Returns true if we are assuming that the target platform supports ECMAScript 6, false otherwise.
Returns true if we are assuming that the target platform supports ECMAScript 6, false otherwise.
This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write polyfills that can be dead-code-eliminated.
A typical usage of this method is:
if (assumingES6 || featureTest()) useES6Feature() else usePolyfill()
At link-time, assumingES6 will either be a constant false, in which
case the above snippet folds into
if (featureTest()) useES6Feature() else usePolyfill()
or a constant true, in which case it folds into
useES6Feature()
Returns true if we are linking for development, false otherwise.
Returns true if we are linking for development, false otherwise.
developmentMode is always equal to !productionMode.
This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write code that should only be executed in production mode or development mode.
A typical usage of this method is:
if (developmentMode) {
performExpensiveSanityChecks()
} At link-time, developmentMode will either be a constant true, in which
case the above snippet folds into
performExpensiveSanityChecks()
or a constant false, in which case it is dead-code-eliminated away, yielding maximum performance in production.
Returns true if we are linking for production, false otherwise.
Returns true if we are linking for production, false otherwise.
productionMode is always equal to !developmentMode.
This ends up being constant-folded to a constant at link-time. So constant-folding, inlining, and other local optimizations can be leveraged with this "constant" to write code that should only be executed in production mode or development mode.
A typical usage of this method is:
val warningsLogger = if (productionMode) new NullLogger else new ConsoleLogger
At link-time, productionMode will either be a constant true, in which
case the above snippet folds into
val warningsLogger = new NullLogger
or a constant false, in which case it folds into
val warningsLogger = new ConsoleLogger.