Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

feat(experimental-utils): extract ast-utils' predicates' helpers #3976

Merged
merged 1 commit into from Oct 14, 2021
Merged

feat(experimental-utils): extract ast-utils' predicates' helpers #3976

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
37 changes: 37 additions & 0 deletions packages/experimental-utils/src/ast-utils/helpers.ts
View file
Open in desktop
@@ -0,0 +1,37 @@
import { AST_NODE_TYPES, TSESTree } from '../ts-estree';

export const isNodeOfType =
<NodeType extends AST_NODE_TYPES>(nodeType: NodeType) =>
(
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeType } =>
node?.type === nodeType;

export const isNodeOfTypes =
<NodeTypes extends readonly AST_NODE_TYPES[]>(nodeTypes: NodeTypes) =>
(
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeTypes[number] } =>
!!node && nodeTypes.includes(node.type);

type ObjectEntry<BaseType> = [keyof BaseType, BaseType[keyof BaseType]];
type ObjectEntries<BaseType> = Array<ObjectEntry<BaseType>>;
export const isNodeOfTypeWithConditions = <
NodeType extends AST_NODE_TYPES,
Conditions extends Partial<TSESTree.Node & { type: NodeType }>,
>(
nodeType: NodeType,
conditions: Conditions,
): ((
node: TSESTree.Node | null | undefined,
) => node is TSESTree.Node & { type: NodeType } & Conditions) => {
const entries = Object.entries(conditions) as ObjectEntries<
TSESTree.Node & { type: NodeType }
>;

return (
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeType } & Conditions =>
node?.type === nodeType &&
entries.every(([key, value]) => node[key] === value);
};
40 changes: 5 additions & 35 deletions packages/experimental-utils/src/ast-utils/predicates.ts
View file
Open in desktop
@@ -1,40 +1,10 @@
import { AST_NODE_TYPES, AST_TOKEN_TYPES, TSESTree } from '../ts-estree';

const isNodeOfType =
<NodeType extends AST_NODE_TYPES>(nodeType: NodeType) =>
(
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeType } =>
node?.type === nodeType;

const isNodeOfTypes =
<NodeTypes extends readonly AST_NODE_TYPES[]>(nodeTypes: NodeTypes) =>
(
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeTypes[number] } =>
!!node && nodeTypes.includes(node.type);

type ObjectEntry<BaseType> = [keyof BaseType, BaseType[keyof BaseType]];
type ObjectEntries<BaseType> = Array<ObjectEntry<BaseType>>;
const isNodeOfTypeWithConditions = <
NodeType extends AST_NODE_TYPES,
Conditions extends Partial<TSESTree.Node & { type: NodeType }>,
>(
nodeType: NodeType,
conditions: Conditions,
): ((
node: TSESTree.Node | null | undefined,
) => node is TSESTree.Node & { type: NodeType } & Conditions) => {
const entries = Object.entries(conditions) as ObjectEntries<
TSESTree.Node & { type: NodeType }
>;

return (
node: TSESTree.Node | null | undefined,
): node is TSESTree.Node & { type: NodeType } & Conditions =>
node?.type === nodeType &&
entries.every(([key, value]) => node[key] === value);
};
import {
isNodeOfType,
isNodeOfTypes,
isNodeOfTypeWithConditions,
} from './helpers';

function isOptionalChainPunctuator(
token: TSESTree.Token,
Expand Down