1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

use crate::config::ConfigOption;
use crate::linter::{SyntaxRule, SyntaxRuleResult};
use sv_parser::{NodeEvent, RefNode, StatementItem, StatementOrNull, SyntaxTree};

#[derive(Default)]
pub struct MultilineForBegin;

impl SyntaxRule for MultilineForBegin {
    fn check(
        &mut self,
        syntax_tree: &SyntaxTree,
        event: &NodeEvent,
        _option: &ConfigOption,
    ) -> SyntaxRuleResult {
        let node = match event {
            NodeEvent::Enter(x) => x,
            NodeEvent::Leave(_) => {
                return SyntaxRuleResult::Pass;
            }
        };
        match node {
            RefNode::LoopStatementFor(x) => {
                let (_, _, ref a) = x.nodes;

                let mut for_str = String::from("");
                syntax_tree.get_str_trim(*x).map(|x| for_str.push_str(x));

                if let StatementOrNull::Statement(x) = a {
                    let (_, _, ref x) = x.nodes;
                    match x {
                        StatementItem::SeqBlock(_) => (),
                        _ => {
                            if for_str.contains('\n') {
                                return SyntaxRuleResult::Fail;
                            }
                        }
                    }
                }

                SyntaxRuleResult::Pass
            }
            _ => SyntaxRuleResult::Pass,
        }
    }

    fn name(&self) -> String {
        String::from("multiline_for_begin")
    }

    fn hint(&self, _option: &ConfigOption) -> String {
        String::from("Add `begin`/`end` around multi-line `for` statement.")
    }

    fn reason(&self) -> String {
        String::from("Without `begin`/`end`, the loop statement may be confusing.")
    }
}