/*
   LambdaParameterName
   format = ^(id)|([a-z][a-z0-9][a-zA-Z0-9]+)$
   
   
   */
   
   package com.puppycrawl.tools.checkstyle.checks.naming.lambdaparametername;
   
  import java.util.function.BiFunction;
  import java.util.function.Function;
  
  public class InputLambdaParameterName {
  
      Function<String, String> badNamedParameterWithoutParenthesis = s -> // violation 'must match'
              s.trim().toLowerCase();
  
      Function<String, String> badNamedParameterWithParenthesis = (st) -> // violation 'must match'
              st.trim().toLowerCase();
  
      BiFunction<String, String, String> twoBadNamedParameters = (s1, // violation 'must match'
                                                                  s2) -> s1 + s2;
      // violation above 'Name 's2' must match pattern'
  
      BiFunction<String, String, String> badNamedParameterInBiFunction =
              (first, s) -> first + s; // violation 'must match'
  
      Function<String, Integer> goodNamedParameterWithoutParenthesis =
              notTrimmedString -> notTrimmedString.trim().length();
  
      Function<String, Integer> goodNamedParameterWithParenthesis =
              (notTrimmedString) -> notTrimmedString.trim().length();
  
      BiFunction<String, String, Integer> goodNamedParameters =
              (first, second) -> (first + second).length();
  
  }