tagua_parser/rules/
mod.rs

1// Tagua VM
2//
3//
4// New BSD License
5//
6// Copyright © 2016-2016, Ivan Enderlin.
7// All rights reserved.
8//
9// Redistribution and use in source and binary forms, with or without
10// modification, are permitted provided that the following conditions are met:
11//     * Redistributions of source code must retain the above copyright
12//       notice, this list of conditions and the following disclaimer.
13//     * Redistributions in binary form must reproduce the above copyright
14//       notice, this list of conditions and the following disclaimer in the
15//       documentation and/or other materials provided with the distribution.
16//     * Neither the name of the Hoa nor the names of its contributors may be
17//       used to endorse or promote products derived from this software without
18//       specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
24// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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27// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30// POSSIBILITY OF SUCH DAMAGE.
31
32//! The grammar as a set of rules.
33//!
34//! The grammar is splitted into group of rules for the sake of clarity.
35
36pub mod comments;
37pub mod expressions;
38pub mod literals;
39pub mod skip;
40pub mod tokens;
41pub mod whitespaces;
42
43use super::ast;
44use super::internal::*;
45
46pub fn root(input: &[u8]) -> ast::Addition {
47    match expressions::expr(input) {
48        Result::Done(_, ast) => ast,
49        _ => panic!("Youhouuu")
50    }
51}
52
53
54#[cfg(test)]
55mod tests {
56    use super::root;
57    use super::super::ast;
58
59    #[test]
60    fn case_expr() {
61        assert_eq!(
62            root(b"1+2"),
63            ast::Addition {
64                a: ast::Term {
65                    t: ast::Literal::Integer(1i64)
66                },
67                b: ast::Term {
68                    t: ast::Literal::Integer(2i64)
69                }
70            }
71        );
72    }
73
74    #[test]
75    #[should_panic(expected = "Youhouuu")]
76    fn case_expr_panic() {
77        root(b"panic!");
78    }
79}
tagua_parser/rules/mod.rs

tagua_parser/rules/
mod.rs
