TokenFusion

Defined in: packages/engine/src/normalizer/NormalizerRule.ts:310

Record of a token fusion event performed by the normalizer.

When a rule merges multiple source tokens into fewer replacement tokens, the normalizer fires a fusion callback with this record. The playground uses these records to render the fusion detail table showing exactly which tokens were merged and by which rule.

Example

// "to" "the" "power" "of" fused into CARET "^"
const fusion: TokenFusion = {
  rule: "phrase:to the power of",
  sourceTokens: [toToken, theToken, powerToken, ofToken],
  fusedToken: caretToken,
};

Properties

fusedToken

fusedToken: Token;

Defined in: packages/engine/src/normalizer/NormalizerRule.ts:318

The resulting fused token with its new type and combined value

---

rule

rule: string;

Defined in: packages/engine/src/normalizer/NormalizerRule.ts:312

The name of the rule that triggered this fusion (e.g., “phrase:to the power of”)

---

sourceTokens

sourceTokens: Token[];

Defined in: packages/engine/src/normalizer/NormalizerRule.ts:315

The original tokens before fusion, always ≥ 2 tokens