1 files changed, 72 insertions, 0 deletions
diff --git a/repl.mu b/repl.mu
new file mode 100644
index 00000000..0099d2cc
--- /dev/null
+++ b/repl.mu
@@ -0,0 +1,72 @@
+# interactive prompt for mu
+
+recipe main [
+  default-space:address:array:location <- new location:type, 30:literal
+  switch-to-display
+  msg:address:array:character <- new [ready! type in an instruction, then hit enter. ctrl-d exits.
+]
+  0:literal/real-screen <- print-string 0:literal/real-screen, msg:address:array:character
+  {
+    inst:address:array:character, 0:literal/real-keyboard, 0:literal/real-screen <- read-instruction 0:literal/real-keyboard, 0:literal/real-screen
+    break-unless inst:address:array:character
+    0:literal/real-screen <- print-string 0:literal/real-screen, inst:address:array:character
+    loop
+  }
+  wait-for-key-from-keyboard
+  return-to-console
+]
+
+# basic keyboard input; just text and enter
+scenario read-instruction1 [
+  assume-screen 30:literal/width, 5:literal/height
+  assume-keyboard [x <- copy y
+]
+  run [
+    1:address:array:character <- read-instruction keyboard:address, screen:address
+    2:address:array:character <- new [=> ]
+    print-string screen:address, 2:address:array:character
+    print-string screen:address, 1:address:array:character
+  ]
+  screen-should-contain [
+    .x <- copy y                   .
+    .=> x <- copy y                .
+    .                              .
+  ]
+  screen-should-contain-in-color 7:literal/white, [
+    .x <- copy y                   .
+    .=> x <- copy y                .
+    .                              .
+  ]
+]
+
+recipe read-instruction [
+  default-space:address:array:location <- new location:type, 60:literal
+  k:address:keyboard <- next-ingredient
+  x:address:screen <- next-ingredient
+  result:address:buffer <- init-buffer 10:literal  # string to maybe add to
+  {
+    c:character, k:address:keyboard <- wait-for-key k:address:keyboard
+#?     $print c:character, [ 
+#? ] #? 1
+    print-character x:address:screen, c:character
+    # quit?
+    {
+      ctrl-d?:boolean <- equal c:character, 4:literal/ctrl-d/eof
+      break-unless ctrl-d?:boolean
+      reply 0:literal, k:address:keyboard/same-as-ingredient:0, x:address:screen/same-as-ingredient:1
+    }
+    {
+      null?:boolean <- equal c:character, 0:literal/null
+      break-unless null?:boolean
+      reply 0:literal, k:address:keyboard/same-as-ingredient:0, x:address:screen/same-as-ingredient:1
+    }
+    # append
+    result:address:buffer <- buffer-append result:address:buffer, c:character
+    # done with this instruction?
+    done?:boolean <- equal c:character, 10:literal/newline
+    break-if done?:boolean
+    loop
+  }
+  result2:address:array:character <- buffer-to-array result:address:buffer
+  reply result2:address:array:character
+]