// BuildBareFunc builds a function body into an image.
func BuildBareFunc(f string, rc io.ReadCloser) ([]byte, []*lex8.Error) {
fn, es := parse.BareFunc(f, rc)
if es != nil {
return nil, es
}
// resolving pass
log := lex8.NewErrorList()
rfunc := resolveFunc(log, fn)
if es := log.Errs(); es != nil {
return nil, es
}
// building pass
b := newBuilder()
fobj := buildFunc(b, rfunc)
if es := b.Errs(); es != nil {
return nil, es
}
ret, e := link8.LinkBareFunc(fobj)
if e != nil {
return nil, lex8.SingleErr(e)
}
return ret, nil
}
// BuildSingleFile builds a package named "main" from a single file.
func BuildSingleFile(f string, rc io.ReadCloser) ([]byte, []*lex8.Error) {
pinfo := build8.SimplePkg("_", f, rc)
compiled, es := Lang().Compile(pinfo)
if es != nil {
return nil, es
}
buf := new(bytes.Buffer)
e := link8.LinkMain(compiled.Lib(), buf, "main")
if e != nil {
return nil, lex8.SingleErr(e)
}
return buf.Bytes(), nil
}
// FileResult returns a parsing result.
func FileResult(f string, rc io.ReadCloser) (*Result, []*lex8.Error) {
p, rec := newParser(f, rc)
parsed := parseFile(p)
e := rc.Close()
if e != nil {
return nil, lex8.SingleErr(e)
}
if es := p.Errs(); es != nil {
return nil, es
}
res := &Result{
File: parsed,
Tokens: rec.Tokens(),
}
return res, nil
}
func (lang) Compile(pinfo *build8.PkgInfo) (
compiled build8.Linkable, es []*lex8.Error,
) {
asts, es := parsePkg(pinfo)
if es != nil {
return nil, es
}
// need to load these two builtin functions here
b := newBuilder(pinfo.Path)
initBuilder(b, pinfo.Import)
if es = b.Errs(); es != nil {
return nil, es
}
b.scope.Push() // package scope
defer b.scope.Pop()
for _, fileAST := range asts {
buildFile(b, fileAST)
}
if es = b.Errs(); es != nil {
return nil, es
}
addStart(b)
irLog := pinfo.CreateLog("ir")
ir.PrintPkg(irLog, b.p)
if e := irLog.Close(); e != nil {
return nil, lex8.SingleErr(e)
}
lib := ir.BuildPkg(b.p)
return &pkg{lib}, nil
}
func (bareFunc) Compile(pinfo *build8.PkgInfo) (
compiled build8.Linkable, es []*lex8.Error,
) {
b := newBuilder(pinfo.Path)
initBuilder(b, pinfo.Import)
if es = b.Errs(); es != nil {
return nil, es
}
if len(pinfo.Src) == 0 {
panic("no source file")
} else if len(pinfo.Src) > 1 {
e := fmt.Errorf("bare func %q has too many files", pinfo.Path)
return nil, lex8.SingleErr(e)
}
b.irLog = pinfo.CreateLog("ir")
defer b.irLog.Close()
for _, r := range pinfo.Src {
stmts, es := parse.Stmts(r.Path, r)
if es != nil {
return nil, es
}
lib := buildBareFunc(b, stmts)
if es = b.Errs(); es != nil {
return nil, es
}
return &pkg{lib}, nil
}
panic("unreachable")
}
func (b *Builder) build(p string) (*pkg, []*lex8.Error) {
ret := b.pkgs[p]
if ret == nil {
panic("build without prepare")
}
// already compiled
if ret.compiled != nil {
return ret, nil
}
if ret.buildStarted {
e := fmt.Errorf("package %q circular depends itself", p)
return ret, lex8.SingleErr(e)
}
ret.buildStarted = true
lang := ret.lang
for _, imp := range ret.imports {
built, es := b.build(imp.Path)
if es != nil {
return nil, es
}
imp.Compiled = built.compiled
}
// ready to build this one
if b.Verbose {
fmt.Println(p)
}
// compile now
pinfo := &PkgInfo{
Path: p,
Src: ret.srcMap(),
Import: ret.imports,
CreateLog: func(name string) io.WriteCloser {
return b.home.CreateLog(p, name)
},
}
compiled, es := lang.Compile(pinfo)
if es != nil {
return nil, es
}
ret.compiled = compiled
lib := ret.compiled.Lib() // the linkable lib
// a package with main entrance, build the bin
main := ret.compiled.Main()
if main != "" && lib.HasFunc(main) {
log := lex8.NewErrorList()
fout := b.home.CreateBin(p)
lex8.LogError(log, link8.LinkMain(lib, fout, main))
lex8.LogError(log, fout.Close())
if es := log.Errs(); es != nil {
return nil, es
}
}
return ret, nil
}
