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wgsl_reflect.node.js
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'use strict';
Object.defineProperty(exports, '__esModule', { value: true });
class ParseContext {
constructor() {
this.constants = new Map();
this.aliases = new Map();
this.structs = new Map();
}
}
/**
* @class Node
* @category AST
* Base class for AST nodes parsed from a WGSL shader.
*/
class Node {
constructor() { }
get isAstNode() {
return true;
}
get astNodeType() {
return "";
}
evaluate(context) {
throw new Error("Cannot evaluate node");
}
evaluateString(context) {
return this.evaluate(context).toString();
}
search(callback) { }
searchBlock(block, callback) {
if (block) {
callback(_BlockStart.instance);
for (const node of block) {
if (node instanceof Array) {
this.searchBlock(node, callback);
}
else {
node.search(callback);
}
}
callback(_BlockEnd.instance);
}
}
}
// For internal use only
class _BlockStart extends Node {
}
_BlockStart.instance = new _BlockStart();
// For internal use only
class _BlockEnd extends Node {
}
_BlockEnd.instance = new _BlockEnd();
/**
* @class Statement
* @extends Node
* @category AST
*/
class Statement extends Node {
constructor() {
super();
}
}
/**
* @class Function
* @extends Statement
* @category AST
*/
class Function extends Statement {
constructor(name, args, returnType, body, startLine, endLine) {
super();
this.calls = new Set();
this.name = name;
this.args = args;
this.returnType = returnType;
this.body = body;
this.startLine = startLine;
this.endLine = endLine;
}
get astNodeType() {
return "function";
}
search(callback) {
this.searchBlock(this.body, callback);
}
}
/**
* @class StaticAssert
* @extends Statement
* @category AST
*/
class StaticAssert extends Statement {
constructor(expression) {
super();
this.expression = expression;
}
get astNodeType() {
return "staticAssert";
}
search(callback) {
this.expression.search(callback);
}
}
/**
* @class While
* @extends Statement
* @category AST
*/
class While extends Statement {
constructor(condition, body) {
super();
this.condition = condition;
this.body = body;
}
get astNodeType() {
return "while";
}
search(callback) {
this.condition.search(callback);
this.searchBlock(this.body, callback);
}
}
/**
* @class Continuing
* @extends Statement
* @category AST
*/
class Continuing extends Statement {
constructor(body) {
super();
this.body = body;
}
get astNodeType() {
return "continuing";
}
search(callback) {
this.searchBlock(this.body, callback);
}
}
/**
* @class For
* @extends Statement
* @category AST
*/
class For extends Statement {
constructor(init, condition, increment, body) {
super();
this.init = init;
this.condition = condition;
this.increment = increment;
this.body = body;
}
get astNodeType() {
return "for";
}
search(callback) {
var _a, _b, _c;
(_a = this.init) === null || _a === void 0 ? void 0 : _a.search(callback);
(_b = this.condition) === null || _b === void 0 ? void 0 : _b.search(callback);
(_c = this.increment) === null || _c === void 0 ? void 0 : _c.search(callback);
this.searchBlock(this.body, callback);
}
}
/**
* @class Var
* @extends Statement
* @category AST
*/
class Var extends Statement {
constructor(name, type, storage, access, value) {
super();
this.name = name;
this.type = type;
this.storage = storage;
this.access = access;
this.value = value;
}
get astNodeType() {
return "var";
}
search(callback) {
var _a;
callback(this);
(_a = this.value) === null || _a === void 0 ? void 0 : _a.search(callback);
}
}
/**
* @class Override
* @extends Statement
* @category AST
*/
class Override extends Statement {
constructor(name, type, value) {
super();
this.name = name;
this.type = type;
this.value = value;
}
get astNodeType() {
return "override";
}
search(callback) {
var _a;
(_a = this.value) === null || _a === void 0 ? void 0 : _a.search(callback);
}
}
/**
* @class Let
* @extends Statement
* @category AST
*/
class Let extends Statement {
constructor(name, type, storage, access, value) {
super();
this.name = name;
this.type = type;
this.storage = storage;
this.access = access;
this.value = value;
}
get astNodeType() {
return "let";
}
search(callback) {
var _a;
callback(this);
(_a = this.value) === null || _a === void 0 ? void 0 : _a.search(callback);
}
}
/**
* @class Const
* @extends Statement
* @category AST
*/
class Const extends Statement {
constructor(name, type, storage, access, value) {
super();
this.name = name;
this.type = type;
this.storage = storage;
this.access = access;
this.value = value;
}
get astNodeType() {
return "const";
}
evaluate(context) {
return this.value.evaluate(context);
}
search(callback) {
var _a;
callback(this);
(_a = this.value) === null || _a === void 0 ? void 0 : _a.search(callback);
}
}
exports.IncrementOperator = void 0;
(function (IncrementOperator) {
IncrementOperator["increment"] = "++";
IncrementOperator["decrement"] = "--";
})(exports.IncrementOperator || (exports.IncrementOperator = {}));
(function (IncrementOperator) {
function parse(val) {
const key = val;
if (key == "parse")
throw new Error("Invalid value for IncrementOperator");
return IncrementOperator[key];
}
IncrementOperator.parse = parse;
})(exports.IncrementOperator || (exports.IncrementOperator = {}));
/**
* @class Increment
* @extends Statement
* @category AST
*/
class Increment extends Statement {
constructor(operator, variable) {
super();
this.operator = operator;
this.variable = variable;
}
get astNodeType() {
return "increment";
}
search(callback) {
this.variable.search(callback);
}
}
exports.AssignOperator = void 0;
(function (AssignOperator) {
AssignOperator["assign"] = "=";
AssignOperator["addAssign"] = "+=";
AssignOperator["subtractAssin"] = "-=";
AssignOperator["multiplyAssign"] = "*=";
AssignOperator["divideAssign"] = "/=";
AssignOperator["moduloAssign"] = "%=";
AssignOperator["andAssign"] = "&=";
AssignOperator["orAssign"] = "|=";
AssignOperator["xorAssign"] = "^=";
AssignOperator["shiftLeftAssign"] = "<<=";
AssignOperator["shiftRightAssign"] = ">>=";
})(exports.AssignOperator || (exports.AssignOperator = {}));
(function (AssignOperator) {
function parse(val) {
const key = val;
if (key == "parse") {
throw new Error("Invalid value for AssignOperator");
}
//return AssignOperator[key];
return key;
}
AssignOperator.parse = parse;
})(exports.AssignOperator || (exports.AssignOperator = {}));
/**
* @class Assign
* @extends Statement
* @category AST
*/
class Assign extends Statement {
constructor(operator, variable, value) {
super();
this.operator = operator;
this.variable = variable;
this.value = value;
}
get astNodeType() {
return "assign";
}
search(callback) {
this.variable.search(callback);
this.value.search(callback);
}
}
/**
* @class Call
* @extends Statement
* @category AST
*/
class Call extends Statement {
constructor(name, args) {
super();
this.name = name;
this.args = args;
}
get astNodeType() {
return "call";
}
search(callback) {
for (const node of this.args) {
node.search(callback);
}
callback(this);
}
}
/**
* @class Loop
* @extends Statement
* @category AST
*/
class Loop extends Statement {
constructor(body, continuing) {
super();
this.body = body;
this.continuing = continuing;
}
get astNodeType() {
return "loop";
}
}
/**
* @class Switch
* @extends Statement
* @category AST
*/
class Switch extends Statement {
constructor(condition, body) {
super();
this.condition = condition;
this.body = body;
}
get astNodeType() {
return "body";
}
}
/**
* @class If
* @extends Statement
* @category AST
*/
class If extends Statement {
constructor(condition, body, elseif, _else) {
super();
this.condition = condition;
this.body = body;
this.elseif = elseif;
this.else = _else;
}
get astNodeType() {
return "if";
}
search(callback) {
this.condition.search(callback);
this.searchBlock(this.body, callback);
this.searchBlock(this.elseif, callback);
this.searchBlock(this.else, callback);
}
}
/**
* @class Return
* @extends Statement
* @category AST
*/
class Return extends Statement {
constructor(value) {
super();
this.value = value;
}
get astNodeType() {
return "return";
}
search(callback) {
var _a;
(_a = this.value) === null || _a === void 0 ? void 0 : _a.search(callback);
}
}
/**
* @class Enable
* @extends Statement
* @category AST
*/
class Enable extends Statement {
constructor(name) {
super();
this.name = name;
}
get astNodeType() {
return "enable";
}
}
/**
* @class Requires
* @extends Statement
* @category AST
*/
class Requires extends Statement {
constructor(extensions) {
super();
this.extensions = extensions;
}
get astNodeType() {
return "requires";
}
}
/**
* @class Diagnostic
* @extends Statement
* @category AST
*/
class Diagnostic extends Statement {
constructor(severity, rule) {
super();
this.severity = severity;
this.rule = rule;
}
get astNodeType() {
return "diagnostic";
}
}
/**
* @class Alias
* @extends Statement
* @category AST
*/
class Alias extends Statement {
constructor(name, type) {
super();
this.name = name;
this.type = type;
}
get astNodeType() {
return "alias";
}
}
/**
* @class Discard
* @extends Statement
* @category AST
*/
class Discard extends Statement {
constructor() {
super();
}
get astNodeType() {
return "discard";
}
}
/**
* @class Break
* @extends Statement
* @category AST
*/
class Break extends Statement {
constructor() {
super();
}
get astNodeType() {
return "break";
}
}
/**
* @class Continue
* @extends Statement
* @category AST
*/
class Continue extends Statement {
constructor() {
super();
}
get astNodeType() {
return "continue";
}
}
/**
* @class Type
* @extends Statement
* @category AST
*/
class Type extends Statement {
constructor(name) {
super();
this.name = name;
}
get astNodeType() {
return "type";
}
get isStruct() {
return false;
}
get isArray() {
return false;
}
}
/**
* @class StructType
* @extends Type
* @category AST
*/
class Struct extends Type {
constructor(name, members, startLine, endLine) {
super(name);
this.members = members;
this.startLine = startLine;
this.endLine = endLine;
}
get astNodeType() {
return "struct";
}
get isStruct() {
return true;
}
/// Return the index of the member with the given name, or -1 if not found.
getMemberIndex(name) {
for (let i = 0; i < this.members.length; i++) {
if (this.members[i].name == name)
return i;
}
return -1;
}
}
/**
* @class TemplateType
* @extends Type
* @category AST
*/
class TemplateType extends Type {
constructor(name, format, access) {
super(name);
this.format = format;
this.access = access;
}
get astNodeType() {
return "template";
}
}
/**
* @class PointerType
* @extends Type
* @category AST
*/
class PointerType extends Type {
constructor(name, storage, type, access) {
super(name);
this.storage = storage;
this.type = type;
this.access = access;
}
get astNodeType() {
return "pointer";
}
}
/**
* @class ArrayType
* @extends Type
* @category AST
*/
class ArrayType extends Type {
constructor(name, attributes, format, count) {
super(name);
this.attributes = attributes;
this.format = format;
this.count = count;
}
get astNodeType() {
return "array";
}
get isArray() {
return true;
}
}
/**
* @class SamplerType
* @extends Type
* @category AST
*/
class SamplerType extends Type {
constructor(name, format, access) {
super(name);
this.format = format;
this.access = access;
}
get astNodeType() {
return "sampler";
}
}
/**
* @class Expression
* @extends Node
* @category AST
*/
class Expression extends Node {
constructor() {
super();
}
}
/**
* @class StringExpr
* @extends Expression
* @category AST
*/
class StringExpr extends Expression {
constructor(value) {
super();
this.value = value;
}
get astNodeType() {
return "stringExpr";
}
toString() {
return this.value;
}
evaluateString() {
return this.value;
}
}
/**
* @class CreateExpr
* @extends Expression
* @category AST
*/
class CreateExpr extends Expression {
constructor(type, args) {
super();
this.type = type;
this.args = args;
}
get astNodeType() {
return "createExpr";
}
search(callback) {
callback(this);
if (this.args) {
for (const node of this.args) {
node.search(callback);
}
}
}
evaluate(context) {
return this.args[0].evaluate(context);
}
}
/**
* @class CallExpr
* @extends Expression
* @category AST
*/
class CallExpr extends Expression {
constructor(name, args) {
super();
this.name = name;
this.args = args;
}
get astNodeType() {
return "callExpr";
}
evaluate(context) {
switch (this.name) {
case "abs":
return Math.abs(this.args[0].evaluate(context));
case "acos":
return Math.acos(this.args[0].evaluate(context));
case "acosh":
return Math.acosh(this.args[0].evaluate(context));
case "asin":
return Math.asin(this.args[0].evaluate(context));
case "asinh":
return Math.asinh(this.args[0].evaluate(context));
case "atan":
return Math.atan(this.args[0].evaluate(context));
case "atan2":
return Math.atan2(this.args[0].evaluate(context), this.args[1].evaluate(context));
case "atanh":
return Math.atanh(this.args[0].evaluate(context));
case "ceil":
return Math.ceil(this.args[0].evaluate(context));
case "clamp":
return Math.min(Math.max(this.args[0].evaluate(context), this.args[1].evaluate(context)), this.args[2].evaluate(context));
case "cos":
return Math.cos(this.args[0].evaluate(context));
//case "cross":
//TODO: (x[i] * y[j] - x[j] * y[i])
case "degrees":
return (this.args[0].evaluate(context) * 180) / Math.PI;
//case "determinant":
//TODO implement
case "distance":
return Math.sqrt(Math.pow(this.args[0].evaluate(context) - this.args[1].evaluate(context), 2));
case "dot":
//TODO: (x[i] * y[i])
case "exp":
return Math.exp(this.args[0].evaluate(context));
case "exp2":
return Math.pow(2, this.args[0].evaluate(context));
//case "extractBits":
//TODO: implement
//case "firstLeadingBit":
//TODO: implement
case "floor":
return Math.floor(this.args[0].evaluate(context));
case "fma":
return (this.args[0].evaluate(context) * this.args[1].evaluate(context) +
this.args[2].evaluate(context));
case "fract":
return (this.args[0].evaluate(context) -
Math.floor(this.args[0].evaluate(context)));
//case "frexp":
//TODO: implement
case "inverseSqrt":
return 1 / Math.sqrt(this.args[0].evaluate(context));
//case "length":
//TODO: implement
case "log":
return Math.log(this.args[0].evaluate(context));
case "log2":
return Math.log2(this.args[0].evaluate(context));
case "max":
return Math.max(this.args[0].evaluate(context), this.args[1].evaluate(context));
case "min":
return Math.min(this.args[0].evaluate(context), this.args[1].evaluate(context));
case "mix":
return (this.args[0].evaluate(context) *
(1 - this.args[2].evaluate(context)) +
this.args[1].evaluate(context) * this.args[2].evaluate(context));
case "modf":
return (this.args[0].evaluate(context) -
Math.floor(this.args[0].evaluate(context)));
case "pow":
return Math.pow(this.args[0].evaluate(context), this.args[1].evaluate(context));
case "radians":
return (this.args[0].evaluate(context) * Math.PI) / 180;
case "round":
return Math.round(this.args[0].evaluate(context));
case "sign":
return Math.sign(this.args[0].evaluate(context));
case "sin":
return Math.sin(this.args[0].evaluate(context));
case "sinh":
return Math.sinh(this.args[0].evaluate(context));
case "saturate":
return Math.min(Math.max(this.args[0].evaluate(context), 0), 1);
case "smoothstep":
return (this.args[0].evaluate(context) *
this.args[0].evaluate(context) *
(3 - 2 * this.args[0].evaluate(context)));
case "sqrt":
return Math.sqrt(this.args[0].evaluate(context));
case "step":
return this.args[0].evaluate(context) < this.args[1].evaluate(context)
? 0
: 1;
case "tan":
return Math.tan(this.args[0].evaluate(context));
case "tanh":
return Math.tanh(this.args[0].evaluate(context));
case "trunc":
return Math.trunc(this.args[0].evaluate(context));
default:
throw new Error("Non const function: " + this.name);
}
}
search(callback) {
for (const node of this.args) {
node.search(callback);
}
callback(this);
}
}
/**
* @class VariableExpr
* @extends Expression
* @category AST
*/
class VariableExpr extends Expression {
constructor(name) {
super();
this.name = name;
}
get astNodeType() {
return "varExpr";
}
search(callback) {
callback(this);
if (this.postfix) {
this.postfix.search(callback);
}
}
evaluate(context) {
const constant = context.constants.get(this.name);
if (!constant) {
throw new Error("Cannot evaluate node");
}
return constant.evaluate(context);
}
}
/**
* @class ConstExpr
* @extends Expression
* @category AST
*/
class ConstExpr extends Expression {
constructor(name, initializer) {
super();
this.name = name;
this.initializer = initializer;
}
get astNodeType() {
return "constExpr";
}
evaluate(context) {
var _a, _b;
if (this.initializer instanceof CreateExpr) {
// This is a struct constant
const property = (_a = this.postfix) === null || _a === void 0 ? void 0 : _a.evaluateString(context);
const type = (_b = this.initializer.type) === null || _b === void 0 ? void 0 : _b.name;
const struct = context.structs.get(type);
const memberIndex = struct === null || struct === void 0 ? void 0 : struct.getMemberIndex(property);
if (memberIndex !== undefined && memberIndex != -1) {
const value = this.initializer.args[memberIndex].evaluate(context);
return value;
}
else {
return this.initializer.evaluate(context);
}
}
return this.initializer.evaluate(context);
}
search(callback) {
this.initializer.search(callback);
}
}
/**
* @class LiteralExpr
* @extends Expression
* @category AST
*/
class LiteralExpr extends Expression {
constructor(value) {
super();
this.value = value;
}
get astNodeType() {
return "literalExpr";
}
evaluate() {
return this.value;
}
}
/**
* @class BitcastExpr
* @extends Expression
* @category AST
*/
class BitcastExpr extends Expression {
constructor(type, value) {
super();
this.type = type;
this.value = value;
}
get astNodeType() {
return "bitcastExpr";
}
search(callback) {
this.value.search(callback);
}
}
/**
* @class TypecastExpr
* @extends Expression
* @category AST
*/
class TypecastExpr extends Expression {
constructor(type, args) {
super();
this.type = type;
this.args = args;
}
get astNodeType() {
return "typecastExpr";
}
evaluate(context) {
return this.args[0].evaluate(context);
}
search(callback) {
this.searchBlock(this.args, callback);
}
}
/**
* @class GroupingExpr
* @extends Expression
* @category AST
*/
class GroupingExpr extends Expression {
constructor(contents) {
super();
this.contents = contents;
}
get astNodeType() {
return "groupExpr";
}
evaluate(context) {
return this.contents[0].evaluate(context);
}
search(callback) {
this.searchBlock(this.contents, callback);
}
}
/**
* @class ArrayIndex
* @extends Expression
* @category AST
*/
class ArrayIndex extends Expression {
constructor(index) {
super();
this.index = index;
}
search(callback) {
this.index.search(callback);
}
}
/**
* @class Operator
* @extends Expression
* @category AST
*/
class Operator extends Expression {
constructor() {
super();
}
}
/**
* @class UnaryOperator
* @extends Operator
* @category AST
* @property {string} operator +, -, !, ~
*/
class UnaryOperator extends Operator {
constructor(operator, right) {
super();
this.operator = operator;
this.right = right;
}
get astNodeType() {
return "unaryOp";
}
evaluate(context) {
switch (this.operator) {
case "+":
return this.right.evaluate(context);
case "-":
return -this.right.evaluate(context);