// HookBuiltin uses the builtin package that provides neccessary
// builtin functions for IR generation
func (p *Pkg) HookBuiltin(pkg *link8.Pkg) error {
var err error
se := func(e error) {
if err != nil {
err = e
}
}
o := func(f string) *FuncSym {
sym := pkg.SymbolByName(f)
if sym == nil {
se(fmt.Errorf("%s missing in builtin", f))
} else if sym.Type != link8.SymFunc {
se(fmt.Errorf("%s is not a function", f))
}
return &FuncSym{pkg: pkg.Path(), name: f}
}
p.g.memCopy = o("MemCopy")
p.g.memClear = o("MemClear")
return err
}
func declareBuiltin(b *builder, builtin *link8.Pkg) {
path := builtin.Path()
e := b.p.HookBuiltin(builtin)
if e != nil {
b.Errorf(nil, e.Error())
return
}
o := func(name, as string, t *types.Func) ir.Ref {
sym := builtin.SymbolByName(name)
if sym == nil {
b.Errorf(nil, "builtin symbol %s missing", name)
return nil
} else if sym.Type != link8.SymFunc {
b.Errorf(nil, "builtin symbol %s is not a function", name)
return nil
}
ref := ir.NewFuncSym(path, name, makeFuncSig(t))
obj := &objFunc{name: as, ref: newRef(t, ref)}
s := sym8.Make(b.path, as, tast.SymFunc, obj, t, nil)
pre := b.scope.Declare(s)
if pre != nil {
b.Errorf(nil, "builtin symbol %s declare failed", name)
return nil
}
return ref
}
// TODO: export these as generic function pointer symbols, and convert
// them into G functions in g files, rather than inside here in the
// compiler.
o("PrintInt32", "printInt", types.NewVoidFunc(types.Int))
o("PrintUint32", "printUint", types.NewVoidFunc(types.Uint))
o("PrintChar", "printChar", types.NewVoidFunc(types.Int8))
b.panicFunc = o("Panic", "panic", types.VoidFunc)
bi := func(name string) {
t := types.NewBuiltInFunc(name)
obj := &objFunc{name: name, ref: newRef(t, nil)}
s := sym8.Make(b.path, name, tast.SymFunc, obj, t, nil)
pre := b.scope.Declare(s)
if pre != nil {
b.Errorf(nil, "builtin symbol %s declare failed", name)
}
}
bi("len")
bi("make")
c := func(name string, r *ref) {
// TODO: declare these as typed consts
obj := &objConst{name, r}
s := sym8.Make(b.path, name, tast.SymConst, obj, r.Type(), nil)
pre := b.scope.Declare(s)
if pre != nil {
b.Errorf(nil, "builtin symbol %s declare failed", name)
}
}
c("true", refTrue)
c("false", refFalse)
c("nil", refNil)
t := func(name string, t types.T) {
s := sym8.Make(b.path, name, tast.SymType, nil, &types.Type{t}, nil)
pre := b.scope.Declare(s)
if pre != nil {
b.Errorf(nil, "builtin symbol %s declare failed", name)
}
}
t("int", types.Int)
t("uint", types.Uint)
t("int32", types.Int)
t("uint32", types.Uint)
t("int8", types.Int8)
t("uint8", types.Uint8)
t("char", types.Int8)
t("byte", types.Uint8)
t("bool", types.Bool)
t("float", types.Float32)
t("string", types.String)
// t("ptr", &types.Pointer{types.Uint8})
// t("float32", types.Float32)
// t("string", types.String)
}