2 files changed, 99 insertions, 0 deletions
diff --git a/llparse-frontend/src/container/index.ts b/llparse-frontend/src/container/index.ts
new file mode 100644
index 0000000..a62aac8
--- /dev/null
+++ b/llparse-frontend/src/container/index.ts
@@ -0,0 +1,84 @@
+import * as assert from 'assert';
+
+import { ICodeImplementation } from '../implementation/code';
+import { IImplementation } from '../implementation/full';
+import { INodeImplementation } from '../implementation/node';
+import { ITransformImplementation } from '../implementation/transform';
+import { IWrap } from '../wrap';
+import { ContainerWrap } from './wrap';
+
+export { ContainerWrap };
+
+export class Container {
+  private readonly map: Map<string, IImplementation> = new Map();
+
+  public add(key: string, impl: IImplementation): void {
+    assert(!this.map.has(key), `Duplicate implementation key: "${key}"`);
+    this.map.set(key, impl);
+  }
+
+  public build(): IImplementation {
+    return {
+      code: this.buildCode(),
+      node: this.buildNode(),
+      transform: this.buildTransform(),
+    };
+  }
+
+  public buildCode(): ICodeImplementation {
+    return {
+      And: this.combine((impl) => impl.code.And),
+      IsEqual: this.combine((impl) => impl.code.IsEqual),
+      Load: this.combine((impl) => impl.code.Load),
+      Match: this.combine((impl) => impl.code.Match),
+      MulAdd: this.combine((impl) => impl.code.MulAdd),
+      Or: this.combine((impl) => impl.code.Or),
+      Span: this.combine((impl) => impl.code.Span),
+      Store: this.combine((impl) => impl.code.Store),
+      Test: this.combine((impl) => impl.code.Test),
+      Update: this.combine((impl) => impl.code.Update),
+      Value: this.combine((impl) => impl.code.Value),
+    };
+  }
+
+  public buildNode(): INodeImplementation {
+    return {
+      Consume: this.combine((impl) => impl.node.Consume),
+      Empty: this.combine((impl) => impl.node.Empty),
+      Error: this.combine((impl) => impl.node.Error),
+      Invoke: this.combine((impl) => impl.node.Invoke),
+      Pause: this.combine((impl) => impl.node.Pause),
+      Sequence: this.combine((impl) => impl.node.Sequence),
+      Single: this.combine((impl) => impl.node.Single),
+      SpanEnd: this.combine((impl) => impl.node.SpanEnd),
+      SpanStart: this.combine((impl) => impl.node.SpanStart),
+      TableLookup: this.combine((impl) => impl.node.TableLookup),
+    };
+  }
+
+  public buildTransform(): ITransformImplementation {
+    return {
+      ID: this.combine((impl) => impl.transform.ID),
+      ToLower: this.combine((impl) => impl.transform.ToLower),
+      ToLowerUnsafe: this.combine((impl) => impl.transform.ToLowerUnsafe),
+    };
+  }
+
+  private combine<T>(gather: (impl: IImplementation) => new(n: T) => IWrap<T>)
+    : new(n: T) => ContainerWrap<T> {
+    const wraps: Map<string, new(n: T) => IWrap<T>> = new Map();
+    for (const [ key, impl ] of this.map) {
+      wraps.set(key, gather(impl));
+    }
+
+    return class ContainerWrapSingle extends ContainerWrap<T> {
+      constructor(ref: T) {
+        super(ref);
+
+        for (const [ key, impl ] of wraps) {
+          this.map.set(key, new impl(ref));
+        }
+      }
+    };
+  }
+}
diff --git a/llparse-frontend/src/container/wrap.ts b/llparse-frontend/src/container/wrap.ts
new file mode 100644
index 0000000..f3b886c
--- /dev/null
+++ b/llparse-frontend/src/container/wrap.ts
@@ -0,0 +1,15 @@
+import * as assert from 'assert';
+
+import { IWrap } from '../wrap';
+
+export class ContainerWrap<T> {
+  protected readonly map: Map<string, IWrap<T>> = new Map();
+
+  constructor(public readonly ref: T) {
+  }
+
+  public get<R extends IWrap<T>>(key: string): R {
+    assert(this.map.has(key), `Unknown implementation key "${key}"`);
+    return this.map.get(key)! as R;
+  }
+}