42 lines
708 B
Go
42 lines
708 B
Go
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package main
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import (
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"bufio"
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"fmt"
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"io"
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"monkey/internal/lexer"
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"monkey/internal/token"
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"os"
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"os/user"
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)
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const prompt = ">> "
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func main() {
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user, err := user.Current()
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if err != nil {
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panic(err)
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}
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fmt.Printf("Hello %s! This is the Monkey programming language!\n",
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user.Username)
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fmt.Printf("Feel free to type in commands\n")
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start(os.Stdin, os.Stdout)
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}
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func start(in io.Reader, out io.Writer) {
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scanner := bufio.NewScanner(in)
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for {
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fmt.Fprintf(out, prompt)
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scanned := scanner.Scan()
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if !scanned {
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return
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}
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line := scanner.Text()
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l := lexer.New(line)
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for tok := l.NextToken(); tok.Type != token.EOF; tok = l.NextToken() {
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fmt.Fprintf(out, "%+v\n", tok)
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}
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}
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}
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