mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jeremy G. Siek
ced98ef021
* global variables * implemented type checking of global variable, added test case * added a comment * improvements based on Dave's suggestions * improvements based on Jon's suggestions * added test cases about global variable ordering
78 lines
1.6 KiB
Plaintext
78 lines
1.6 KiB
Plaintext
********** source program **********
|
|
var Int : zero = 0
|
|
fn main () -> Int {
|
|
return zero;
|
|
|
|
}
|
|
********** type checking **********
|
|
--- step exp Int --->
|
|
--- step exp Int --->
|
|
--- step exp Int --->
|
|
--- step exp Int --->
|
|
|
|
********** type checking complete **********
|
|
var Int : zero = 0
|
|
fn main () -> Int {
|
|
return zero;
|
|
}
|
|
********** starting execution **********
|
|
********** initializing globals **********
|
|
--- step exp 0 --->
|
|
--- step exp () --->
|
|
********** calling main function **********
|
|
{
|
|
stack: top{main()<-1>}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- step exp main() --->
|
|
{
|
|
stack: top{main<-1> :: main()<0>}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- step exp main --->
|
|
{
|
|
stack: top{fun<main><-1> :: main()<0>}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- handle value fun<main> with main()<1>(fun<main>,) --->
|
|
{
|
|
stack: top{()<-1> :: main()<1>(fun<main>,)}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- step exp () --->
|
|
{
|
|
stack: top{()<-1> :: main()<1>(fun<main>,)}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- handle value () with main()<2>(fun<main>,(),) --->
|
|
pattern_match((), ())
|
|
{
|
|
stack: main{return zero;<-1>} :: top{}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- step stmt return zero; --->
|
|
{
|
|
stack: main{zero<-1> :: return zero;<0>} :: top{}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- step exp zero --->
|
|
{
|
|
stack: main{0<-1> :: return zero;<0>} :: top{}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
--- handle value 0 with return zero;<1>(0,) --->
|
|
{
|
|
stack: top{0<-1>}
|
|
heap: 0, fun<main>,
|
|
env: main: fun<main>, zero: 0,
|
|
}
|
|
result: 0
|