Add non-captured block argument

Preparing for Crystal 1.8.0
https://github.com/crystal-lang/crystal/issues/8764

src/spectator/context.cr

@@ -5,7 +5,7 @@
 # The reason for this is to prevent name collision when using the DSL to define a spec.
 abstract class SpectatorContext
   # Evaluates the contents of a block within the scope of the context.
-  def eval
+  def eval(&)
     with self yield
   end
 

src/spectator/dsl/expectations.cr

@@ -182,7 +182,7 @@ module Spectator::DSL
     #   expect(false).to be_true
     # end
     # ```
-    def aggregate_failures(label = nil)
+    def aggregate_failures(label = nil, &)
       ::Spectator::Harness.current.aggregate_failures(label) do
         yield
       end

src/spectator/error_result.cr

@@ -11,7 +11,7 @@ module Spectator
     end
 
     # Calls the `error` method on *visitor*.
-    def accept(visitor)
+    def accept(visitor, &)
       visitor.error(yield self)
     end
 

src/spectator/example.cr

@@ -164,7 +164,7 @@ module Spectator
     # The context casted to an instance of *klass* is provided as a block argument.
     #
     # TODO: Benchmark compiler performance using this method versus client-side casting in a proc.
-    protected def with_context(klass)
+    protected def with_context(klass, &)
       context = klass.cast(@context)
       with context yield
     end
@@ -184,7 +184,7 @@ module Spectator
     end
 
     # Yields this example and all parent groups.
-    def ascend
+    def ascend(&)
       node = self
       while node
         yield node
@@ -279,7 +279,7 @@ module Spectator
       # The block given to this method will be executed within the test context.
       #
       # TODO: Benchmark compiler performance using this method versus client-side casting in a proc.
-      protected def with_context(klass)
+      protected def with_context(klass, &)
         context = @example.cast_context(klass)
         with context yield
       end

src/spectator/example_group.cr

@@ -87,7 +87,7 @@ module Spectator
     delegate size, unsafe_fetch, to: @nodes
 
     # Yields this group and all parent groups.
-    def ascend
+    def ascend(&)
       group = self
       while group
         yield group

src/spectator/fail_result.cr

@@ -24,7 +24,7 @@ module Spectator
     end
 
     # Calls the `failure` method on *visitor*.
-    def accept(visitor)
+    def accept(visitor, &)
       visitor.fail(yield self)
     end
 

src/spectator/formatting/components/block.cr

@@ -13,7 +13,7 @@ module Spectator::Formatting::Components
     end
 
     # Increases the indent by the a specific *amount* for the duration of the block.
-    private def indent(amount = INDENT)
+    private def indent(amount = INDENT, &)
       @indent += amount
       yield
       @indent -= amount
@@ -23,7 +23,7 @@ module Spectator::Formatting::Components
     # The contents of the line should be generated by a block provided to this method.
     # Ensure that _only_ one line is produced by the block,
     # otherwise the indent will be lost.
-    private def line(io)
+    private def line(io, &)
       @indent.times { io << ' ' }
       yield
       io.puts

src/spectator/harness.cr

@@ -43,7 +43,7 @@ module Spectator
     # The value of `.current` is set to the harness for the duration of the test.
     # It will be reset after the test regardless of the outcome.
     # The result of running the test code will be returned.
-    def self.run : Result
+    def self.run(&) : Result
       with_harness do |harness|
         harness.run { yield }
       end
@@ -53,7 +53,7 @@ module Spectator
     # The `.current` harness is set to the new harness for the duration of the block.
     # `.current` is reset to the previous value (probably nil) afterwards, even if the block raises.
     # The result of the block is returned.
-    private def self.with_harness
+    private def self.with_harness(&)
       previous = @@current
       begin
         @@current = harness = new
@@ -70,7 +70,7 @@ module Spectator
 
     # Runs test code and produces a result based on the outcome.
     # The test code should be called from within the block given to this method.
-    def run : Result
+    def run(&) : Result
       elapsed, error = capture { yield }
       elapsed2, error2 = capture { run_deferred }
       run_cleanup
@@ -106,7 +106,7 @@ module Spectator
       @cleanup << block
     end
 
-    def aggregate_failures(label = nil)
+    def aggregate_failures(label = nil, &)
       previous = @aggregate
       @aggregate = aggregate = [] of Expectation
       begin
@@ -135,7 +135,7 @@ module Spectator
 
     # Yields to run the test code and returns information about the outcome.
     # Returns a tuple with the elapsed time and an error if one occurred (otherwise nil).
-    private def capture : Tuple(Time::Span, Exception?)
+    private def capture(&) : Tuple(Time::Span, Exception?)
       error = nil
       elapsed = Time.measure do
         error = catch { yield }
@@ -146,7 +146,7 @@ module Spectator
     # Yields to run a block of code and captures exceptions.
     # If the block of code raises an error, the error is caught and returned.
     # If the block doesn't raise an error, then nil is returned.
-    private def catch : Exception?
+    private def catch(&) : Exception?
       yield
     rescue e
       e

src/spectator/matchers/exception_matcher.cr

@@ -97,7 +97,7 @@ module Spectator::Matchers
 
     # Runs a block of code and returns the exception it threw.
     # If no exception was thrown, *nil* is returned.
-    private def capture_exception
+    private def capture_exception(&)
       exception = nil
       begin
         yield

src/spectator/pass_result.cr

@@ -9,7 +9,7 @@ module Spectator
     end
 
     # Calls the `pass` method on *visitor*.
-    def accept(visitor)
+    def accept(visitor, &)
       visitor.pass(yield self)
     end
 

src/spectator/pending_result.cr

@@ -28,7 +28,7 @@ module Spectator
     end
 
     # Calls the `pending` method on the *visitor*.
-    def accept(visitor)
+    def accept(visitor, &)
       visitor.pending(yield self)
     end