64 lines
976 B
Go
64 lines
976 B
Go
package main
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import (
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"bufio"
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"fmt"
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"io/ioutil"
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"os"
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"git.bonsai.cool/kayprish/pj1/pj1-go/lexer"
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"git.bonsai.cool/kayprish/pj1/pj1-go/util"
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)
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func main() {
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if len(os.Args) > 2 {
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fmt.Println("Usage: pj1-go [script]")
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os.Exit(64)
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} else if len(os.Args) == 2 {
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runFile(os.Args[0])
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} else {
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runPrompt()
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}
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}
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func runFile(path string) {
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bytes, err := ioutil.ReadFile(path)
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if err != nil {
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fmt.Println(err)
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return
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}
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run(string(bytes[:]))
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if util.HadError {
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os.Exit(65)
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}
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}
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func runPrompt() {
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scanner := bufio.NewScanner(os.Stdin)
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for {
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fmt.Print("> ")
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if !scanner.Scan() {
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break
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}
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line := scanner.Text()
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fmt.Println(line)
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run(line)
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util.HadError = false
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}
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if err := scanner.Err(); err != nil {
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fmt.Fprintln(os.Stderr, "reading standard input:", err)
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}
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}
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func run(source string) {
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l := lexer.NewLexer(source)
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l.ScanTokens()
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var tokens []lexer.Token = l.Tokens
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for _, token := range tokens {
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fmt.Println(token)
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}
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}
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