use crate::config::ConfigOption;
use crate::linter::{SyntaxRule, SyntaxRuleResult};
use sv_parser::{AlwaysKeyword, NodeEvent, RefNode, SyntaxTree};
#[derive(Default)]
pub struct KeywordForbiddenAlwaysLatch;
impl SyntaxRule for KeywordForbiddenAlwaysLatch {
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::AlwaysKeyword(AlwaysKeyword::AlwaysLatch(_)) => SyntaxRuleResult::Fail,
_ => SyntaxRuleResult::Pass,
}
}
fn name(&self) -> String {
String::from("keyword_forbidden_always_latch")
}
fn hint(&self, _option: &ConfigOption) -> String {
String::from("Use `always @*` or `always @(en)` instead of `always_latch`.")
}
fn reason(&self) -> String {
String::from("Only SystemVerilog, not Verilog, has `always_latch`.")
}
}