1 files changed, 39 insertions, 0 deletions
diff --git a/node_modules/babel-plugin-minify-simplify/lib/conditional-expression.js b/node_modules/babel-plugin-minify-simplify/lib/conditional-expression.js
new file mode 100644
index 00000000..9640e8c8
--- /dev/null
+++ b/node_modules/babel-plugin-minify-simplify/lib/conditional-expression.js
@@ -0,0 +1,39 @@
+"use strict";
+
+const h = require("./helpers");
+
+const PatternMatch = require("./pattern-match");
+
+module.exports = t => {
+  // small abstractions
+  const not = node => t.unaryExpression("!", node);
+
+  const notnot = node => not(not(node));
+
+  const or = (a, b) => t.logicalExpression("||", a, b);
+
+  const and = (a, b) => t.logicalExpression("&&", a, b);
+
+  function simplifyPatterns(path) {
+    const test = path.get("test");
+    const consequent = path.get("consequent");
+    const alternate = path.get("alternate");
+
+    const _h$typeSymbols = h.typeSymbols(t),
+          EX = _h$typeSymbols.Expression; // Convention:
+    // ===============
+    // for each pattern [test, consequent, alternate, handler(expr, cons, alt)]
+
+
+    const matcher = new PatternMatch([[EX, true, false, e => notnot(e)], [EX, false, true, e => not(e)], [EX, true, EX, (e, c, a) => or(notnot(e), a)], [EX, false, EX, (e, c, a) => and(not(e), a)], [EX, EX, true, (e, c) => or(not(e), c)], [EX, EX, false, (e, c) => and(notnot(e), c)]]);
+    const result = matcher.match([test, consequent, alternate], h.isPatternMatchesPath(t));
+
+    if (result.match) {
+      path.replaceWith(result.value(test.node, consequent.node, alternate.node));
+    }
+  }
+
+  return {
+    simplifyPatterns
+  };
+};
+\ No newline at end of file