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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bufio"
"exp/eval"
"flag"
"go/parser"
"go/scanner"
"go/token"
"io/ioutil"
"os"
)
var fset = token.NewFileSet()
var filename = flag.String("f", "", "file to run")
func main() {
flag.Parse()
w := eval.NewWorld()
if *filename != "" {
data, err := ioutil.ReadFile(*filename)
if err != nil {
println(err.String())
os.Exit(1)
}
file, err := parser.ParseFile(fset, *filename, data, 0)
if err != nil {
println(err.String())
os.Exit(1)
}
code, err := w.CompileDeclList(fset, file.Decls)
if err != nil {
if list, ok := err.(scanner.ErrorList); ok {
for _, e := range list {
println(e.String())
}
} else {
println(err.String())
}
os.Exit(1)
}
_, err = code.Run()
if err != nil {
println(err.String())
os.Exit(1)
}
code, err = w.Compile(fset, "init()")
if code != nil {
_, err := code.Run()
if err != nil {
println(err.String())
os.Exit(1)
}
}
code, err = w.Compile(fset, "main()")
if err != nil {
println(err.String())
os.Exit(1)
}
_, err = code.Run()
if err != nil {
println(err.String())
os.Exit(1)
}
os.Exit(0)
}
r := bufio.NewReader(os.Stdin)
for {
print("; ")
line, err := r.ReadString('\n')
if err != nil {
break
}
code, err := w.Compile(fset, line)
if err != nil {
println(err.String())
continue
}
v, err := code.Run()
if err != nil {
println(err.String())
continue
}
if v != nil {
println(v.String())
}
}
}
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