Basic Feature Complete

.gitignore

@@ -4,6 +4,7 @@
 *.dll
 *.so
 *.dylib
+stc
 
 # Test binary, build with `go test -c`
 *.test

main.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+var stack []float64
+
+func pop() float64 {
+	var x float64
+	if len(stack) > 0 {
+		x, stack = stack[len(stack)-1], stack[:len(stack)-1]
+	}
+	return x
+}
+
+func push(v float64) {
+	stack = append(stack, v)
+}
+
+func addOp(v1, v2 float64) float64 {
+	fmt.Printf("%f + %f = %f\n", v1, v2, (v1 + v2))
+	return v1 + v2
+}
+func subtractOp(v1, v2 float64) float64 {
+	fmt.Printf("%f - %f = %f\n", v1, v2, (v1 - v2))
+	return v1 - v2
+}
+func multiplyOp(v1, v2 float64) float64 {
+	fmt.Printf("%f * %f = %f\n", v1, v2, (v1 * v2))
+	return v1 * v2
+}
+func divideOp(v1, v2 float64) float64 {
+	fmt.Printf("%f / %f = %f\n", v1, v2, (v1 / v2))
+	return v1 / v2
+}
+
+func main() {
+	fmt.Println("vim-go")
+	var in string
+	reader := bufio.NewReader(os.Stdin)
+	for {
+		fmt.Print(stack)
+		fmt.Print(" > ")
+		in, _ = reader.ReadString('\n')
+		in = strings.TrimSpace(in)
+		switch in {
+		case ".":
+			break
+		case "+":
+			doStackOperation(addOp)
+		case "-":
+			doStackOperation(subtractOp)
+		case "*":
+			doStackOperation(multiplyOp)
+		case "/":
+			doStackOperation(divideOp)
+		default:
+			val, err := strconv.ParseFloat(in, 64)
+			if err != nil {
+				fmt.Println(err.Error())
+				fmt.Println("Valid inputs: +, -, /, *, <float>")
+				fmt.Println("'.' by itself to quit")
+			} else {
+				push(val)
+			}
+		}
+		if in == "." {
+			break
+		}
+	}
+}
+
+func doStackOperation(op func(float64, float64) float64) {
+	if len(stack) < 2 {
+		fmt.Println("Not enough on stack to add")
+		return
+	}
+	v1, v2 := pop(), pop()
+	push(op(v1, v2))
+}