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require "../../spec_helper"
describe "Code gen: struct" do
it "creates structs" do
run("
struct Foo
end
f = Foo.allocate
1
").to_i.should eq(1)
end
it "creates structs with instance var" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
end
f = Foo.new(1)
f.x
").to_i.should eq(1)
end
it "assigning a struct makes a copy (1)" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
def x=(@x)
end
end
f = Foo.new(1)
g = f
g.x = 2
g.x
").to_i.should eq(2)
end
it "assigning a struct makes a copy (2)" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
def x=(@x)
end
end
f = Foo.new(1)
g = f
g.x = 2
f.x
").to_i.should eq(1)
end
it "passes a struct as a parameter makes a copy" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
def x=(@x)
end
end
def foo(f)
f.x = 2
end
f = Foo.new(1)
foo(f)
f.x
").to_i.should eq(1)
end
it "passes a generic struct as a parameter makes a copy" do
run("
struct Foo(T)
def initialize(@x)
end
def x
@x
end
def x=(@x)
end
end
def foo(f)
f.x = 2
end
f = Foo(Int32).new(1)
foo(f)
f.x
").to_i.should eq(1)
end
it "returns struct as a copy" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
def x=(@x)
end
end
def foo(f)
f.x = 2
f
end
f = Foo.new(1)
g = foo(f)
g.x
").to_i.should eq(2)
end
it "creates struct in def" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
end
def foo
Foo.new(1)
end
foo.x
").to_i.should eq(1)
end
it "declares const struct" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
end
FOO = Foo.new(1)
FOO.x
").to_i.should eq(1)
end
it "uses struct in if" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
end
FOO = Foo.new(1)
if 1 == 2
$foo = Foo.new(1)
else
$foo = FOO
end
$foo.x
").to_i.should eq(1)
end
it "uses nilable struct" do
run("
Ary Borenszweig
committed
struct Nil
Ary Borenszweig
committed
struct Value
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def nil?
false
end
end
struct Foo
end
f = Foo.new || nil
f.nil? ? 1 : 2
").to_i.should eq(2)
end
it "returns self" do
run("
struct Foo
def initialize(@x)
end
def foo
@x = 2
return self
end
def x
@x
end
end
f = Foo.new(1)
g = f.foo
g.x
").to_i.should eq(2)
end
it "returns self with block" do
run("
struct Foo
def initialize(@x)
end
def foo
@x = 2
yield 1
self
end
def x
@x
end
end
f = Foo.new(1)
g = f.foo { }
g.x
").to_i.should eq(2)
end
it "does phi of struct" do
run("
struct Foo
def initialize(@x)
end
def x
@x
end
end
x = if 1 == 2
Foo.new(2)
else
Foo.new(1)
end
x.x
").to_i.should eq(1)
end
Ary Borenszweig
committed
it "allows assinging to struct argument (bug)" do
run("
struct Foo
def bar
2
end
end
def foo(x)
x = x.bar
end
foo(Foo.new)
").to_i.should eq(2)
end