2 files changed, 51 insertions, 0 deletions
diff --git a/llparse-frontend/src/utils/identifier.ts b/llparse-frontend/src/utils/identifier.ts
new file mode 100644
index 0000000..c9ba6ad
--- /dev/null
+++ b/llparse-frontend/src/utils/identifier.ts
@@ -0,0 +1,32 @@
+export interface IUniqueName {
+  readonly name: string;
+  readonly originalName: string;
+}
+
+export class Identifier {
+  private readonly ns: Set<string> = new Set();
+
+  constructor(private readonly prefix: string = '',
+              private readonly postfix: string = '') {
+  }
+
+  public id(name: string): IUniqueName {
+    let target = this.prefix + name + this.postfix;
+    if (this.ns.has(target)) {
+      let i = 1;
+      for (; i < this.ns.size; i++) {
+        if (!this.ns.has(target + '_' + i)) {
+          break;
+        }
+      }
+
+      target += '_' + i;
+    }
+
+    this.ns.add(target);
+    return {
+      name: target,
+      originalName: name,
+    };
+  }
+}
diff --git a/llparse-frontend/src/utils/index.ts b/llparse-frontend/src/utils/index.ts
new file mode 100644
index 0000000..06e86f1
--- /dev/null
+++ b/llparse-frontend/src/utils/index.ts
@@ -0,0 +1,19 @@
+export { Identifier, IUniqueName } from './identifier';
+
+export function toCacheKey(value: number | boolean): string {
+  if (typeof value === 'number') {
+    if (value < 0) {
+      return 'm' + (-value);
+    } else {
+      return value.toString();
+    }
+  } else if (typeof value === 'boolean') {
+    if (value === true) {
+      return 'true';
+    } else {
+      return 'false';
+    }
+  } else {
+    throw new Error(`Unsupported value: "${value}"`);
+  }
+}