31 lines
930 B
TypeScript
31 lines
930 B
TypeScript
import { Value, preserves } from '@preserves/core';
|
|
|
|
export type Input = Value<never>;
|
|
|
|
export function isValidToken(s: string, allowLeadingUnderscore = false): boolean {
|
|
if (allowLeadingUnderscore) {
|
|
return /^[a-zA-Z_][a-zA-Z_0-9]*$/.test(s);
|
|
} else {
|
|
return /^[a-zA-Z][a-zA-Z_0-9]*$/.test(s);
|
|
}
|
|
}
|
|
|
|
export const ANDSYM = Symbol.for('&');
|
|
export const DOT = Symbol.for('.');
|
|
export const DOTDOTDOT = Symbol.for('...');
|
|
export const EQUALS = Symbol.for('=');
|
|
export const ORSYM = Symbol.for('/');
|
|
|
|
export * from './schemaschema';
|
|
import { Schema, Pattern, $definitions } from './schemaschema';
|
|
|
|
export type Environment = Array<Schema>;
|
|
|
|
export function lookup(env: Environment, name: symbol): Pattern {
|
|
for (const s of env) {
|
|
const p = Schema._.details(s).get($definitions).get(name);
|
|
if (p !== void 0) return p;
|
|
}
|
|
throw new Error(preserves`Schema: unbound name ${name}`);
|
|
}
|