Returns "equal, ok".

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

Use this before calling "FollowSymbols" from separate threads to avoid concurrent map update hazards.

Returns the canonical ref that represents the ref for the provided symbol.

For readability, the names of certain automatically-generated symbols are derived from the file name.

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

"`a${'b'}c`" => "`abc`" This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

This does "IsIdentifierES5AndESNext(UTF16ToString(text))" without any allocations.

This does "IsIdentifier(UTF16ToString(text))" without any allocations.

If this returns true, then calling this expression captures the target of the property access as "this" when calling the function in the property.

See the "White Space Code Points" table in the ECMAScript standard.

The goal of this function is to "rotate" the AST if it's possible to use the left-associative property of the operator to avoid unnecessary parentheses.

Note: This function does not say whether the expression is side-effect free or not.

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

The given "expr" argument should be the operand of a "!" prefix operator (i.e.

This can be used when the returned type is either one or the other.

Makes "old" point to "new" by joining the linked lists for the two symbols together.

Wraps the provided expression in the "!" prefix operator.

Simplify syntax when we know it's used inside a boolean context This function intentionally avoids mutating the input AST so it can be called after the AST has been frozen (i.e.

This will return a nil expression if the expression can be totally removed.

Returns true if the result of the "typeof" operator on this expression is statically determined and this expression has no side effects (i.e.

"a = b".

"a += b".

Left-associative.

If you add a new token, remember to add it to "OpTable" too.

Right-associative.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

Non-associative.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If this is present, the symbol could potentially be overwritten.

If true, this symbol is the target of a "__name" helper function call.

This flag is to avoid warning about this symbol more than once.

The exports are stored on "module" and/or "exports".

All export names are known explicitly.

Some export names are known explicitly, but others fall back to a dynamic run-time object.

This file doesn't have any kind of export, so it's impossible to say what kind of file this is.

The linker doesn't report import/export mismatch errors.

The printer will replace this import with "undefined".

This means the symbol is a normal function that has no body statements.

This means the symbol is a normal function that takes a single argument and returns that argument.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.

".cjs" or ".cts" or "type: commonjs" in package.json.

".mjs" or ".mts" or "type: module" in package.json.

Certain symbols must not be renamed or minified.

In React's version of JSX, lower-case names are strings while upper-case names are identifiers.

This is the index to the automatically-generated part containing code that calls "__export(exports, { ..

"a?.b.c" => ".c" is OptionalChainContinue "(a?.b).c" => ".c" is OptionalChainNone.

"a.b".

"a?.b".

Sometimes we lower private symbols even if they are supported.

This is used to remove the all but the last function re-declaration if a function is re-declared multiple times like this: function foo() { console.log(1) } function foo() { console.log(2) } .

This is a module, TypeScript enum, or TypeScript namespace.

This is the special "arguments" variable inside functions.

There's a weird special case where catch variables declared using a simple identifier (i.e.

Classes can merge with TypeScript namespaces.

Assigning to a "const" symbol will throw a TypeError at runtime.

Generator and async functions are not hoisted, but still have special properties such as being able to overwrite previous functions with the same name.

This has special merging behavior.

In TypeScript, imports are allowed to silently collide with symbols within the module.

Injected symbols can be overridden by provided defines.

Labels are in their own namespace.

Properties can optionally be renamed to shorter names.

This annotates all other symbols that don't have special behavior.

A class-private identifier (i.e.

TypeScript enums can merge with TypeScript namespaces and other TypeScript enums.

TypeScript namespaces can merge with classes, functions, TypeScript enums, and other TypeScript namespaces.

An unbound symbol is one that isn't declared in the file it's referenced in.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

Prefix.

Postfix update.

If you add a new token, remember to add it to "OpTable" too.

Prefix update.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

If you add a new token, remember to add it to "OpTable" too.

This flags all symbols that were exported from the module using the ES6 "export" keyword, either directly on the declaration or using "export {}".

These help reduce unnecessary memory allocations.

This is similar to an EIdentifier but it represents a reference to an ES6 import item.

This represents an internal property name that can be mangled.

This is similar to EIdentifier but it represents class-private fields and methods.

This is used for both strings and no-substitution template literals to reduce the number of cases that need to be checked for string optimization code.

Each file is made up of multiple parts, and each part consists of one or more top-level statements.

Files are parsed in parallel for speed.

This is an "export = value;" statement in TypeScript.

This object represents all of these types of import statements: import 'path' import {item1, item2} from 'path' import * as ns from 'path' import defaultItem, {item1, item2} from 'path' import defaultItem, * as ns from 'path' Many parts are optional and can be combined in different ways.

The decision of whether to export an expression using "module.exports" or "export default" is deferred until linking using this statement kind.

This is a stand-in for a TypeScript type declaration.

Note: the order of values in this struct matters to reduce struct size.

"enum ns { it }".

"enum ns { it = 'it' }".

"namespace ns { export namespace it {} }".

"namespace ns { export let it }".

This is for TypeScript "enum" and "namespace" blocks.

This interface is never called.

This interface is never called.

This interface is never called.

This is a histogram of character frequencies for minification.