/
types.go
66 lines (60 loc) · 1.08 KB
/
types.go
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package main
import (
"fmt"
"go/ast"
)
func TypeToSize(t *ast.Type) (out int) {
switch t.Form {
case ast.Tuple:
for _,o := range t.Params.Objects {
out += TypeToSize(o.Type)
}
return out
case ast.Basic:
switch t.N {
case ast.String:
return 8
case ast.Int:
return 4
default:
panic(fmt.Sprintf("I don't know size of basic type %s", t))
}
default:
panic(fmt.Sprintf("I don't know how to pop type %s", t.Form))
}
return
}
func SizeOnStack(t *ast.Type) (out int) {
out = TypeToSize(t)
if out & 3 != 0 {
return 4*(out/4 + 1)
}
return
}
var IntType *ast.Type = ast.NewType(ast.Basic)
var StringType *ast.Type = ast.NewType(ast.Basic)
func init() {
IntType.N = ast.Int
StringType.N = ast.String
}
func PrettyType(t *ast.Type) string {
switch t.Form {
case ast.Tuple:
out := "("
for _,o := range t.Params.Objects {
if out != "(" {
out += ", "
}
out += PrettyType(o.Type)
}
return out + ")"
case ast.Basic:
switch t.N {
case ast.String:
return "string"
case ast.Int:
return "int"
}
}
return fmt.Sprint("weird type: ",t)
}