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11ae581a4a
Ruby uses a recursive algorithm for handling control/meta escapes in strings (read_escape). However, the equivalent code for regexps (tokadd_escape) in did not use a recursive algorithm. Due to this, Handling of control/meta escapes in regexp did not have the same behavior as in strings, leading to behavior such as the following returning nil: ```ruby /\c\xFF/ =~ "\c\xFF" ``` Switch the code for handling \c, \C and \M in literal regexps to use the same code as for strings (read_escape), to keep behavior consistent between the two. Fixes [Bug #14367]
58 lines
1.4 KiB
Ruby
58 lines
1.4 KiB
Ruby
require_relative '../../spec_helper'
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require_relative '../fixtures/classes'
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describe "Regexps with interpolation" do
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it "allows interpolation of strings" do
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str = "foo|bar"
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/#{str}/.should == /foo|bar/
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end
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it "allows interpolation of literal regexps" do
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re = /foo|bar/
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/#{re}/.should == /(?-mix:foo|bar)/
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end
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it "allows interpolation of any object that responds to to_s" do
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o = Object.new
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def o.to_s
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"object_with_to_s"
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end
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/#{o}/.should == /object_with_to_s/
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end
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it "allows interpolation which mixes modifiers" do
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re = /foo/i
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/#{re} bar/m.should == /(?i-mx:foo) bar/m
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end
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it "allows interpolation to interact with other Regexp constructs" do
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str = "foo)|(bar"
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/(#{str})/.should == /(foo)|(bar)/
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str = "a"
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/[#{str}-z]/.should == /[a-z]/
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end
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it "gives precedence to escape sequences over substitution" do
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str = "J"
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/\c#{str}/.to_s.should include('{str}')
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end
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it "throws RegexpError for malformed interpolation" do
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s = ""
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-> { /(#{s}/ }.should raise_error(RegexpError)
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s = "("
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-> { /#{s}/ }.should raise_error(RegexpError)
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end
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it "allows interpolation in extended mode" do
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var = "#comment\n foo #comment\n | bar"
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(/#{var}/x =~ "foo").should == (/foo|bar/ =~ "foo")
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end
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it "allows escape sequences in interpolated regexps" do
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escape_seq = %r{"\x80"}n
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%r{#{escape_seq}}n.should == /(?-mix:"\x80")/n
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end
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end
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