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2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
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14 package com.google.devtools.common.options;
15 
16 /**
17  * A function from an option parser's static setup (what flags it knows about) to an expansion
18  * String[] to use for one of its options.
19  */
20 public interface ExpansionFunction {
21 
22   /**
23    * Compute the expansion for an option. May be called at any time during or after the {@link
24    * OptionsParser}'s construction, or not at all.
25    *
26    * @param optionsData the parser's indexed information about its own options, before expansion
27    *     information is computed
28    * @return An expansion to use for all occurrences of this option in this parser
29    */
getExpansion(IsolatedOptionsData optionsData)30   public String[] getExpansion(IsolatedOptionsData optionsData);
31 }
32