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Add a manual Debug formatter for Collection to make debugging nicer

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This commit is contained in:
Joshua Warner 2021-11-13 16:24:35 -08:00
parent 9bf1674946
commit 3ff3695758
1 changed files with 16 additions and 1 deletions
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17
compiler/parse/src/ast.rs
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@ -1,3 +1,5 @@
use std::fmt::Debug;
use crate::header::{AppHeader, ImportsEntry, InterfaceHeader, PlatformHeader, TypedIdent};
use crate::ident::Ident;
use bumpalo::collections::{String, Vec};
@ -489,7 +491,7 @@ impl<'a> Pattern<'a> {
}
}
}
#[derive(Copy, Clone, Debug)]
#[derive(Copy, Clone)]
pub struct Collection<'a, T> {
pub items: &'a [T],
// Use a pointer to a slice (rather than just a slice), in order to avoid bloating
@ -597,6 +599,19 @@ impl<'a, T: PartialEq> PartialEq for Collection<'a, T> {
}
}
impl<'a, T: Debug> Debug for Collection<'a, T> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if self.final_comments().is_empty() {
f.debug_list().entries(self.items.iter()).finish()
} else {
f.debug_struct("Collection")
.field("items", &self.items)
.field("final_comments", &self.final_comments())
.finish()
}
}
}
pub trait Spaceable<'a> {
fn before(&'a self, _: &'a [CommentOrNewline<'a>]) -> Self;
fn after(&'a self, _: &'a [CommentOrNewline<'a>]) -> Self;