Added step0_repl.ts

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/deno-mal.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/.tmp" />
+      <excludeFolder url="file://$MODULE_DIR$/temp" />
+      <excludeFolder url="file://$MODULE_DIR$/tmp" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/deno-mal.iml" filepath="$PROJECT_DIR$/.idea/deno-mal.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Makefile

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+step0_repl.ts:

run

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+#!/usr/bin/env nix-shell
+#! nix-shell -i bash --pure
+#! nix-shell -p bash deno
+exec deno run -A $(dirname $0)/${STEP:-stepA_mal}.ts "${@}"

step0_repl.ts

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+function read(source: string): string {
+    return source;
+}
+
+function eval_(ast: string): string {
+    return ast;
+}
+
+function print(form: string): string {
+    return form
+}
+
+function rep(source: string): string{
+    return print(eval_(read( source)))
+}
+
+function* readUserInputs(): Generator<string>{
+    while(true){
+        const u =  prompt("user> ")
+        if(u === null){
+            return
+        }
+        yield u
+    }
+}
+
+
+function main(): void {
+     for(const userInput of readUserInputs()){
+         rep(userInput);
+     }
+
+
+}
+
+main();