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Function std.string.stripLeft

Strips leading whitespace (as defined by isWhite) or as specified in the second argument.

auto stripLeft(Range) (
  Range input
if (isForwardRange!Range && isSomeChar!(ElementEncodingType!Range) && !isInfinite!Range && !isConvertibleToString!Range);

auto stripLeft(Range, Char) (
  Range input,
  const(Char)[] chars
if ((isForwardRange!Range && isSomeChar!(ElementEncodingType!Range) || isConvertibleToString!Range) && isSomeChar!Char);


input string or forward range of characters
chars string of characters to be stripped


input stripped of leading whitespace or characters specified in the second argument.


input and the returned value will share the same tail (see sameTail).

See Also

Generic stripping on ranges: stripLeft


import std.uni : lineSep, paraSep;
assert(stripLeft("     hello world     ") ==
       "hello world     ");
assert(stripLeft("\n\t\v\rhello world\n\t\v\r") ==
       "hello world\n\t\v\r");
assert(stripLeft(" \u2028hello world") ==
       "hello world");
assert(stripLeft("hello world") ==
       "hello world");
assert(stripLeft([lineSep] ~ "hello world" ~ lineSep) ==
       "hello world" ~ [lineSep]);
assert(stripLeft([paraSep] ~ "hello world" ~ paraSep) ==
       "hello world" ~ [paraSep]);

import std.array : array;
import std.utf : byChar;
assert(stripLeft("     hello world     "w.byChar).array ==
       "hello world     ");
assert(stripLeft("     \u2022hello world     ".byChar).array ==
       "\u2022hello world     ");


assert(stripLeft("     hello world     ", " ") ==
       "hello world     ");
assert(stripLeft("xxxxxhello world     ", "x") ==
       "hello world     ");
assert(stripLeft("xxxyy    hello world     ", "xy ") ==
       "hello world     ");


import std.array : array;
import std.utf : byChar, byWchar, byDchar;

assert(stripLeft("  xxxyy hello world     "w.byChar, "xy ").array ==
       "hello world     ");

assert(stripLeft("\u2028\u2020hello world\u2028"w.byWchar,
                 "\u2028").array == "\u2020hello world\u2028");
assert(stripLeft("\U00010001hello world"w.byWchar, " ").array ==
       "\U00010001hello world"w);
assert(stripLeft("\U00010001 xyhello world"d.byDchar,
                 "\U00010001 xy").array == "hello world"d);

writeln(stripLeft("\u2020hello"w, "\u2020"w)); // "hello"w
writeln(stripLeft("\U00010001hello"d, "\U00010001"d)); // "hello"d
writeln(stripLeft(" hello ", "")); // " hello "


Walter Bright, Andrei Alexandrescu, Jonathan M Davis, and David L. 'SpottedTiger' Davis


Boost License 1.0.