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support class static initialization block (#5488)

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This commit is contained in:
Alex Lam S.L
2022-06-06 05:01:15 +01:00
committed by GitHub
parent d2bd0d1c1c
commit 88b4283200
6 changed files with 304 additions and 31 deletions
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23
lib/ast.js
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@@ -534,7 +534,7 @@ var AST_With = DEFNODE("With", "expression", {
/* -----[ scope and functions ]----- */
var AST_Scope = DEFNODE("Scope", "fn_defs may_call_this uses_eval uses_with", {
$documentation: "Base class for all statements introducing a lexical scope",
$documentation: "Base class for all statements introducing a lambda scope",
$propdoc: {
uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
@@ -592,6 +592,10 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
}
}, AST_Scope);
var AST_ClassInitBlock = DEFNODE("ClassInitBlock", null, {
$documentation: "Value for `class` static initialization blocks",
}, AST_Scope);
var AST_Lambda = DEFNODE("Lambda", "argnames length_read rest safe_ids uses_arguments", {
$documentation: "Base class for functions",
$propdoc: {
@@ -874,7 +878,7 @@ var AST_ClassExpression = DEFNODE("ClassExpression", null, {
var AST_ClassProperty = DEFNODE("ClassProperty", "key private static value", {
$documentation: "Base class for `class` properties",
$propdoc: {
key: "[string|AST_Node] property name (AST_Node for computed property)",
key: "[string|AST_Node?] property name (AST_Node for computed property, null for initialization block)",
private: "[boolean] whether this is a private property",
static: "[boolean] whether this is a static property",
value: "[AST_Node?] property value (AST_Accessor for getters/setters, AST_LambdaExpression for methods, null if not specified for fields)",
@@ -888,7 +892,9 @@ var AST_ClassProperty = DEFNODE("ClassProperty", "key private static value", {
},
_validate: function() {
if (this.TYPE == "ClassProperty") throw new Error("should not instantiate AST_ClassProperty");
if (typeof this.key != "string") {
if (this instanceof AST_ClassInit) {
if (this.key != null) throw new Error("key must be null");
} else if (typeof this.key != "string") {
if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
must_be_expression(this, "key");
}
@@ -928,6 +934,17 @@ var AST_ClassMethod = DEFNODE("ClassMethod", null, {
},
}, AST_ClassProperty);
var AST_ClassInit = DEFNODE("ClassInit", null, {
$documentation: "A `class` static initialization block",
_validate: function() {
if (!this.static) throw new Error("static must be true");
if (!(this.value instanceof AST_ClassInitBlock)) throw new Error("value must be AST_ClassInitBlock");
},
initialize: function() {
this.static = true;
},
}, AST_ClassProperty);
/* -----[ JUMPS ]----- */
var AST_Jump = DEFNODE("Jump", null, {