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carbon-lang/executable_semantics/testdata/tuple_assign.golden
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Jon Meow 6e5070de18 Adapting jsiek's executable semantics tooling for commit. (#237) 
Notes versus what jsiek wrote:

- This adopts Bazel for building.
    - System-local versions of bison/flex are used. I found https://github.com/jmillikin/rules_bison, but those print a lot of warnings (things like -Wsign-compare IIRC) which makes builds hard to read. Plus I think the underlying bison_cc_library rule didn't work, so this would really only get a hermetic bison/flex build (helpful, but didn't seem worth more time).
    - I'm adding in a .bazeliskrc to push a somewhat more standard choice of bazel versions. I noticed I was getting unstable versions by default, possible Google-specific, but seemed good to include.
    - The `-lpthread` kludge.
- Turn all of the examples into golden tests.
    - Including adding a golden test rule.
- Fixed various style guide issues. For example:
    - Fixing function names to be CamelCase instead of snake_case (https://google.github.io/styleguide/cppguide.html#Function_Names)
    - Removed exception use (https://google.github.io/styleguide/cppguide.html#Exceptions)
    - File name fixes (https://github.com/carbon-language/carbon-lang/blob/trunk/docs/project/cpp_style_guide.md#file-names)
- Dropped `using` of `std` names -- I believe this is preferred (maybe we should be explicit about this in the Carbon style guide)
- Switched `enum` uses to `enum class` for ease-of-identification.
- Spent some time breaking out files to hopefully be easier to read/edit pieces, and understand relations between structs.
- Added `code requires` to `syntax.ypp` to address include issues

Possibly other things -- but the fundamental structure is, I believe, unchanged. I put in the golden tests pretty early to ensure I wasn't mutating output/results.
2021-02-19 15:25:43 -08:00

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********** source program **********
fn main () -> Int {
var auto: x = 0;
var auto: y = 1;
(0 = x, 1 = y) = (0 = 5, 1 = (- 5));
return (x + y);
}
********** type checking **********
--- step exp Int --->
--- step exp Int --->
--- step exp auto --->
--- step exp auto --->
********** type checking complete **********
fn main () -> Int {
var auto: x = 0;
var auto: y = 1;
(0 = x, 1 = y) = (0 = 5, 1 = (- 5));
return (x + y);
}
********** starting execution **********
********** initializing globals **********
--- step exp () --->
********** calling main function **********
{
stack: top{main()<-1>}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp main() --->
{
stack: top{main<-1> :: main()<0>}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp main --->
{
stack: top{fun<main><-1> :: main()<0>}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value fun<main> with main()<1>(fun<main>,) --->
{
stack: top{()<-1> :: main()<1>(fun<main>,)}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp () --->
{
stack: top{()<-1> :: main()<1>(fun<main>,)}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value () with main()<2>(fun<main>,(),) --->
pattern_match((), ())
{
stack: main{var auto: x = 0; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var auto: x = 0; ... --->
{
stack: main{var auto: x = 0;<-1> :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var auto: x = 0; --->
{
stack: main{0<-1> :: var auto: x = 0;<0> :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp 0 --->
{
stack: main{0<-1> :: var auto: x = 0;<0> :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value 0 with var auto: x = 0;<1>(0,) --->
{
stack: main{auto: x<-1> :: var auto: x = 0;<1>(0,) :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp auto: x --->
{
stack: main{auto<-1> :: auto: x<0> :: var auto: x = 0;<1>(0,) :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp auto --->
{
stack: main{auto<-1> :: auto: x<0> :: var auto: x = 0;<1>(0,) :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value auto with auto: x<1>(auto,) --->
{
stack: main{auto: x<-1> :: var auto: x = 0;<1>(0,) :: var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value auto: x with var auto: x = 0;<2>(0,auto: x,) --->
pattern_match(auto: x, 0)
{
stack: main{var auto: y = 1; ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt var auto: y = 1; ... --->
{
stack: main{var auto: y = 1;<-1> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt var auto: y = 1; --->
{
stack: main{1<-1> :: var auto: y = 1;<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp 1 --->
{
stack: main{1<-1> :: var auto: y = 1;<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value 1 with var auto: y = 1;<1>(1,) --->
{
stack: main{auto: y<-1> :: var auto: y = 1;<1>(1,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp auto: y --->
{
stack: main{auto<-1> :: auto: y<0> :: var auto: y = 1;<1>(1,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp auto --->
{
stack: main{auto<-1> :: auto: y<0> :: var auto: y = 1;<1>(1,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value auto with auto: y<1>(auto,) --->
{
stack: main{auto: y<-1> :: var auto: y = 1;<1>(1,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value auto: y with var auto: y = 1;<2>(1,auto: y,) --->
pattern_match(auto: y, 1)
{
stack: main{(0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... <-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- step stmt (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); ... --->
{
stack: main{(0 = x, 1 = y) = (0 = 5, 1 = (- 5));<-1> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- step stmt (0 = x, 1 = y) = (0 = 5, 1 = (- 5)); --->
{
stack: main{(0 = x, 1 = y)<-1> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- step lvalue (0 = x, 1 = y) --->
{
stack: main{x<-1> :: (0 = x, 1 = y)<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- step lvalue x --->
{
stack: main{ptr<1><-1> :: (0 = x, 1 = y)<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value ptr<1> with (0 = x, 1 = y)<1>(ptr<1>,) --->
{
stack: main{y<-1> :: (0 = x, 1 = y)<1>(ptr<1>,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- step lvalue y --->
{
stack: main{ptr<2><-1> :: (0 = x, 1 = y)<1>(ptr<1>,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value ptr<2> with (0 = x, 1 = y)<2>(ptr<1>,ptr<2>,) --->
{
stack: main{(0 = ptr<1>@3, 1 = ptr<2>@4)<-1> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<0> :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value (0 = ptr<1>@3, 1 = ptr<2>@4) with (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) --->
{
stack: main{(0 = 5, 1 = (- 5))<-1> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- step exp (0 = 5, 1 = (- 5)) --->
{
stack: main{5<-1> :: (0 = 5, 1 = (- 5))<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- step exp 5 --->
{
stack: main{5<-1> :: (0 = 5, 1 = (- 5))<0> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value 5 with (0 = 5, 1 = (- 5))<1>(5,) --->
{
stack: main{(- 5)<-1> :: (0 = 5, 1 = (- 5))<1>(5,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- step exp (- 5) --->
{
stack: main{5<-1> :: (- 5)<0> :: (0 = 5, 1 = (- 5))<1>(5,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- step exp 5 --->
{
stack: main{5<-1> :: (- 5)<0> :: (0 = 5, 1 = (- 5))<1>(5,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value 5 with (- 5)<1>(5,) --->
{
stack: main{-5<-1> :: (0 = 5, 1 = (- 5))<1>(5,) :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value -5 with (0 = 5, 1 = (- 5))<2>(5,-5,) --->
{
stack: main{(0 = 5@5, 1 = -5@6)<-1> :: (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<1>((0 = ptr<1>@3, 1 = ptr<2>@4),) :: return (x + y);<-1>} :: top{}
heap: fun<main>, 0, 1, ptr<1>, ptr<2>, 5, -5,
env: y: 1, x: 0, main: fun<main>,
}
--- handle value (0 = 5@5, 1 = -5@6) with (0 = x, 1 = y) = (0 = 5, 1 = (- 5));<2>((0 = ptr<1>@3, 1 = ptr<2>@4),(0 = 5@5, 1 = -5@6),) --->
{
stack: main{return (x + y);<-1>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- step stmt return (x + y); --->
{
stack: main{(x + y)<-1> :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- step exp (x + y) --->
{
stack: main{x<-1> :: (x + y)<0> :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- step exp x --->
{
stack: main{5<-1> :: (x + y)<0> :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- handle value 5 with (x + y)<1>(5,) --->
{
stack: main{y<-1> :: (x + y)<1>(5,) :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- step exp y --->
{
stack: main{-5<-1> :: (x + y)<1>(5,) :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- handle value -5 with (x + y)<2>(5,-5,) --->
{
stack: main{0<-1> :: return (x + y);<0>} :: top{}
heap: fun<main>, 5, -5, ptr<1>, ptr<2>, 5, -5,
env: y: -5, x: 5, main: fun<main>,
}
--- handle value 0 with return (x + y);<1>(0,) --->
{
stack: top{0<-1>}
heap: fun<main>, !!5, !!-5, ptr<1>, ptr<2>, !!5, !!-5,
env: main: fun<main>,
}
result: 0
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