use crate::config::ConfigOption;
use crate::linter::{SyntaxRule, SyntaxRuleResult};
use sv_parser::{NodeEvent, RefNode, SyntaxTree};
#[derive(Default)]
pub struct ParameterDefaultValue {
under_parameter_port_list: bool,
}
impl SyntaxRule for ParameterDefaultValue {
fn check(
&mut self,
_syntax_tree: &SyntaxTree,
event: &NodeEvent,
_option: &ConfigOption,
) -> SyntaxRuleResult {
let node = match event {
NodeEvent::Enter(x) => {
match x {
RefNode::ParameterPortList(_) => {
self.under_parameter_port_list = true;
}
_ => ()
}
x
}
NodeEvent::Leave(x) => {
match x {
RefNode::ParameterPortList(_) => {
self.under_parameter_port_list = false;
}
_ => ()
}
return SyntaxRuleResult::Pass;
}
};
match (self.under_parameter_port_list, node) {
(true, RefNode::ParamAssignment(x)) => {
let (_, _, a) = &x.nodes;
if a.is_none() {
SyntaxRuleResult::Fail
} else {
SyntaxRuleResult::Pass
}
}
_ => SyntaxRuleResult::Pass,
}
}
fn name(&self) -> String {
String::from("parameter_default_value")
}
fn hint(&self, _option: &ConfigOption) -> String {
String::from("Specify `parameter` with an explicit default value.")
}
fn reason(&self) -> String {
String::from("Default values are required by some tools and clarify intent.")
}
}