fn build_args(args: ArgMatches) -> Args {
  let pattern = args.value_of("pattern")
                    .expect("<pattern> not in ArgMatches") // pattern is required.
                    .to_owned();

  let files: Box<[PathBuf]> = args.values_of_os("files")
                                  .expect("<files> not in ArgMatches")
                                  .map(PathBuf::from)
                                  .collect();

  let flag = |f| args.is_present(f);

  let output_flags = (
    flag("only-matching"),
    flag("byte-offset"),
    flag("files-with-matches"),
    flag("files-without-matches")
  );

  let output = match output_flags {
    (true, _, _, _) => Output::Bytes,
    (_, true, _, _) => Output::Offset,
    (_, _, true, _) => Output::FileName,
    (_, _, _, true) => Output::FileName,
    (_, _, _, _)    => Default::default(),
  };

  Args {
    options: Options {
      inverse: flag("invert-match"),
      case_insensitive: flag("ignore-case"),
      trim_ending_newline: flag("trim-ending-newline"),
      non_matching: flag("files-without-matches"),
      print_filename: flag("with-filename") || !(flag("no-filename") || files.len() == 1),
      output
    },
    pattern,
    files
  }
}
/// Build an `Args` from clap's `ArgMatches`.
/// The matches are supposed to be valid, therefore there is no error handling/reporting.
Build an `Args` from clap's `ArgMatches`.
The matches are supposed to be valid, therefore there is no error handling/reporting.
Build an ` Args ` from clap ' s ` ArgMatches ` . The matches are supposed to be valid therefore there is no error handling / reporting .
fn build_args(args: ArgMatches) -> Args {
  let pattern = args.value_of("pattern")
                    .expect("<pattern> not in ArgMatches") // pattern is required.
                    .to_owned();
  let files: Box<[PathBuf]> = args.values_of_os("files")
                                  .expect("<files> not in ArgMatches")
                                  .map(PathBuf::from)
                                  .collect();
  let flag = |f| args.is_present(f);
  let output_flags = (
    flag("only-matching"),
    flag("byte-offset"),
    flag("files-with-matches"),
    flag("files-without-matches")
  );
  let output = match output_flags {
    (true, _, _, _) => Output::Bytes,
    (_, true, _, _) => Output::Offset,
    (_, _, true, _) => Output::FileName,
    (_, _, _, true) => Output::FileName,
    (_, _, _, _)    => Default::default(),
  };
  Args {
    options: Options {
      inverse: flag("invert-match"),
      case_insensitive: flag("ignore-case"),
      trim_ending_newline: flag("trim-ending-newline"),
      non_matching: flag("files-without-matches"),
      print_filename: flag("with-filename") || !(flag("no-filename") || files.len() == 1),
      output
    },
    pattern,
    files
  }
}
fn build_args ( args : ArgMatches ) -> Args { let pattern = args . value_of ( " " ) . expect ( " " ) // pattern is required. . to_owned ( ) ; let files : Box < [ PathBuf ] > = args . values_of_os ( " " ) . expect ( " " ) . map ( PathBuf :: from ) . collect ( ) ; let flag = | f | args . is_present ( f ) ; let output_flags = ( flag ( " " ) , flag ( " " ) , flag ( " " ) , flag ( " " ) ) ; let output = match output_flags { ( true , _ , _ , _ ) => Output :: Bytes , ( _ , true , _ , _ ) => Output :: Offset , ( _ , _ , true , _ ) => Output :: FileName , ( _ , _ , _ , true ) => Output :: FileName , ( _ , _ , _ , _ ) => Default :: default ( ) , } ; Args { options : Options { inverse : flag ( " " ) , case_insensitive : flag ( " " ) , trim_ending_newline : flag ( " " ) , non_matching : flag ( " " ) , print_filename : flag ( " " ) || ! ( flag ( " " ) || files . len ( ) == 1 ) , output } , pattern , files } }
Build an `Args` from clap's `ArgMatches`.
Build an ` Args ` from clap ' s ` ArgMatches ` .
args
ArgMatches
args
ArgMatches