import {
AST_Array,
AST_Atom,
AST_Await,
AST_BigInt,
AST_Binary,
AST_Block,
AST_Call,
AST_Catch,
AST_Chain,
AST_Class,
AST_ClassProperty,
AST_ConciseMethod,
AST_Conditional,
AST_Debugger,
AST_Definitions,
AST_Destructuring,
AST_Directive,
AST_Do,
AST_Dot,
AST_DotHash,
AST_EmptyStatement,
AST_Expansion,
AST_Export,
AST_Finally,
AST_For,
AST_ForIn,
AST_ForOf,
AST_If,
AST_Import,
AST_ImportMeta,
AST_Jump,
AST_LabeledStatement,
AST_Lambda,
AST_LoopControl,
AST_NameMapping,
AST_NewTarget,
AST_Node,
AST_Number,
AST_Object,
AST_ObjectGetter,
AST_ObjectKeyVal,
AST_ObjectProperty,
AST_ObjectSetter,
AST_PrefixedTemplateString,
AST_PropAccess,
AST_RegExp,
AST_Sequence,
AST_SimpleStatement,
AST_String,
AST_Super,
AST_Switch,
AST_SwitchBranch,
AST_Symbol,
AST_TemplateSegment,
AST_TemplateString,
AST_This,
AST_Toplevel,
AST_Try,
AST_Unary,
AST_VarDef,
AST_While,
AST_With,
AST_Yield
} from "./ast.js";
const shallow_cmp = (node1, node2) => {
return (
node1 === null && node2 === null
|| node1.TYPE === node2.TYPE && node1.shallow_cmp(node2)
);
};
export const equivalent_to = (tree1, tree2) => {
if (!shallow_cmp(tree1, tree2)) return false;
const walk_1_state = [tree1];
const walk_2_state = [tree2];
const walk_1_push = walk_1_state.push.bind(walk_1_state);
const walk_2_push = walk_2_state.push.bind(walk_2_state);
while (walk_1_state.length && walk_2_state.length) {
const node_1 = walk_1_state.pop();
const node_2 = walk_2_state.pop();
if (!shallow_cmp(node_1, node_2)) return false;
node_1._children_backwards(walk_1_push);
node_2._children_backwards(walk_2_push);
if (walk_1_state.length !== walk_2_state.length) {
// Different number of children
return false;
}
}
return walk_1_state.length == 0 && walk_2_state.length == 0;
};
const pass_through = () => true;
AST_Node.prototype.shallow_cmp = function () {
throw new Error("did not find a shallow_cmp function for " + this.constructor.name);
};
AST_Debugger.prototype.shallow_cmp = pass_through;
AST_Directive.prototype.shallow_cmp = function(other) {
return this.value === other.value;
};
AST_SimpleStatement.prototype.shallow_cmp = pass_through;
AST_Block.prototype.shallow_cmp = pass_through;
AST_EmptyStatement.prototype.shallow_cmp = pass_through;
AST_LabeledStatement.prototype.shallow_cmp = function(other) {
return this.label.name === other.label.name;
};
AST_Do.prototype.shallow_cmp = pass_through;
AST_While.prototype.shallow_cmp = pass_through;
AST_For.prototype.shallow_cmp = function(other) {
return (this.init == null ? other.init == null : this.init === other.init) && (this.condition == null ? other.condition == null : this.condition === other.condition) && (this.step == null ? other.step == null : this.step === other.step);
};
AST_ForIn.prototype.shallow_cmp = pass_through;
AST_ForOf.prototype.shallow_cmp = pass_through;
AST_With.prototype.shallow_cmp = pass_through;
AST_Toplevel.prototype.shallow_cmp = pass_through;
AST_Expansion.prototype.shallow_cmp = pass_through;
AST_Lambda.prototype.shallow_cmp = function(other) {
return this.is_generator === other.is_generator && this.async === other.async;
};
AST_Destructuring.prototype.shallow_cmp = function(other) {
return this.is_array === other.is_array;
};
AST_PrefixedTemplateString.prototype.shallow_cmp = pass_through;
AST_TemplateString.prototype.shallow_cmp = pass_through;
AST_TemplateSegment.prototype.shallow_cmp = function(other) {
return this.value === other.value;
};
AST_Jump.prototype.shallow_cmp = pass_through;
AST_LoopControl.prototype.shallow_cmp = pass_through;
AST_Await.prototype.shallow_cmp = pass_through;
AST_Yield.prototype.shallow_cmp = function(other) {
return this.is_star === other.is_star;
};
AST_If.prototype.shallow_cmp = function(other) {
return this.alternative == null ? other.alternative == null : this.alternative === other.alternative;
};
AST_Switch.prototype.shallow_cmp = pass_through;
AST_SwitchBranch.prototype.shallow_cmp = pass_through;
AST_Try.prototype.shallow_cmp = function(other) {
return (this.body === other.body) && (this.bcatch == null ? other.bcatch == null : this.bcatch === other.bcatch) && (this.bfinally == null ? other.bfinally == null : this.bfinally === other.bfinally);
};
AST_Catch.prototype.shallow_cmp = function(other) {
return this.argname == null ? other.argname == null : this.argname === other.argname;
};
AST_Finally.prototype.shallow_cmp = pass_through;
AST_Definitions.prototype.shallow_cmp = pass_through;
AST_VarDef.prototype.shallow_cmp = function(other) {
return this.value == null ? other.value == null : this.value === other.value;
};
AST_NameMapping.prototype.shallow_cmp = pass_through;
AST_Import.prototype.shallow_cmp = function(other) {
return (this.imported_name == null ? other.imported_name == null : this.imported_name === other.imported_name) && (this.imported_names == null ? other.imported_names == null : this.imported_names === other.imported_names);
};
AST_ImportMeta.prototype.shallow_cmp = pass_through;
AST_Export.prototype.shallow_cmp = function(other) {
return (this.exported_definition == null ? other.exported_definition == null : this.exported_definition === other.exported_definition) && (this.exported_value == null ? other.exported_value == null : this.exported_value === other.exported_value) && (this.exported_names == null ? other.exported_names == null : this.exported_names === other.exported_names) && this.module_name === other.module_name && this.is_default === other.is_default;
};
AST_Call.prototype.shallow_cmp = pass_through;
AST_Sequence.prototype.shallow_cmp = pass_through;
AST_PropAccess.prototype.shallow_cmp = pass_through;
AST_Chain.prototype.shallow_cmp = pass_through;
AST_Dot.prototype.shallow_cmp = function(other) {
return this.property === other.property;
};
AST_DotHash.prototype.shallow_cmp = function(other) {
return this.property === other.property;
};
AST_Unary.prototype.shallow_cmp = function(other) {
return this.operator === other.operator;
};
AST_Binary.prototype.shallow_cmp = function(other) {
return this.operator === other.operator;
};
AST_Conditional.prototype.shallow_cmp = pass_through;
AST_Array.prototype.shallow_cmp = pass_through;
AST_Object.prototype.shallow_cmp = pass_through;
AST_ObjectProperty.prototype.shallow_cmp = pass_through;
AST_ObjectKeyVal.prototype.shallow_cmp = function(other) {
return this.key === other.key;
};
AST_ObjectSetter.prototype.shallow_cmp = function(other) {
return this.static === other.static;
};
AST_ObjectGetter.prototype.shallow_cmp = function(other) {
return this.static === other.static;
};
AST_ConciseMethod.prototype.shallow_cmp = function(other) {
return this.static === other.static && this.is_generator === other.is_generator && this.async === other.async;
};
AST_Class.prototype.shallow_cmp = function(other) {
return (this.name == null ? other.name == null : this.name === other.name) && (this.extends == null ? other.extends == null : this.extends === other.extends);
};
AST_ClassProperty.prototype.shallow_cmp = function(other) {
return this.static === other.static;
};
AST_Symbol.prototype.shallow_cmp = function(other) {
return this.name === other.name;
};
AST_NewTarget.prototype.shallow_cmp = pass_through;
AST_This.prototype.shallow_cmp = pass_through;
AST_Super.prototype.shallow_cmp = pass_through;
AST_String.prototype.shallow_cmp = function(other) {
return this.value === other.value;
};
AST_Number.prototype.shallow_cmp = function(other) {
return this.value === other.value;
};
AST_BigInt.prototype.shallow_cmp = function(other) {
return this.value === other.value;
};
AST_RegExp.prototype.shallow_cmp = function (other) {
return (
this.value.flags === other.value.flags
&& this.value.source === other.value.source
);
};
AST_Atom.prototype.shallow_cmp = pass_through;