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import {
AST_Accessor,
AST_Array,
AST_Arrow,
AST_Await,
AST_BigInt,
AST_Binary,
AST_Block,
AST_Break,
AST_Call,
AST_Case,
AST_Class,
AST_ClassPrivateProperty,
AST_ClassProperty,
AST_ConciseMethod,
AST_Conditional,
AST_Const,
AST_Continue,
AST_Debugger,
AST_Default,
AST_Defun,
AST_Destructuring,
AST_Directive,
AST_Do,
AST_Dot,
AST_DotHash,
AST_EmptyStatement,
AST_Expansion,
AST_Export,
AST_False,
AST_For,
AST_ForIn,
AST_Function,
AST_Hole,
AST_If,
AST_Import,
AST_ImportMeta,
AST_Infinity,
AST_LabeledStatement,
AST_Let,
AST_NameMapping,
AST_NaN,
AST_New,
AST_NewTarget,
AST_Node,
AST_Null,
AST_Number,
AST_Object,
AST_ObjectKeyVal,
AST_ObjectGetter,
AST_ObjectSetter,
AST_PrivateGetter,
AST_PrivateMethod,
AST_PrivateSetter,
AST_RegExp,
AST_Return,
AST_Sequence,
AST_String,
AST_Sub,
AST_Super,
AST_Switch,
AST_Symbol,
AST_SymbolClassProperty,
AST_SymbolExportForeign,
AST_SymbolImportForeign,
AST_SymbolRef,
AST_SymbolDeclaration,
AST_TemplateSegment,
AST_TemplateString,
AST_This,
AST_Throw,
AST_Toplevel,
AST_True,
AST_Try,
AST_Catch,
AST_Finally,
AST_Unary,
AST_Undefined,
AST_Var,
AST_VarDef,
AST_While,
AST_With,
AST_Yield,
walk_parent
} from "./ast.js";
import { first_in_statement } from "./utils/first_in_statement.js";
let mangle_options = undefined;
AST_Node.prototype.size = function (compressor, stack) {
mangle_options = compressor && compressor.mangle_options;
let size = 0;
walk_parent(this, (node, info) => {
size += node._size(info);
// Braceless arrow functions have fake "return" statements
if (node instanceof AST_Arrow && node.is_braceless()) {
size += node.body[0].value._size(info);
return true;
}
}, stack || (compressor && compressor.stack));
// just to save a bit of memory
mangle_options = undefined;
return size;
};
AST_Node.prototype._size = () => 0;
AST_Debugger.prototype._size = () => 8;
AST_Directive.prototype._size = function () {
// TODO string encoding stuff
return 2 + this.value.length;
};
const list_overhead = (array) => array.length && array.length - 1;
AST_Block.prototype._size = function () {
return 2 + list_overhead(this.body);
};
AST_Toplevel.prototype._size = function() {
return list_overhead(this.body);
};
AST_EmptyStatement.prototype._size = () => 1;
AST_LabeledStatement.prototype._size = () => 2; // x:
AST_Do.prototype._size = () => 9;
AST_While.prototype._size = () => 7;
AST_For.prototype._size = () => 8;
AST_ForIn.prototype._size = () => 8;
// AST_ForOf inherits ^
AST_With.prototype._size = () => 6;
AST_Expansion.prototype._size = () => 3;
const lambda_modifiers = func =>
(func.is_generator ? 1 : 0) + (func.async ? 6 : 0);
AST_Accessor.prototype._size = function () {
return lambda_modifiers(this) + 4 + list_overhead(this.argnames) + list_overhead(this.body);
};
AST_Function.prototype._size = function (info) {
const first = !!first_in_statement(info);
return (first * 2) + lambda_modifiers(this) + 12 + list_overhead(this.argnames) + list_overhead(this.body);
};
AST_Defun.prototype._size = function () {
return lambda_modifiers(this) + 13 + list_overhead(this.argnames) + list_overhead(this.body);
};
AST_Arrow.prototype._size = function () {
let args_and_arrow = 2 + list_overhead(this.argnames);
if (
!(
this.argnames.length === 1
&& this.argnames[0] instanceof AST_Symbol
)
) {
args_and_arrow += 2;
}
const body_overhead = this.is_braceless() ? 0 : list_overhead(this.body) + 2;
return lambda_modifiers(this) + args_and_arrow + body_overhead;
};
AST_Destructuring.prototype._size = () => 2;
AST_TemplateString.prototype._size = function () {
return 2 + (Math.floor(this.segments.length / 2) * 3); /* "${}" */
};
AST_TemplateSegment.prototype._size = function () {
return this.value.length;
};
AST_Return.prototype._size = function () {
return this.value ? 7 : 6;
};
AST_Throw.prototype._size = () => 6;
AST_Break.prototype._size = function () {
return this.label ? 6 : 5;
};
AST_Continue.prototype._size = function () {
return this.label ? 9 : 8;
};
AST_If.prototype._size = () => 4;
AST_Switch.prototype._size = function () {
return 8 + list_overhead(this.body);
};
AST_Case.prototype._size = function () {
return 5 + list_overhead(this.body);
};
AST_Default.prototype._size = function () {
return 8 + list_overhead(this.body);
};
AST_Try.prototype._size = function () {
return 3 + list_overhead(this.body);
};
AST_Catch.prototype._size = function () {
let size = 7 + list_overhead(this.body);
if (this.argname) {
size += 2;
}
return size;
};
AST_Finally.prototype._size = function () {
return 7 + list_overhead(this.body);
};
/*#__INLINE__*/
const def_size = (size, def) => size + list_overhead(def.definitions);
AST_Var.prototype._size = function () {
return def_size(4, this);
};
AST_Let.prototype._size = function () {
return def_size(4, this);
};
AST_Const.prototype._size = function () {
return def_size(6, this);
};
AST_VarDef.prototype._size = function () {
return this.value ? 1 : 0;
};
AST_NameMapping.prototype._size = function () {
// foreign name isn't mangled
return this.name ? 4 : 0;
};
AST_Import.prototype._size = function () {
// import
let size = 6;
if (this.imported_name) size += 1;
// from
if (this.imported_name || this.imported_names) size += 5;
// braces, and the commas
if (this.imported_names) {
size += 2 + list_overhead(this.imported_names);
}
return size;
};
AST_ImportMeta.prototype._size = () => 11;
AST_Export.prototype._size = function () {
let size = 7 + (this.is_default ? 8 : 0);
if (this.exported_value) {
size += this.exported_value._size();
}
if (this.exported_names) {
// Braces and commas
size += 2 + list_overhead(this.exported_names);
}
if (this.module_name) {
// "from "
size += 5;
}
return size;
};
AST_Call.prototype._size = function () {
if (this.optional) {
return 4 + list_overhead(this.args);
}
return 2 + list_overhead(this.args);
};
AST_New.prototype._size = function () {
return 6 + list_overhead(this.args);
};
AST_Sequence.prototype._size = function () {
return list_overhead(this.expressions);
};
AST_Dot.prototype._size = function () {
if (this.optional) {
return this.property.length + 2;
}
return this.property.length + 1;
};
AST_DotHash.prototype._size = function () {
if (this.optional) {
return this.property.length + 3;
}
return this.property.length + 2;
};
AST_Sub.prototype._size = function () {
return this.optional ? 4 : 2;
};
AST_Unary.prototype._size = function () {
if (this.operator === "typeof") return 7;
if (this.operator === "void") return 5;
return this.operator.length;
};
AST_Binary.prototype._size = function (info) {
if (this.operator === "in") return 4;
let size = this.operator.length;
if (
(this.operator === "+" || this.operator === "-")
&& this.right instanceof AST_Unary && this.right.operator === this.operator
) {
// 1+ +a > needs space between the +
size += 1;
}
if (this.needs_parens(info)) {
size += 2;
}
return size;
};
AST_Conditional.prototype._size = () => 3;
AST_Array.prototype._size = function () {
return 2 + list_overhead(this.elements);
};
AST_Object.prototype._size = function (info) {
let base = 2;
if (first_in_statement(info)) {
base += 2; // parens
}
return base + list_overhead(this.properties);
};
/*#__INLINE__*/
const key_size = key =>
typeof key === "string" ? key.length : 0;
AST_ObjectKeyVal.prototype._size = function () {
return key_size(this.key) + 1;
};
/*#__INLINE__*/
const static_size = is_static => is_static ? 7 : 0;
AST_ObjectGetter.prototype._size = function () {
return 5 + static_size(this.static) + key_size(this.key);
};
AST_ObjectSetter.prototype._size = function () {
return 5 + static_size(this.static) + key_size(this.key);
};
AST_ConciseMethod.prototype._size = function () {
return static_size(this.static) + key_size(this.key) + lambda_modifiers(this);
};
AST_PrivateMethod.prototype._size = function () {
return AST_ConciseMethod.prototype._size.call(this) + 1;
};
AST_PrivateGetter.prototype._size = AST_PrivateSetter.prototype._size = function () {
return AST_ConciseMethod.prototype._size.call(this) + 4;
};
AST_Class.prototype._size = function () {
return (
(this.name ? 8 : 7)
+ (this.extends ? 8 : 0)
);
};
AST_ClassProperty.prototype._size = function () {
return (
static_size(this.static)
+ (typeof this.key === "string" ? this.key.length + 2 : 0)
+ (this.value ? 1 : 0)
);
};
AST_ClassPrivateProperty.prototype._size = function () {
return AST_ClassProperty.prototype._size.call(this) + 1;
};
AST_Symbol.prototype._size = function () {
return !mangle_options || this.definition().unmangleable(mangle_options)
? this.name.length
: 1;
};
// TODO take propmangle into account
AST_SymbolClassProperty.prototype._size = function () {
return this.name.length;
};
AST_SymbolRef.prototype._size = AST_SymbolDeclaration.prototype._size = function () {
const { name, thedef } = this;
if (thedef && thedef.global) return name.length;
if (name === "arguments") return 9;
return AST_Symbol.prototype._size.call(this);
};
AST_NewTarget.prototype._size = () => 10;
AST_SymbolImportForeign.prototype._size = function () {
return this.name.length;
};
AST_SymbolExportForeign.prototype._size = function () {
return this.name.length;
};
AST_This.prototype._size = () => 4;
AST_Super.prototype._size = () => 5;
AST_String.prototype._size = function () {
return this.value.length + 2;
};
AST_Number.prototype._size = function () {
const { value } = this;
if (value === 0) return 1;
if (value > 0 && Math.floor(value) === value) {
return Math.floor(Math.log10(value) + 1);
}
return value.toString().length;
};
AST_BigInt.prototype._size = function () {
return this.value.length;
};
AST_RegExp.prototype._size = function () {
return this.value.toString().length;
};
AST_Null.prototype._size = () => 4;
AST_NaN.prototype._size = () => 3;
AST_Undefined.prototype._size = () => 6; // "void 0"
AST_Hole.prototype._size = () => 0; // comma is taken into account
AST_Infinity.prototype._size = () => 8;
AST_True.prototype._size = () => 4;
AST_False.prototype._size = () => 5;
AST_Await.prototype._size = () => 6;
AST_Yield.prototype._size = () => 6;