Procedurally generate EnumerableSet and EnumerableMap (#3429)

scripts/generate/templates/conversion.js

@@ -0,0 +1,30 @@
+function toBytes32 (type, value) {
+  switch (type) {
+  case 'bytes32':
+    return value;
+  case 'uint256':
+    return `bytes32(${value})`;
+  case 'address':
+    return `bytes32(uint256(uint160(${value})))`;
+  default:
+    throw new Error(`Conversion from ${type} to bytes32 not supported`);
+  }
+}
+
+function fromBytes32 (type, value) {
+  switch (type) {
+  case 'bytes32':
+    return value;
+  case 'uint256':
+    return `uint256(${value})`;
+  case 'address':
+    return `address(uint160(uint256(${value})))`;
+  default:
+    throw new Error(`Conversion from bytes32 to ${type} not supported`);
+  }
+}
+
+module.exports = {
+  toBytes32,
+  fromBytes32,
+};