@thi.ng/shader-ast/ast/checks.js

DSL to define shader code in TypeScript and cross-compile to GLSL, JS and other targets

import { isArrayLike } from "@thi.ng/checks/is-arraylike";
import { isNumber } from "@thi.ng/checks/is-number";
import { isPlainObject } from "@thi.ng/checks/is-plain-object";
import {
  B,
  F,
  I,
  U
} from "../api/types.js";
const RE_VEC = /^[iub]?vec[234]$/;
const RE_MAT = /^mat[234]$/;
const isTerm = (t) => isPlainObject(t) && !!t.tag && !!t.type;
const isBool = (t) => t.type === B;
const isFloat = (t) => t.type === F;
const isInt = (t) => t.type === I;
const isUint = (t) => t.type === U;
const isLit = (t) => t.tag === "lit";
const isLitFloat = (t) => isLit(t) && isFloat(t);
const isLitInt = (t) => isLit(t) && isInt(t);
const isLitNumeric = (t) => isLit(t) && (isFloat(t) || isInt(t) || isUint(t));
const isLitNumericConst = (t) => isLit(t) && isNumber(t.val);
const isLitVecConst = (t) => isLit(t) && isVec(t) && isArrayLike(t.val);
const isLitNumOrVecConst = (t, n) => isLitNumericConst(t) && t.val === n || isLitVecConst(t) && t.val.every((x) => isLitNumericConst(x) && x.val === n);
const isVec = (t) => RE_VEC.test(t.type);
const isMat = (t) => RE_MAT.test(t.type);
export {
  isBool,
  isFloat,
  isInt,
  isLit,
  isLitFloat,
  isLitInt,
  isLitNumOrVecConst,
  isLitNumeric,
  isLitNumericConst,
  isLitVecConst,
  isMat,
  isTerm,
  isUint,
  isVec
};