func (r *resolver) resolveMethod(s *scope, mth *ast.Method) error {
o := r.resolveName(s, mth.InTypeName)
if o == nil {
return fmt.Errorf("failed to resolve name %q", mth.InTypeName)
}
mth.InType = o.last()
o = r.resolveName(s, mth.OutTypeName)
if o == nil {
return fmt.Errorf("failed to resolve name %q", mth.OutTypeName)
}
mth.OutType = o.last()
return nil
}
func (p *parser) readMethodOptions(mth *ast.Method) *parseError {
if err := p.readToken("{"); err != nil {
return err
}
for !p.done {
tok := p.next()
switch tok.value {
case "}":
// End of Options
return nil
case "option":
//Handled below
default:
return p.errorf(`got %q, want "option" or "}"`, tok.value)
}
if err := p.readToken("("); err != nil {
return err
}
tok = p.next()
if tok.err != nil {
return tok.err
}
key := tok.value
if err := p.readToken(")"); err != nil {
return err
}
if err := p.readToken("="); err != nil {
return err
}
tok = p.next()
if tok.err != nil {
return tok.err
}
val := tok.value
if err := p.readToken(";"); err != nil {
return err
}
mth.Options = append(mth.Options, [2]string{key, val})
}
return nil
}
func (p *parser) readService(srv *ast.Service) *parseError {
if err := p.readToken("service"); err != nil {
return err
}
srv.Position = p.cur.astPosition()
tok := p.next()
if tok.err != nil {
return tok.err
}
srv.Name = tok.value // TODO: validate
if err := p.readToken("{"); err != nil {
return err
}
// Parse methods
for !p.done {
tok := p.next()
if tok.err != nil {
return tok.err
}
switch tok.value {
case "}":
// end of service
return nil
case "rpc":
// handled below
default:
return p.errorf(`got %q, want "rpc" or "}"`, tok.value)
}
tok = p.next()
if tok.err != nil {
return tok.err
}
mth := new(ast.Method)
srv.Methods = append(srv.Methods, mth)
mth.Position = tok.astPosition()
mth.Name = tok.value // TODO: validate
mth.Up = srv
if err := p.readToken("("); err != nil {
return err
}
tok = p.next()
if tok.err != nil {
return tok.err
}
mth.InTypeName = tok.value // TODO: validate
if err := p.readToken(")"); err != nil {
return err
}
if err := p.readToken("returns"); err != nil {
return err
}
if err := p.readToken("("); err != nil {
return err
}
tok = p.next()
if tok.err != nil {
return tok.err
}
mth.OutTypeName = tok.value // TODO: validate
if err := p.readToken(")"); err != nil {
return err
}
tok = p.next()
if tok.err != nil {
return tok.err
}
if tok.value == "{" {
p.back()
if err := p.readMethodOptions(mth); err != nil {
return err
}
} else if tok.value != ";" {
return p.errorf("unexpected %v while parsing Method", tok.value)
}
}
return p.errorf("unexpected EOF while parsing service")
}