We recommend the following steps for all users:

. Try running `gradle help --scan` and view the https://gradle.com/enterprise/releases/2018.4/#identify-usages-of-deprecated-gradle-functionality[deprecations view] of the generated build scan.
+
image::deprecations.png[Deprecations View of a Gradle Build Scan]
+
This is so that you can see any deprecation warnings that apply to your build.
+

We recommend the following steps for all users:

. Try running `gradle help --scan` and view the https://gradle.com/enterprise/releases/2018.4/#identify-usages-of-deprecated-gradle-functionality[deprecations view] of the generated build scan.
+
image::deprecations.png[Deprecations View of a Gradle Build Scan]
+
This is so you can see any deprecation warnings that apply to your build.
+

			return false
		}
	}
	return true
}

// concat replaces the top of the stack (above the topmost '|' or '(') with its concatenation.
func (p *parser) concat() *Regexp {
	p.maybeConcat(-1, 0)

	// Scan down to find pseudo-operator | or (.
	i := len(p.stack)
	for i > 0 && p.stack[i-1].Op < opPseudo {
		i--
	}
	subs := p.stack[i:]
	p.stack = p.stack[:i]

	// Empty concatenation is special case.

The analysis identifies all IslandOps within the graph which could be merged together.
The goal is to merge as many islands as possible.
Once analysis is completed, the pass merges all IslandOps in a single scan.

For example given the following program with two disjunct islands:

```mlir
  func @test(%arg0 : tensor<i1>) -> tensor<f32> {
    %0 = tf_executor.graph {
      %1:2 = tf_executor.island {