chore: implement `AliasOf`

src/Complex/arithmetic.ts

@@ -1,6 +1,6 @@
 import {Complex} from './type.js'
 import type {
-   Dependencies, Signature, Returns, RealType, ZeroType
+   Dependencies, Signature, Returns, RealType, AliasOf
 } from '../interfaces/type.js'
 
 declare module "../interfaces/type" {
@@ -9,8 +9,8 @@ declare module "../interfaces/type" {
       // after removing any `_...` suffixes; the following should be
       // additional dispatches for add and divide, not separate
       // operations, in the final mathjs bundle.
-      add_real:    (a: T, b: RealType<T>) => T
+      addReal: AliasOf<'add', (a: T, b: RealType<T>) => T>
-      divide_real: (a: T, b: RealType<T>) => T
+      divideReal: AliasOf<'divide', (a: T, b: RealType<T>) => T>
    }
 }
 
@@ -19,9 +19,9 @@ export const add =
    (w, z) => dep.complex(dep.add(w.re, z.re), dep.add(w.im, z.im))
 
 export const add_real =
-   <T>(dep: Dependencies<'add_real' | 'complex', T>):
+   <T>(dep: Dependencies<'addReal' | 'complex', T>):
-      Signature<'add_real', Complex<T>> =>
+      Signature<'addReal', Complex<T>> =>
-   (z, r) => dep.complex(dep.add_real(z.re, r), z.im)
+   (z, r) => dep.complex(dep.addReal(z.re, r), z.im)
 
 export const unaryMinus =
    <T>(dep: Dependencies<'unaryMinus' | 'complex', T>):
@@ -58,14 +58,14 @@ export const absquare =
    z => dep.add(dep.absquare(z.re), dep.absquare(z.im))
 
 export const divideByReal =
-   <T>(dep: Dependencies<'divide_real' | 'complex', T>):
+   <T>(dep: Dependencies<'divideReal' | 'complex', T>):
-      Signature<'divide_real', Complex<T>> =>
+      Signature<'divideReal', Complex<T>> =>
-   (z, r) => dep.complex(dep.divide_real(z.re, r), dep.divide_real(z.im, r))
+   (z, r) => dep.complex(dep.divideReal(z.re, r), dep.divideReal(z.im, r))
 
 export const reciprocal =
-   <T>(dep: Dependencies<'conj' | 'absquare' | 'divide_real', Complex<T>>):
+   <T>(dep: Dependencies<'conj' | 'absquare' | 'divideReal', Complex<T>>):
       Signature<'reciprocal', Complex<T>> =>
-   z => dep.divide_real(dep.conj(z), dep.absquare(z))
+   z => dep.divideReal(dep.conj(z), dep.absquare(z))
 
 export const divide =
    <T>(dep: Dependencies<'multiply' | 'reciprocal', Complex<T>>):
@@ -80,9 +80,9 @@ export const divide =
 export const sqrt =
    <T>(dep: Dependencies<'add' | 'equal' | 'conservativeSqrt' | 'unaryMinus',
                          RealType<T>>
-       & Dependencies<'zero' | 'add_real' | 'complex', T>
+       & Dependencies<'zero' | 'addReal' | 'complex', T>
-       & Dependencies<'absquare' | 're' | 'divide_real', Complex<T>>
+       & Dependencies<'absquare' | 're' | 'divideReal', Complex<T>>
-       & {add_complex_real: Signature<'add_real', Complex<T>>}):
+       & {add_complex_real: Signature<'addReal', Complex<T>>}):
       Signature<'sqrt', Complex<T>> =>
    z => {
       const myabs = dep.conservativeSqrt(dep.absquare(z))
@@ -91,12 +91,12 @@ export const sqrt =
       if (dep.equal(myabs, negr)) {
          // pure imaginary square root; z.im already zero
          return dep.complex(
-            dep.zero(z.re), dep.add_real(z.im, dep.conservativeSqrt(negr)))
+            dep.zero(z.re), dep.addReal(z.im, dep.conservativeSqrt(negr)))
       }
       const num = dep.add_complex_real(z, myabs)
       const denomsq = dep.add(dep.add(myabs, myabs), dep.add(r, r))
       const denom = dep.conservativeSqrt(denomsq)
-      return dep.divide_real(num, denom)
+      return dep.divideReal(num, denom)
    }
 
 export const conservativeSqrt = sqrt

src/interfaces/type.ts

@@ -71,3 +71,5 @@ type SignatureKey = keyof Signatures<unknown>
 export type Signature<Name extends SignatureKey, T> = Signatures<T>[Name]
 export type Returns<Name extends SignatureKey, T> = ReturnType<Signatures<T>[Name]>
 export type Dependencies<Name extends SignatureKey, T> = {[K in Name]: Signature<K, T>}
+
+export type AliasOf<Name extends string, T> = T & {aliasOf?: Name}