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carbon-lang/executable_semantics/testdata/pattern_init.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 (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);
return ((y - x) - 1);
}
********** type checking **********
--- step exp Int --->
--- step exp Int --->
--- step exp auto --->
--- step exp auto --->
********** type checking complete **********
fn main () -> Int {
var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);
return ((y - x) - 1);
}
********** 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 (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3); ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3); ... --->
{
stack: main{var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<-1> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3); --->
{
stack: main{(0 = 2, 1 = 3)<-1> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp (0 = 2, 1 = 3) --->
{
stack: main{2<-1> :: (0 = 2, 1 = 3)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp 2 --->
{
stack: main{2<-1> :: (0 = 2, 1 = 3)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value 2 with (0 = 2, 1 = 3)<1>(2,) --->
{
stack: main{3<-1> :: (0 = 2, 1 = 3)<1>(2,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp 3 --->
{
stack: main{3<-1> :: (0 = 2, 1 = 3)<1>(2,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value 3 with (0 = 2, 1 = 3)<2>(2,3,) --->
{
stack: main{(0 = 2@1, 1 = 3@2)<-1> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<0> :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- handle value (0 = 2@1, 1 = 3@2) with var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) --->
{
stack: main{(0 = auto: x, 1 = auto: y)<-1> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- step exp (0 = auto: x, 1 = auto: y) --->
{
stack: main{auto: x<-1> :: (0 = auto: x, 1 = auto: y)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- step exp auto: x --->
{
stack: main{auto<-1> :: auto: x<0> :: (0 = auto: x, 1 = auto: y)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- step exp auto --->
{
stack: main{auto<-1> :: auto: x<0> :: (0 = auto: x, 1 = auto: y)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- handle value auto with auto: x<1>(auto,) --->
{
stack: main{auto: x<-1> :: (0 = auto: x, 1 = auto: y)<0> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- handle value auto: x with (0 = auto: x, 1 = auto: y)<1>(auto: x,) --->
{
stack: main{auto: y<-1> :: (0 = auto: x, 1 = auto: y)<1>(auto: x,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- step exp auto: y --->
{
stack: main{auto<-1> :: auto: y<0> :: (0 = auto: x, 1 = auto: y)<1>(auto: x,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- step exp auto --->
{
stack: main{auto<-1> :: auto: y<0> :: (0 = auto: x, 1 = auto: y)<1>(auto: x,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- handle value auto with auto: y<1>(auto,) --->
{
stack: main{auto: y<-1> :: (0 = auto: x, 1 = auto: y)<1>(auto: x,) :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3,
env: main: fun<main>,
}
--- handle value auto: y with (0 = auto: x, 1 = auto: y)<2>(auto: x,auto: y,) --->
{
stack: main{(0 = auto: x@3, 1 = auto: y@4)<-1> :: var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<1>((0 = 2@1, 1 = 3@2),) :: return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y,
env: main: fun<main>,
}
--- handle value (0 = auto: x@3, 1 = auto: y@4) with var (0 = auto: x, 1 = auto: y) = (0 = 2, 1 = 3);<2>((0 = 2@1, 1 = 3@2),(0 = auto: x@3, 1 = auto: y@4),) --->
pattern_match((0 = auto: x@3, 1 = auto: y@4), (0 = 2@1, 1 = 3@2))
pattern_match(auto: x, 2)
pattern_match(auto: y, 3)
{
stack: main{return ((y - x) - 1);<-1>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step stmt return ((y - x) - 1); --->
{
stack: main{((y - x) - 1)<-1> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step exp ((y - x) - 1) --->
{
stack: main{(y - x)<-1> :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step exp (y - x) --->
{
stack: main{y<-1> :: (y - x)<0> :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step exp y --->
{
stack: main{3<-1> :: (y - x)<0> :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- handle value 3 with (y - x)<1>(3,) --->
{
stack: main{x<-1> :: (y - x)<1>(3,) :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step exp x --->
{
stack: main{2<-1> :: (y - x)<1>(3,) :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- handle value 2 with (y - x)<2>(3,2,) --->
{
stack: main{1<-1> :: ((y - x) - 1)<0> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- handle value 1 with ((y - x) - 1)<1>(1,) --->
{
stack: main{1<-1> :: ((y - x) - 1)<1>(1,) :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- step exp 1 --->
{
stack: main{1<-1> :: ((y - x) - 1)<1>(1,) :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- handle value 1 with ((y - x) - 1)<2>(1,1,) --->
{
stack: main{0<-1> :: return ((y - x) - 1);<0>} :: top{}
heap: fun<main>, 2, 3, auto: x, auto: y, 2, 3,
env: y: 3, x: 2, main: fun<main>,
}
--- handle value 0 with return ((y - x) - 1);<1>(0,) --->
{
stack: top{0<-1>}
heap: fun<main>, 2, 3, auto: x, auto: y, !!2, !!3,
env: main: fun<main>,
}
result: 0
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