func (a *ast) Execute(args []string) error {
if len(args) != 1 {
return fmt.Errorf("expected an input file")
}
f, err := os.Open(args[0])
if err != nil {
return err
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
return err
}
p := parser.New()
syms, _, err := p.Parse(args[0], b)
if err != nil {
if a.AllErrors {
scanner.PrintError(stdout, err)
}
return err
}
out := stdout
if a.Output != "" {
outf, err := os.Open(a.Output)
if err != nil {
return err
}
defer outf.Close()
out = outf
}
for _, sym := range syms {
fmt.Fprintln(out, sym)
}
return nil
}
// Compile takes a module identifier and a reader, and compiles its source date
// to an in-memory representation of agora bytecode, ready to be executed.
// If an error is encountered, it is returned as second value, otherwise it is
// nil.
func (c *Compiler) Compile(id string, r io.Reader) (*bytecode.File, error) {
b, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
p := parser.New()
syms, scps, err := p.Parse(id, b)
if err != nil {
return nil, err
}
e := new(emitter.Emitter)
return e.Emit(id, syms, scps)
}