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Initial commit
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commit
3998ef0a3c
47
main.go
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47
main.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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"os"
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"strings"
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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: lox [script]")
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os.Exit(1)
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} else if len(os.Args) == 2 {
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parseFile(os.Args[1])
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} else {
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parsePrompt()
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}
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}
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func parseFile(path string) {
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file, err := os.ReadFile(path)
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if err != nil {
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fmt.Println("Could not open file")
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os.Exit(1)
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}
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scanner := NewScanner()
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scanner.Parse(string(file))
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}
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func parsePrompt() {
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reader := bufio.NewReader(os.Stdin)
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scanner := NewScanner()
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for {
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fmt.Print("> ")
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text, _ := reader.ReadString('\n')
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text = strings.TrimSpace(text)
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if text == "exit" {
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return
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}
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scanner.Parse(text)
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}
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}
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21
scanner.go
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21
scanner.go
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package main
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import (
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"fmt"
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)
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type Scanner struct {
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tokens []Token
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}
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func (s *Scanner) GetTokens() []Token {
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return s.tokens
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}
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func (s *Scanner) Parse(source string) {
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fmt.Println(source)
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}
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func NewScanner() *Scanner {
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return &Scanner{}
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}
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1
scripts/example.lox
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1
scripts/example.lox
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print "Hello, World!";
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