Crystal 1.15 prep

.github/workflows/doc-generator.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Install Crystal
         uses: crystal-lang/install-crystal@cdf26dcd488490c9939e9d4d62cab169c9e4f20d
         with:
-          crystal: "1.14.0"
+          crystal: "1.15.0"
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Run generator tests
         run: crystal spec ./document-generator/spec/*
@@ -26,7 +26,7 @@ jobs:
       - name: Install Crystal
         uses: crystal-lang/install-crystal@cdf26dcd488490c9939e9d4d62cab169c9e4f20d
         with:
-          crystal: "1.14.0"
+          crystal: "1.15.0"
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Run generator tests
         run: crystal document-generator/scripts/check_docs.cr

.github/workflows/tests.yml

@@ -42,7 +42,7 @@ jobs:
     strategy:
       # Allows running the job multiple times with different configurations
       matrix:
-        crystal: ["1.10", "1.11", "1.12", "1.13", "1.14.0"]
+        crystal: ["1.11", "1.12", "1.13", "1.14", "1.15"]
     container:
       image: crystallang/crystal:${{ matrix.crystal }}
     steps:
@@ -58,7 +58,7 @@ jobs:
       - name: Install Crystal
         uses: crystal-lang/install-crystal@cdf26dcd488490c9939e9d4d62cab169c9e4f20d
         with:
-          crystal: "1.14.0"
+          crystal: "1.15.0"
       - name: 'Setup jq'
         run: choco install jq
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

README.md

@@ -4,7 +4,7 @@
 <p vertical-align="middle"><h1>Exercism Crystal Track</h1></p>
 
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![Discourse topics](https://img.shields.io/discourse/topics?color=8A08E6&label=Connect%20&labelColor=FFDF58&logo=Discourse&logoColor=8A08E6&server=https%3A%2F%2Fforum.exercism.org&style=social)](https://forum.exercism.org)
-&nbsp;[![Exercism_II](https://img.shields.io/badge/Exercism--Built-9101FF?logo=crystal&logoColor=000000&labelColor=E5E5E5&label=Crystal%201.14.0%20Powered)](https://exercism.org)
+&nbsp;[![Exercism_II](https://img.shields.io/badge/Exercism--Built-9101FF?logo=crystal&logoColor=000000&labelColor=E5E5E5&label=Crystal%201.15.0%20Powered)](https://exercism.org)
 &nbsp;[![Exercism_III](https://img.shields.io/badge/Open-11b30e?labelColor=3D454D&label=Contributions)](https://exercism.org/blog/freeing-our-maintainers) &nbsp;[![Build Status](https://github.com/exercism/crystal/workflows/Tests/badge.svg)](https://github.com/exercism/crystal/actions/workflows/tests.yml)
 
 <br>
@@ -16,7 +16,7 @@ Hi. &nbsp;👋🏽 &nbsp;👋 &nbsp;**We are happy you are here.**&nbsp; 🎉&nb
 **`exercism/Crystal`** is one of many programming language tracks on [exercism(dot)org][exercism-website].
 This repo holds all the instructions, tests, code, & support files for Crystal _exercises_ currently under development or implemented & available for students.
 
-🌟 &nbsp;&nbsp;Track tooling (_test-runner, representer, analyzer, and Continuous Integration_) runs on Crystal `1.14.0`. <br>
+🌟 &nbsp;&nbsp;Track tooling (_test-runner, representer, analyzer, and Continuous Integration_) runs on Crystal `1.15.0`. <br>
 🌟 &nbsp;&nbsp;Most exercises are solvable with Crystal `1.0.0` or higher.
 
 This track is made up of **Practice Exercises**. Practice exercises are open-ended, and can be used to practice concepts learned, try out new techniques, and play.

exercises/practice/binary-search-tree/.meta/src/example.cr

@@ -38,7 +38,7 @@ class Node(T)
     end
   end
 
-  def each
+  def each(&)
     TreeIterator.new(self).each do |v|
       yield v
     end

exercises/practice/markdown/.meta/src/example.cr

@@ -6,8 +6,7 @@ class Markdown
     lines = @markdown.split("\n")
     lines.each_with_index do |line, index|
       level = line.scan(/^#+/)
-      # TODO: Use present? method when Crystal1.10 is dropped
-      if !level.empty? && level[0][0].size <= 6
+      if level.present? && level[0][0].size <= 6
         level = level[0][0].size
         result += "<h#{level}>#{parse_line(line[(level + 1)..-1])}</h#{level}>"
       elsif line.starts_with?('*')

exercises/practice/react/.meta/src/example.cr

@@ -29,11 +29,11 @@ module React
     @last_callback_value : CellValue
 
     def initialize(input : Cell, &compute : CellValue -> CellValue)
-      initialize(->{ compute.call(input.value) }, input)
+      initialize(-> { compute.call(input.value) }, input)
     end
 
     def initialize(input1 : Cell, input2 : Cell, &compute : (CellValue, CellValue) -> CellValue)
-      initialize(->{ compute.call(input1.value, input2.value) }, input1, input2)
+      initialize(-> { compute.call(input1.value, input2.value) }, input1, input2)
     end
 
     private def initialize(@new_value : -> CellValue, *dependencies : Cell)

exercises/practice/strain/.meta/src/example.cr

@@ -1,11 +1,11 @@
 class Array(T)
-  def keep
+  def keep(&)
     kept = Array(T).new
     each { |e| kept << e if yield(e) }
     kept
   end
 
-  def discard
+  def discard(&)
     keep { |e| !yield(e) }
   end
 end

exercises/practice/word-search/.meta/src/example.cr

@@ -22,7 +22,7 @@ module WordSearch
     results
   end
 
-  private def self.each_delta
+  private def self.each_delta(&)
     [-1, 0, 1].each do |dx|
       [-1, 0, 1].each do |dy|
         yield(dx, dy) if dx != 0 || dy != 0