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Added Symbol#start_with? and Symbol#end_with? method. [Feature #16348]

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nurse committed Nov 17, 2019
1 parent 76871de commit b5fbefbf2c14742f6d46ecdf3ce712062dfb1d0a
Showing with 70 additions and 0 deletions.
  1. +4 −0 NEWS
  2. +43 −0 string.c
  3. +23 −0 test/ruby/test_symbol.rb
4 NEWS
@@ -397,6 +397,10 @@ RubyVM::

String::

New methods::

* Added Symbol#start_with? and Symbol#end_with? method. [Feature #16348]

Unicode::

* Update Unicode version and Emoji version from 11.0.0 to
@@ -11075,6 +11075,46 @@ sym_swapcase(int argc, VALUE *argv, VALUE sym)
return rb_str_intern(rb_str_swapcase(argc, argv, rb_sym2str(sym)));
}

/*
* call-seq:
* sym.start_with?([prefixes]+) -> true or false
*
* Returns true if +sym+ starts with one of the +prefixes+ given.
* Each of the +prefixes+ should be a String or a Regexp.
*
* :hello.start_with?("hell") #=> true
* :hello.start_with?(/H/i) #=> true
*
* # returns true if one of the prefixes matches.
* :hello.start_with?("heaven", "hell") #=> true
* :hello.start_with?("heaven", "paradise") #=> false
*/

static VALUE
sym_start_with(int argc, VALUE *argv, VALUE sym)
{
return rb_str_start_with(argc, argv, rb_sym2str(sym));
}

/*
* call-seq:
* sym.end_with?([suffixes]+) -> true or false
*
* Returns true if +sym+ ends with one of the +suffixes+ given.
*
* :hello.end_with?("ello") #=> true
*
* # returns true if one of the +suffixes+ matches.
* :hello.end_with?("heaven", "ello") #=> true
* :hello.end_with?("heaven", "paradise") #=> false
*/

static VALUE
sym_end_with(int argc, VALUE *argv, VALUE sym)
{
return rb_str_end_with(argc, argv, rb_sym2str(sym));
}

/*
* call-seq:
* sym.encoding -> encoding
@@ -11361,5 +11401,8 @@ Init_String(void)
rb_define_method(rb_cSymbol, "capitalize", sym_capitalize, -1);
rb_define_method(rb_cSymbol, "swapcase", sym_swapcase, -1);

rb_define_method(rb_cSymbol, "start_with?", sym_start_with, -1);
rb_define_method(rb_cSymbol, "end_with?", sym_end_with, -1);

rb_define_method(rb_cSymbol, "encoding", sym_encoding, 0);
}
@@ -560,4 +560,27 @@ def ==(obj)
puts :a == :a
RUBY
end
def test_start_with?
assert_equal(true, :hello.start_with?("hel"))
assert_equal(false, :hello.start_with?("el"))
assert_equal(true, :hello.start_with?("el", "he"))
bug5536 = '[ruby-core:40623]'
assert_raise(TypeError, bug5536) {:str.start_with? :not_convertible_to_string}
assert_equal(true, :hello.start_with?(/hel/))
assert_equal("hel", $&)
assert_equal(false, :hello.start_with?(/el/))
assert_nil($&)
end
def test_end_with?
assert_equal(true, :hello.end_with?("llo"))
assert_equal(false, :hello.end_with?("ll"))
assert_equal(true, :hello.end_with?("el", "lo"))
bug5536 = '[ruby-core:40623]'
assert_raise(TypeError, bug5536) {:str.end_with? :not_convertible_to_string}
end
end

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