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use crate::linter::{Rule, RuleResult};
use sv_parser::{unwrap_locate, NodeEvent, RefNode, StatementItem, StatementOrNull, SyntaxTree};
#[derive(Default)]
pub struct IfWithBegin;
impl Rule for IfWithBegin {
fn check(&mut self, syntax_tree: &SyntaxTree, event: &NodeEvent) -> RuleResult {
let node = match event {
NodeEvent::Enter(x) => x,
NodeEvent::Leave(_) => {
return RuleResult::Pass;
}
};
match node {
RefNode::ConditionalStatement(x) => {
let (ref a, ref b, ref c, ref d, ref e, ref f) = x.nodes;
let mut if_str = String::from("");
syntax_tree.get_str(a).map(|x| if_str.push_str(x));
syntax_tree.get_str(b).map(|x| if_str.push_str(x));
syntax_tree.get_str(c).map(|x| if_str.push_str(x));
syntax_tree.get_str_trim(d).map(|x| if_str.push_str(x));
if let StatementOrNull::Statement(x) = d {
let (_, _, ref x) = x.nodes;
match x {
StatementItem::SeqBlock(_) => (),
_ => {
if if_str.contains('\n') {
return RuleResult::Fail;
}
}
}
}
for e in e {
let (ref a, ref b, ref c, ref d) = e;
let mut elsif_str = String::from("");
syntax_tree.get_str(a).map(|x| elsif_str.push_str(x));
syntax_tree.get_str(b).map(|x| elsif_str.push_str(x));
syntax_tree.get_str(c).map(|x| elsif_str.push_str(x));
syntax_tree.get_str_trim(d).map(|x| elsif_str.push_str(x));
if let StatementOrNull::Statement(x) = d {
let (_, _, ref x) = x.nodes;
match x {
StatementItem::SeqBlock(_) => (),
_ => {
if elsif_str.contains('\n') {
let locate = unwrap_locate!(a).unwrap();
return RuleResult::FailLocate(*locate);
}
}
}
};
}
if let Some(f) = f {
let (ref a, ref b) = f;
let mut else_str = String::from("");
syntax_tree.get_str(a).map(|x| else_str.push_str(x));
syntax_tree.get_str_trim(b).map(|x| else_str.push_str(x));
if let StatementOrNull::Statement(x) = b {
let (_, _, ref x) = x.nodes;
match x {
StatementItem::SeqBlock(_) => (),
_ => {
if else_str.contains('\n') {
let locate = unwrap_locate!(a).unwrap();
return RuleResult::FailLocate(*locate);
}
}
}
};
}
RuleResult::Pass
}
_ => RuleResult::Pass,
}
}
fn name(&self) -> String {
String::from("if_with_begin")
}
fn hint(&self) -> String {
String::from("multiline `if` statement must have `begin`")
}
fn reason(&self) -> String {
String::from("if there is not `begin`, the second statement are confusing")
}
}