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carbon-lang/executable_semantics/testdata/continue1.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 = 2;
while ((! (x == 0)))
{
x = (x - 1);
continue;
x = (x + 1);
}
return x;
}
********** type checking **********
--- step exp Int --->
--- step exp Int --->
--- step exp auto --->
********** type checking complete **********
fn main () -> Int {
var auto: x = 2;
while ((! (x == 0)))
{
x = (x - 1);
continue;
x = (x + 1);
}
return x;
}
********** 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 = 2; ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var auto: x = 2; ... --->
{
stack: main{var auto: x = 2;<-1> :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt var auto: x = 2; --->
{
stack: main{2<-1> :: var auto: x = 2;<0> :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp 2 --->
{
stack: main{2<-1> :: var auto: x = 2;<0> :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value 2 with var auto: x = 2;<1>(2,) --->
{
stack: main{auto: x<-1> :: var auto: x = 2;<1>(2,) :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp auto: x --->
{
stack: main{auto<-1> :: auto: x<0> :: var auto: x = 2;<1>(2,) :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp auto --->
{
stack: main{auto<-1> :: auto: x<0> :: var auto: x = 2;<1>(2,) :: while ((! (x == 0)))
... ... <-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 = 2;<1>(2,) :: while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value auto: x with var auto: x = 2;<2>(2,auto: x,) --->
pattern_match(auto: x, 2)
{
stack: main{while ((! (x == 0)))
... ... <-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step stmt while ((! (x == 0)))
... ... --->
{
stack: main{while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step stmt while ((! (x == 0)))
... --->
{
stack: main{(! (x == 0))<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp (! (x == 0)) --->
{
stack: main{(x == 0)<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp (x == 0) --->
{
stack: main{x<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp x --->
{
stack: main{2<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value 2 with (x == 0)<1>(2,) --->
{
stack: main{0<-1> :: (x == 0)<1>(2,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp 0 --->
{
stack: main{0<-1> :: (x == 0)<1>(2,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value 0 with (x == 0)<2>(2,0,) --->
{
stack: main{false<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value false with (! (x == 0))<1>(false,) --->
{
stack: main{true<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value true with while ((! (x == 0)))
... <1>(true,) --->
{
stack: main{{
...
}
<-1> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step stmt {
...
}
--->
{
stack: main{x = (x - 1); ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step stmt x = (x - 1); ... --->
{
stack: main{x = (x - 1);<-1> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step stmt x = (x - 1); --->
{
stack: main{x<-1> :: x = (x - 1);<0> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step lvalue x --->
{
stack: main{ptr<1><-1> :: x = (x - 1);<0> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value ptr<1> with x = (x - 1);<1>(ptr<1>,) --->
{
stack: main{(x - 1)<-1> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp (x - 1) --->
{
stack: main{x<-1> :: (x - 1)<0> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp x --->
{
stack: main{2<-1> :: (x - 1)<0> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value 2 with (x - 1)<1>(2,) --->
{
stack: main{1<-1> :: (x - 1)<1>(2,) :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- step exp 1 --->
{
stack: main{1<-1> :: (x - 1)<1>(2,) :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value 1 with (x - 1)<2>(2,1,) --->
{
stack: main{1<-1> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 2,
env: x: 2, main: fun<main>,
}
--- handle value 1 with x = (x - 1);<2>(ptr<1>,1,) --->
{
stack: main{continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt continue; ... --->
{
stack: main{continue;<-1> :: x = (x + 1);<-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt continue; --->
{
stack: main{while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt while ((! (x == 0)))
... --->
{
stack: main{(! (x == 0))<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp (! (x == 0)) --->
{
stack: main{(x == 0)<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp (x == 0) --->
{
stack: main{x<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp x --->
{
stack: main{1<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value 1 with (x == 0)<1>(1,) --->
{
stack: main{0<-1> :: (x == 0)<1>(1,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp 0 --->
{
stack: main{0<-1> :: (x == 0)<1>(1,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value 0 with (x == 0)<2>(1,0,) --->
{
stack: main{false<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value false with (! (x == 0))<1>(false,) --->
{
stack: main{true<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value true with while ((! (x == 0)))
... <1>(true,) --->
{
stack: main{{
...
}
<-1> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt {
...
}
--->
{
stack: main{x = (x - 1); ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt x = (x - 1); ... --->
{
stack: main{x = (x - 1);<-1> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step stmt x = (x - 1); --->
{
stack: main{x<-1> :: x = (x - 1);<0> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step lvalue x --->
{
stack: main{ptr<1><-1> :: x = (x - 1);<0> :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value ptr<1> with x = (x - 1);<1>(ptr<1>,) --->
{
stack: main{(x - 1)<-1> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp (x - 1) --->
{
stack: main{x<-1> :: (x - 1)<0> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp x --->
{
stack: main{1<-1> :: (x - 1)<0> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value 1 with (x - 1)<1>(1,) --->
{
stack: main{1<-1> :: (x - 1)<1>(1,) :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- step exp 1 --->
{
stack: main{1<-1> :: (x - 1)<1>(1,) :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value 1 with (x - 1)<2>(1,1,) --->
{
stack: main{0<-1> :: x = (x - 1);<1>(ptr<1>,) :: continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 1,
env: x: 1, main: fun<main>,
}
--- handle value 0 with x = (x - 1);<2>(ptr<1>,0,) --->
{
stack: main{continue; ... <-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt continue; ... --->
{
stack: main{continue;<-1> :: x = (x + 1);<-1> :: {
...
}
<0> :: while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt continue; --->
{
stack: main{while ((! (x == 0)))
... <-1> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt while ((! (x == 0)))
... --->
{
stack: main{(! (x == 0))<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp (! (x == 0)) --->
{
stack: main{(x == 0)<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp (x == 0) --->
{
stack: main{x<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp x --->
{
stack: main{0<-1> :: (x == 0)<0> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value 0 with (x == 0)<1>(0,) --->
{
stack: main{0<-1> :: (x == 0)<1>(0,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp 0 --->
{
stack: main{0<-1> :: (x == 0)<1>(0,) :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value 0 with (x == 0)<2>(0,0,) --->
{
stack: main{true<-1> :: (! (x == 0))<0> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value true with (! (x == 0))<1>(true,) --->
{
stack: main{false<-1> :: while ((! (x == 0)))
... <0> :: return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value false with while ((! (x == 0)))
... <1>(false,) --->
{
stack: main{return x;<-1>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step stmt return x; --->
{
stack: main{x<-1> :: return x;<0>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- step exp x --->
{
stack: main{0<-1> :: return x;<0>} :: top{}
heap: fun<main>, 0,
env: x: 0, main: fun<main>,
}
--- handle value 0 with return x;<1>(0,) --->
{
stack: top{0<-1>}
heap: fun<main>, !!0,
env: main: fun<main>,
}
result: 0
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