support input

#7
async not supported yet

DNCL3.js

@@ -1,7 +1,8 @@
 import { parseModule } from "https://code4fukui.github.io/acorn-es/parseModule.js";
 
 const reserved = [
-  "print", "input",
+  "print",
+  //"input",
   "if", "then", "else",
   "while", "do", "until", "for", "to", "step", "break",
   "function", "return",
@@ -471,7 +472,7 @@ export class DNCL3 {
           arguments: res,
         },
       });
-    } else if (token.type == "var") {
+    } else if (token.type == "var" || token.type == "input") {
       const chk = this.getToken();
       if (chk.type == "(") { // function
         const params = [];
@@ -1001,6 +1002,17 @@ export class DNCL3 {
       }
     } else if (ast.type == "CallExpression") {
       const name = ast.callee.name;
+      if (name == "input") {
+        if (ast.arguments.length > 1) {
+          throw new Error("引数の数が合っていません");
+        }
+        const q = ast.arguments.length ? this.calcExpression(ast.arguments[0]) : "入力してください";
+        const s = prompt(q);
+        if (s == null) return "";
+        const f = parseFloat(s);
+        if (!isNaN(f) && f.toString() == s) return f;
+        return s;
+      }
       if (this.vars[name] === undefined) {
         throw new Error("定義されていない関数 " + name + " が使われました");
       }

README.md

@@ -10,7 +10,7 @@ deno run -A DNCL3.example.js bmi
 - ブラウザで動作するテスト環境 [dncl2js](https://code4fukui.github.io/DNCL3/dncl2js.html)
 
 ※ TODO: 下記は未実装です
-- [二次元以上の配列](https://github.com/code4fukui/DNCL3/issues/2) / [配列のすべてを初期化](https://github.com/code4fukui/DNCL3/issues/3) / [input](https://github.com/code4fukui/DNCL3/issues/7) / [変数のスコープ](https://github.com/code4fukui/DNCL3/issues/13)
+- [二次元以上の配列](https://github.com/code4fukui/DNCL3/issues/2) / [配列のすべてを初期化](https://github.com/code4fukui/DNCL3/issues/3) / [変数のスコープ](https://github.com/code4fukui/DNCL3/issues/13)
 
 ## 1 変数と値
 
@@ -67,8 +67,8 @@ print s[0],s[2] # A C と表示される
 
 外部から入力された値を代入するために，次のように記述することができます。
 
-- 例: input x
-- 例: input "0から100までの好きな数を入力してください", x
+- 例: x = input()
+- 例: x = input("0から100までの好きな数を入力してください")
 
 ## 4 演算
 

dncl2js.html

@@ -31,7 +31,6 @@ <h1>DNCL3 → AST → like JavaScript → output</h1>
 import escodegen from "https://code4fukui.github.io/escodegen/escodegen.js";
 import { monaco } from "https://code4fukui.github.io/monaco-editor/monaco.js";
 
-
 export const makeEditor = (div, language) => {
   const editor = monaco.editor.create(div, {
     language,
@@ -74,6 +73,7 @@ <h1>DNCL3 → AST → like JavaScript → output</h1>
   }
 };
 
+let bkval = null;
 const onchange = () => {
   const src = prog.getValue();
   try {
@@ -93,15 +93,14 @@ <h1>DNCL3 → AST → like JavaScript → output</h1>
     run.setValue(e.toString());
     prog2.setValue("");
   }
+  bkval = src;
 };
 
 //prog.onDidChangeModelContent = onchange; // なぜか初回のみ
-let bkval = null;
 setInterval(() => {
   const txt = prog.getValue();
   if (bkval == txt) return;
   onchange();
-  bkval = txt;
 }, 500);
 
 //const fn = "bmi";
@@ -114,7 +113,8 @@ <h1>DNCL3 → AST → like JavaScript → output</h1>
 //const fn = "varja";
 //const fn = "funcja";
 //const fn = "dowhile";
-const fn = "comment";
+//const fn = "comment";
+const fn = "input";
 
 const fn0 = location.hash.substring(1) || fn;
 const firstprog = await (await fetch("examples/" + fn0 + ".dncl")).text();

examples/input.dncl

@@ -0,0 +1,4 @@
+x = input()
+print "input", x
+x = input("二乗します")
+print x * x