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fix interpreter's handling of optional else of if statement (#323)

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This commit is contained in:
Jeremy G. Siek
2021-03-02 13:04:49 -05:00
committed by GitHub
parent b2c9203143
commit 5457916abb
3 changed files with 24 additions and 6 deletions
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executable_semantics/testdata/if2.golden
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+20 -2
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@@ -136,8 +136,26 @@ env: main: fun<main>,
else
<1>(false,) --->
{
stack: main{<-1> :: return 0;<-1>} :: top{}
stack: main{return 0;<-1>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step stmt --->
--- step stmt return 0; --->
{
stack: main{0<-1> :: return 0;<0>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- step exp 0 --->
{
stack: main{0<-1> :: return 0;<0>} :: top{}
heap: fun<main>,
env: main: fun<main>,
}
--- handle value 0 with return 0;<1>(0,) --->
{
stack: top{0<-1>}
heap: fun<main>,
env: main: fun<main>,
}
result: 0