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|
package main
import (
"io"
"reflect"
"text/template"
)
const (
fnErrSet = `if {{.Range}}[i], err = {{template "callFunc" .}}; handleNoOp(err) != nil {
return
}`
fnErrIncr = `var x {{asType .Kind}}
if x, err = {{template "callFunc" .}}; err != nil {
if err = handleNoOp(err);err != nil {
return
}
}
{{.Range}}[i] = x
`
simpleUnaryCallFunc = `{{template "symbol" .}}({{.Left}}[{{.Index0}}])`
)
type Map struct {
k reflect.Kind
Iter bool
Incr bool
Err bool
}
func (fn *Map) Name() string {
switch {
case fn.Iter && fn.Incr && fn.Err:
return "MapIterIncrErr"
case fn.Iter && fn.Incr && !fn.Err:
return "MapIterIncr"
case fn.Iter && !fn.Incr && fn.Err:
return "MapIterErr"
case fn.Iter && !fn.Incr && !fn.Err:
return "MapIter"
case !fn.Iter && fn.Incr && fn.Err:
return "MapIncrErr"
case !fn.Iter && fn.Incr && !fn.Err:
return "MapIncr"
case !fn.Iter && !fn.Incr && fn.Err:
return "MapErr"
default:
return "Map"
}
}
func (fn *Map) Arity() int { return 1 }
func (fn *Map) SymbolTemplate() string { return "fn" }
func (fn *Map) TypeClass() TypeClass { return nil }
func (fn *Map) IsFunc() bool { return true }
func (fn *Map) Kind() reflect.Kind { return fn.k }
func (fn *Map) Signature() *Signature {
var retErr bool
paramNames := []string{"fn", "a"}
paramTemplates := []*template.Template{unaryFuncType, sliceType}
if fn.Iter {
paramNames = append(paramNames, "ait")
paramTemplates = append(paramTemplates, iteratorType)
retErr = true
}
if fn.Err {
paramTemplates[0] = unaryFuncErrType
retErr = true
}
return &Signature{
Name: fn.Name(),
NameTemplate: typeAnnotatedName,
ParamNames: paramNames,
ParamTemplates: paramTemplates,
Kind: fn.Kind(),
Err: retErr,
}
}
func (fn *Map) WriteBody(w io.Writer) {
Range := "a"
Left := "a"
var T *template.Template
var IterName0 string
if fn.Iter {
T = template.Must(template.New(fn.Name()).Funcs(funcs).Parse(genericUnaryIterLoopRaw))
IterName0 = "ait"
} else {
T = template.Must(template.New(fn.Name()).Funcs(funcs).Parse(genericLoopRaw))
}
switch {
case fn.Incr && fn.Err:
template.Must(T.New("loopbody").Funcs(funcs).Parse(fnErrIncr))
case fn.Incr && !fn.Err:
template.Must(T.New("loopbody").Funcs(funcs).Parse(basicIncr))
case !fn.Incr && fn.Err:
template.Must(T.New("loopbody").Funcs(funcs).Parse(fnErrSet))
default:
template.Must(T.New("loopbody").Funcs(funcs).Parse(basicSet))
}
template.Must(T.New("callFunc").Funcs(funcs).Parse(simpleUnaryCallFunc))
template.Must(T.New("symbol").Funcs(funcs).Parse("fn"))
template.Must(T.New("opDo").Funcs(funcs).Parse(""))
template.Must(T.New("check").Funcs(funcs).Parse(""))
lb := LoopBody{
TypedOp: fn,
Range: Range,
Left: Left,
Index0: "i",
IterName0: IterName0,
}
T.Execute(w, lb)
}
func (fn *Map) Write(w io.Writer) {
sig := fn.Signature()
w.Write([]byte("func "))
sig.Write(w)
w.Write([]byte("{\n"))
fn.WriteBody(w)
w.Write([]byte("\nreturn \n"))
w.Write([]byte("}\n\n"))
}
func makeGenericMaps(incr bool) (retVal []*Map) {
for _, k := range allKinds {
if incr {
if !isAddable(k) {
continue
}
}
if isParameterized(k) {
continue
}
m := &Map{k: k}
if incr {
m.Incr = true
}
retVal = append(retVal, m)
}
return
}
func generateGenericMap(f io.Writer, ak Kinds) {
gen0 := makeGenericMaps(false)
for _, m := range gen0 {
m.Write(f)
m.Err = true
}
for _, m := range gen0 {
m.Write(f)
m.Err = false
m.Iter = true
}
for _, m := range gen0 {
m.Write(f)
m.Err = true
}
for _, m := range gen0 {
m.Write(f)
}
gen1 := makeGenericMaps(true)
for _, m := range gen1 {
m.Write(f)
m.Err = true
}
for _, m := range gen1 {
m.Write(f)
m.Err = false
m.Iter = true
}
for _, m := range gen1 {
m.Write(f)
m.Err = true
}
for _, m := range gen1 {
m.Write(f)
}
}
|
