}

#[test]
fn test_inline_order() {
    // because C references A, we inline A first.
    let grammar = parser::parse_grammar(r#"
    grammar;
    extern { }
    #[inline] A: () = B;
    B: () = C;
    #[inline] C: () = A;
"#).unwrap();
    let grammar = lower_helper(&Session::test(), grammar, true).unwrap();
    let a = NonterminalString(intern("A"));
    let c = NonterminalString(intern("C"));
    assert_eq!(inline_order(&grammar).unwrap(), vec![a, c]);
}