54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
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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stack := Stack{values: []int{}}
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dict := Dictionary{}
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b := &Builtins{}
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dict.AddWord("+", b.Add(&stack), "")
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dict.AddWord("-", b.Sub(&stack), "")
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dict.AddWord("*", b.Mul(&stack), "")
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dict.AddWord("/", b.Div(&stack), "")
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dict.AddWord(".", b.Print(&stack), "")
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dict.AddWord("DUP", b.Dup(&stack), "")
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dict.AddWord("SWAP", b.Swap(&stack), "")
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dict.AddWord("OVER", b.Over(&stack), "")
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dict.AddWord("DROP", b.Drop(&stack), "")
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dict.AddWord("ROT", b.Rot(&stack), "")
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dict.AddWord("WORDS", b.Words(dict), "")
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dict.AddWord(".S", b.Debug(&stack), "")
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dict.AddWord("CR", b.CR(), "")
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c := Context{
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Dictionary: dict,
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Stack: &stack,
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}
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reader := bufio.NewReader(os.Stdin)
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fmt.Print("prosper")
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// read loop
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for {
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fmt.Print("\n> ")
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line, err := reader.ReadString('\n')
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if err != nil {
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fmt.Println(err.Error())
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os.Exit(1)
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}
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line = strings.TrimSpace(line)
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err = c.Eval(line + " ") // append a space to make sure we always close out our parse loop
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if err != nil {
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fmt.Printf("error in evaluation: %v\n", err)
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}
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fmt.Print("ok")
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}
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}
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