Commit

1 files changed, 459 insertions, 0 deletions

diff --git a/src/node_modules/terser/lib/size.js b/src/node_modules/terser/lib/size.js
new file mode 100644
index 0000000..01bbd4e
--- /dev/null
+++ b/src/node_modules/terser/lib/size.js
@@ -0,0 +1,459 @@
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Class,
+    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_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_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);
+    }, 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;
+
+/*#__INLINE__*/
+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;
+    }
+
+    return lambda_modifiers(this) + args_and_arrow + (Array.isArray(this.body) ? list_overhead(this.body) : this.body._size());
+};
+
+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_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_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_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;