48 lines
1,017 B
Go
48 lines
1,017 B
Go
package runner
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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lerrors "github.com/AYM1607/crafting-interpreters/golox/internal/errors"
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"github.com/AYM1607/crafting-interpreters/golox/internal/scanner"
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)
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var ErrInvalidScriptFile = errors.New("could not read script file")
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var ErrScriptNotRunnable = errors.New("could not run script")
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func RunPrompt() {
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s := bufio.NewScanner(os.Stdin)
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fmt.Print("> ")
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for s.Scan() {
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line := s.Text()
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Run(line)
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// TODO: Understand the implications of this. The book implies that it's
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// to allow the users to keep issuing commands even if they make a mistake.
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lerrors.HadError = false
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fmt.Print("> ")
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}
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}
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func RunFile(path string) error {
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fBytes, err := os.ReadFile(path)
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if err != nil {
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return errors.Join(ErrInvalidScriptFile, err)
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}
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Run(string(fBytes))
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if lerrors.HadError {
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return ErrScriptNotRunnable
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}
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return nil
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}
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func Run(source string) {
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s := scanner.NewScanner(source)
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tokens := s.ScanTokens()
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for _, t := range tokens {
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fmt.Println(t)
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}
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}
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