86 lines
1.2 KiB
Go
86 lines
1.2 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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)
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type Glox struct {
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Interpreter *Interpreter
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}
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func main() {
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glox := &Glox{newInterpreter()}
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switch len(os.Args) {
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case 1:
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glox.runPrompt()
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case 2:
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glox.runFile(os.Args[1])
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default:
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println("Usage: glox [file]")
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os.Exit(1)
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}
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}
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func (gl *Glox) runPrompt() {
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scanner := bufio.NewScanner(os.Stdin)
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scanner.Split(bufio.ScanLines)
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doRun := func(line []byte) {
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defer func() {
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if err := recover(); err != nil {
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log.Println(err)
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}
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}()
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gl.run(line)
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}
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for {
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print("> ")
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if !scanner.Scan() {
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break
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}
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doRun(scanner.Bytes())
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}
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}
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func (gl *Glox) runFile(path string) {
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file, err := os.ReadFile(path)
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if err != nil {
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log.Fatal(err)
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}
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gl.run(file)
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}
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func (gl *Glox) run(source []byte) {
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tokens, err := newScanner(source).scan()
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if err != nil {
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panic(err)
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}
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stmts, parseErrs := newParser(tokens).parse()
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if parseErrs != nil {
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panic(parseErrs)
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}
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fmt.Println(AstStringer{stmts: stmts})
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resolveErrs := newResolver(gl.Interpreter).resolveStmts(stmts...)
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if resolveErrs != nil {
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panic(resolveErrs)
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}
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interpreterErrs := gl.Interpreter.interpret(stmts)
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if interpreterErrs != nil {
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panic(interpreterErrs)
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}
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}
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