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Disallow duplicated pattern variable

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This commit is contained in:
Kazuki Tsujimoto 2019-11-07 14:00:59 +09:00
parent 1e620c67af
commit a396bef8d8
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2 changed files with 100 additions and 12 deletions
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67
test/ruby/test_pattern_matching.rb
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@ -193,25 +193,25 @@ class TestPatternMatching < Test::Unit::TestCase
def test_var_pattern
# NODE_DASGN_CURR
assert_block do
case [0, 1]
in a, a
a == 1
case 0
in a
a == 0
end
end
# NODE_DASGN
b = 0
assert_block do
case [0, 1]
in b, b
case 1
in b
b == 1
end
end
# NODE_LASGN
case [0, 1]
in c, c
assert_equal(1, c)
case 0
in c
assert_equal(0, c)
else
flunk
end
@ -221,6 +221,57 @@ class TestPatternMatching < Test::Unit::TestCase
in ^a
end
}, /no such local variable/)
assert_syntax_error(%q{
case 0
in a, a
end
}, /duplicated variable name/)
assert_block do
case [0, 1, 2, 3]
in _, _, _a, _a
true
end
end
assert_syntax_error(%q{
case 0
in a, {a:}
end
}, /duplicated variable name/)
assert_syntax_error(%q{
case 0
in a, {"a":}
end
}, /duplicated variable name/)
assert_block do
case [0, "1"]
in a, "#{case 1; in a; a; end}"
true
end
end
assert_syntax_error(%q{
case [0, "1"]
in a, "#{case 1; in a; a; end}", a
end
}, /duplicated variable name/)
assert_block do
case 0
in a
true
in a
flunk
end
end
assert_syntax_error(%q{
0 in [a, a]
}, /duplicated variable name/)
end
def test_literal_value_pattern