Maybe valid code?

This commit is contained in:
bloeys
2022-10-27 03:33:54 +04:00
parent 80ce751286
commit ea05c65c93
3 changed files with 153 additions and 81 deletions

View File

@ -1,14 +1,28 @@
package cogo
// func Tick(c any) {
// }
type CoroutineFunc[InT, OutT any] func(c *Coroutine[InT, OutT]) (out OutT)
func Begin() {
type Coroutine[InT, OutT any] struct {
State int32
In InT
Func CoroutineFunc[InT, OutT]
}
func Yield[T any](out T) {
func (c *Coroutine[InT, OutT]) Begin() {
}
func End() {
func (c *Coroutine[InT, OutT]) Tick() (out OutT, done bool) {
if c.State == -1 {
return out, true
}
out = c.Func(c)
return out, c.State == -1
}
func (c *Coroutine[InT, OutT]) Yield(out OutT) {
}
func (c *Coroutine[InT, OutT]) End() {
}

View File

@ -11,6 +11,8 @@ import (
"golang.org/x/tools/go/packages"
)
const cogoSwitchLbl = "cogoSwitchLbl"
func printDebugInfo() {
fmt.Printf("Running inliner on '%s'\n", os.Getenv("GOFILE"))
@ -85,14 +87,15 @@ func (p *processor) processDeclNode(c *astutil.Cursor) bool {
return true
}
if !funcDeclCallsCogo(funcDecl) {
coroutineParamName := getCoroutineParamNameFromFuncDecl(funcDecl)
if coroutineParamName == "" || !funcDeclCallsCoroutineBegin(funcDecl, coroutineParamName) {
return false
}
beginBodyListIndex := -1
lastCaseEndBodyListIndex := -1
switchStmt := &ast.SwitchStmt{
Tag: ast.NewIdent("c.state"),
Tag: ast.NewIdent(coroutineParamName + ".State"),
Body: &ast.BlockStmt{
List: []ast.Stmt{},
},
@ -100,7 +103,7 @@ func (p *processor) processDeclNode(c *astutil.Cursor) bool {
for i, stmt := range funcDecl.Body.List {
var cogoFuncCallExpr *ast.SelectorExpr
var cogoFuncSelExpr *ast.SelectorExpr
// ifStmt, ifStmtOk := stmt.(*ast.IfStmt)
// if ifStmtOk {
@ -119,44 +122,89 @@ func (p *processor) processDeclNode(c *astutil.Cursor) bool {
continue
}
cogoFuncCallExpr, exprStmtOk = callExpr.Fun.(*ast.SelectorExpr)
cogoFuncSelExpr, exprStmtOk = callExpr.Fun.(*ast.SelectorExpr)
if !exprStmtOk {
continue
}
if !funcCallHasPkgName(cogoFuncCallExpr, "cogo") {
if !funcCallHasLhsName(cogoFuncSelExpr, coroutineParamName) {
continue
}
cogoFuncCallLineNum := p.fset.File(cogoFuncCallExpr.Pos()).Line(cogoFuncCallExpr.Pos())
fmt.Printf("Found: '%+v' at line %d\n", cogoFuncCallExpr, cogoFuncCallLineNum)
// cogoFuncCallLineNum := p.fset.File(cogoFuncSelExpr.Pos()).Line(cogoFuncSelExpr.Pos())
// Now that we found a call to cogo decide what to do
if cogoFuncCallExpr.Sel.Name == "Begin" {
if cogoFuncSelExpr.Sel.Name == "Begin" {
beginBodyListIndex = i
lastCaseEndBodyListIndex = i
continue
} else if cogoFuncCallExpr.Sel.Name == "Yield" || cogoFuncCallExpr.Sel.Name == "End" {
} else if cogoFuncSelExpr.Sel.Name == "Yield" {
// Add everything from the last begin/yield until this yield into a case
stmtsSinceLastCogo := funcDecl.Body.List[lastCaseEndBodyListIndex+1 : i]
switchStmt.Body.List = append(switchStmt.Body.List, getCaseWithStmts(
stmtsSinceLastCogo,
[]ast.Expr{ast.NewIdent(fmt.Sprint(cogoFuncCallLineNum))},
))
caseStmts := make([]ast.Stmt, 0, len(stmtsSinceLastCogo)+2)
caseStmts = append(caseStmts, stmtsSinceLastCogo...)
caseStmts = append(caseStmts,
&ast.IncDecStmt{
Tok: token.INC,
X: ast.NewIdent(coroutineParamName + ".State"),
},
&ast.ReturnStmt{
Results: callExpr.Args,
},
)
switchStmt.Body.List = append(switchStmt.Body.List,
getCaseWithStmts(
[]ast.Expr{ast.NewIdent(fmt.Sprint(len(switchStmt.Body.List)))},
caseStmts,
),
)
lastCaseEndBodyListIndex = i
} else if cogoFuncSelExpr.Sel.Name == "End" {
// Add everything from the last begin/yield until this yield into a case
stmtsSinceLastCogo := funcDecl.Body.List[lastCaseEndBodyListIndex+1 : i]
stmtsAfterEnd := funcDecl.Body.List[i+1:]
caseStmts := make([]ast.Stmt, 0, len(stmtsSinceLastCogo)+len(stmtsAfterEnd)+1)
caseStmts = append(caseStmts, stmtsSinceLastCogo...)
caseStmts = append(caseStmts,
&ast.AssignStmt{
Lhs: []ast.Expr{ast.NewIdent(coroutineParamName + ".State")},
Tok: token.ASSIGN,
Rhs: []ast.Expr{ast.NewIdent("-1")},
},
)
caseStmts = append(caseStmts, stmtsAfterEnd...)
switchStmt.Body.List = append(switchStmt.Body.List,
getCaseWithStmts(
[]ast.Expr{ast.NewIdent(fmt.Sprint(len(switchStmt.Body.List)))},
caseStmts,
),
)
lastCaseEndBodyListIndex = i
}
}
funcDecl.Body.List = funcDecl.Body.List[:beginBodyListIndex]
funcDecl.Body.List = append(funcDecl.Body.List, switchStmt)
funcDecl.Body.List = append(funcDecl.Body.List,
// &ast.LabeledStmt{
// Label: ast.NewIdent(cogoSwitchLbl),
// Stmt: switchStmt,
// },
switchStmt,
)
return true
}
func funcDeclCallsCogo(fd *ast.FuncDecl) bool {
func funcDeclCallsCoroutineBegin(fd *ast.FuncDecl, coroutineParamName string) bool {
if fd.Body == nil || len(fd.Body.List) == 0 {
return false
@ -180,35 +228,81 @@ func funcDeclCallsCogo(fd *ast.FuncDecl) bool {
continue
}
return funcCallHasPkgName(pkgFuncCallExpr, "cogo")
if funcCallHasLhsName(pkgFuncCallExpr, coroutineParamName) {
return true
}
}
return false
}
func funcCallHasPkgName(selExpr *ast.SelectorExpr, pkgName string) bool {
func getCoroutineParamNameFromFuncDecl(fd *ast.FuncDecl) string {
for _, p := range fd.Type.Params.List {
ptrExpr, ok := p.Type.(*ast.StarExpr)
if !ok {
continue
}
// indexList because coroutine type takes multiple generic parameters, creating an indexed list
indexListExpr, ok := ptrExpr.X.(*ast.IndexListExpr)
if !ok {
continue
}
selExpr, ok := indexListExpr.X.(*ast.SelectorExpr)
if !ok {
continue
}
if !selExprIs(selExpr, "cogo", "Coroutine") {
continue
}
return p.Names[0].Name
}
return ""
}
// func getIdentNameFromExprOrPanic(e ast.Expr) string {
// return e.(*ast.Ident).Name
// }
func funcCallHasLhsName(selExpr *ast.SelectorExpr, pkgName string) bool {
pkgIdent, ok := selExpr.X.(*ast.Ident)
return ok && pkgIdent.Name == pkgName
}
func filter[T any](arr []T, where func(x T) bool) []T {
func selExprIs(selExpr *ast.SelectorExpr, pkgName, typeName string) bool {
out := []T{}
for i := 0; i < len(arr); i++ {
if !where(arr[i]) {
continue
}
out = append(out, arr[i])
pkgIdentExpr, ok := selExpr.X.(*ast.Ident)
if !ok {
return false
}
return out
return pkgIdentExpr.Name == pkgName && selExpr.Sel.Name == typeName
}
func getCaseWithStmts(stmts []ast.Stmt, conditions []ast.Expr) *ast.CaseClause {
// func filter[T any](arr []T, where func(x T) bool) []T {
// out := []T{}
// for i := 0; i < len(arr); i++ {
// if !where(arr[i]) {
// continue
// }
// out = append(out, arr[i])
// }
// return out
// }
func getCaseWithStmts(caseConditions []ast.Expr, stmts []ast.Stmt) *ast.CaseClause {
return &ast.CaseClause{
List: conditions,
List: caseConditions,
Body: stmts,
}
}

54
main.go
View File

@ -9,51 +9,28 @@ import (
"github.com/bloeys/cogo/cogo"
)
type CoroutineFunc[InT, OutT any] func(c *Coroutine[InT, OutT]) (out OutT)
type Coroutine[InT, OutT any] struct {
State int32
In InT
Func CoroutineFunc[InT, OutT]
}
func (c *Coroutine[InT, OutT]) Tick() (out OutT, done bool) {
if c.State == -1 {
return out, true
}
out = c.Func(c)
return out, c.State == -1
}
// func (c *Coroutine[InT, OutT]) Yield(out OutT) {
// }
func (c *Coroutine[InT, OutT]) Break() {
}
func Wow() {
println("wow")
}
func test(c *Coroutine[int, int]) (out int) {
func test(c *cogo.Coroutine[int, int]) (out int) {
cogo.Begin()
c.Begin()
println("Tick 1")
cogo.Yield(1)
c.Yield(1)
println("Tick 2")
cogo.Yield(2)
c.Yield(2)
println("Tick 3")
cogo.Yield(3)
c.Yield(3)
println("Tick 4")
cogo.Yield(4)
c.Yield(4)
cogo.End()
println("Tick before end")
c.End()
// switch c.State {
// case 0:
@ -97,20 +74,7 @@ func test(c *Coroutine[int, int]) (out int) {
func main() {
x := 1
switch_start:
switch x {
case 1:
println(1)
x = 3
goto switch_start
case 2:
println(2)
case 3:
println(3)
}
return
c := &Coroutine[int, int]{
c := &cogo.Coroutine[int, int]{
Func: test,
In: 0,
}