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//! This module contains utilities for rendering turning things into something
//! that may be used to render in UI.
use super::*;
use std::fmt::{self, Display};
use join_to_string::join;
/// Contains information about a function signature
#[derive(Debug)]
pub struct FunctionSignature {
/// Optional visibility
pub visibility: Option<String>,
/// Name of the function
pub name: Option<String>,
/// Documentation for the function
pub doc: Option<Documentation>,
/// Generic parameters
pub generic_parameters: Vec<String>,
/// Parameters of the function
pub parameters: Vec<String>,
/// Optional return type
pub ret_type: Option<String>,
/// Where predicates
pub where_predicates: Vec<String>,
}
impl FunctionSignature {
pub(crate) fn with_doc_opt(mut self, doc: Option<Documentation>) -> Self {
self.doc = doc;
self
}
}
impl Display for FunctionSignature {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
if let Some(t) = &self.visibility {
write!(f, "{} ", t)?;
}
if let Some(name) = &self.name {
write!(f, "fn {}", name)?;
}
if !self.generic_parameters.is_empty() {
join(self.generic_parameters.iter())
.separator(", ")
.surround_with("<", ">")
.to_fmt(f)?;
}
join(self.parameters.iter()).separator(", ").surround_with("(", ")").to_fmt(f)?;
if let Some(t) = &self.ret_type {
write!(f, " -> {}", t)?;
}
if !self.where_predicates.is_empty() {
write!(f, "\nwhere ")?;
join(self.where_predicates.iter()).separator(",\n ").to_fmt(f)?;
}
Ok(())
}
}
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