WIP - add extractor, generate snippet_data

node_modules/babel-plugin-minify-simplify/lib/helpers.js

@@ -0,0 +1,56 @@
+"use strict";
+
+var VOID_0 = function VOID_0(t) {
+  return t.unaryExpression("void", t.numericLiteral(0), true);
+};
+
+// Types as Symbols - for comparing types
+var types = {};
+// This is a test key which is used to avoid Object.keys check
+// Object.keys() check is really expensive
+// https://gist.github.com/vigneshshanmugam/c766550ecd02292dcdfbf0bf013b9d3d
+var testKey = "Expression";
+
+var typeSymbols = function typeSymbols(t) {
+  // don't recompute
+  if (types[testKey] !== undefined) {
+    return types;
+  }
+  t.TYPES.forEach(function (type) {
+    types[type] = Symbol.for(type);
+  });
+  return types;
+};
+
+var isNodeOfType = function isNodeOfType(t, node, typeSymbol) {
+  return typeof typeSymbol !== "symbol" ? false : t["is" + Symbol.keyFor(typeSymbol)](node);
+};
+
+var isPatternMatchesPath = function isPatternMatchesPath(t) {
+  return function _isPatternMatchesPath(patternValue, inputPath) {
+    if (Array.isArray(patternValue)) {
+      for (var i = 0; i < patternValue.length; i++) {
+        if (_isPatternMatchesPath(patternValue[i], inputPath)) {
+          return true;
+        }
+      }
+      return false;
+    }
+    if (typeof patternValue === "function") {
+      return patternValue(inputPath);
+    }
+    if (isNodeOfType(t, inputPath.node, patternValue)) return true;
+    var evalResult = inputPath.evaluate();
+    if (!evalResult.confident || !inputPath.isPure()) return false;
+    return evalResult.value === patternValue;
+  };
+};
+
+module.exports = {
+  VOID_0,
+  // Types as Symbols
+  typeSymbols,
+  // This is required for resolving type aliases
+  isNodeOfType,
+  isPatternMatchesPath
+};