From 74b4e78ebc2a01f4d502a2e88184bc96b6847f2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nero=20Blackstone=E2=80=8B?= <gf7600gs@gmail.com>
Date: Sun, 15 Jan 2023 16:33:18 +0800
Subject: [PATCH] Implement `Base.empty!` and `Base.isempty` (#158)

* Implement Base.empty! and Base.isempty

* change log updated
---
 .gitignore   | 1 +
 CHANGELOG.md | 2 ++
 Project.toml | 2 +-
 src/note.jl  | 2 ++
 test/note.jl | 8 ++++++++
 5 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index b6f8b8d..151bf6f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 *.jl.cov
 *.jl.mem
 Manifest.toml
+.vscode
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c60e98f..fb08e95 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+# v2.4.0
+* Implement `Base.empty!(::Notes)` and `Base.isempty(::Notes)`.
 # v2.3.0
 * New functions `is_octave`.
 * Implement `Base.keys(::Notes)` and `Base.eachindex(::Notes)`.
diff --git a/Project.toml b/Project.toml
index 02dc1bf..06726a9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "MIDI"
 uuid = "f57c4921-e30c-5f49-b073-3f2f2ada663e"
 repo = "https://github.com/JuliaMusic/MIDI.jl.git"
-version = "2.3.0"
+version = "2.4.0"
 
 [deps]
 FileIO = "5789e2e9-d7fb-5bc7-8068-2c6fae9b9549"
diff --git a/src/note.jl b/src/note.jl
index 8a7290c..55feffd 100644
--- a/src/note.jl
+++ b/src/note.jl
@@ -109,6 +109,8 @@ Base.getindex(n::Notes, r) = Notes(n.notes[r], n.tpq)
 Base.view(n::Notes, r) = view(n.notes, r)
 Base.eachindex(n::Notes) = eachindex(n.notes)
 Base.keys(n::Notes) = eachindex(n)
+Base.empty!(n::Notes) = empty!(n.notes)
+Base.isempty(n::Notes)::Bool = isempty(n.notes)
 
 # Pushing
 Base.push!(no::Notes{N}, n::N) where {N <: AbstractNote} = push!(no.notes, n)
diff --git a/test/note.jl b/test/note.jl
index cb99bb1..f5eb9cb 100644
--- a/test/note.jl
+++ b/test/note.jl
@@ -76,4 +76,12 @@ end
     @test notes[index_max].pitch == name_to_pitch("D5")
     min_pitch, index_min = findmin(n -> n.pitch, notes)
     @test notes[index_min].pitch == name_to_pitch("C4")
+end
+
+@testset "check empty" begin
+    n1 = Note(name_to_pitch("C4"),0)
+    notes = Notes([n1])
+    @test !isempty(notes)
+    empty!(notes)
+    @test isempty(notes)
 end
\ No newline at end of file