match_query: use new type for parse errors

assets/js/query/date.ts

@@ -1,4 +1,4 @@
-import { FieldMatcher, RangeEqualQualifier } from './types';
+import { FieldMatcher, ParseError, RangeEqualQualifier } from './types';
 
 type Year = number;
 type Month = number;
@@ -55,7 +55,7 @@ function makeRelativeDateMatcher(dateVal: string, qual: RangeEqualQualifier): Fi
     return makeMatcher(bottomDate, topDate, qual);
   }
 
-  throw new Error(`Cannot parse date string: ${dateVal}`);
+  throw new ParseError(`Cannot parse date string: ${dateVal}`);
 }
 
 function makeAbsoluteDateMatcher(dateVal: string, qual: RangeEqualQualifier): FieldMatcher {
@@ -108,12 +108,12 @@ function makeAbsoluteDateMatcher(dateVal: string, qual: RangeEqualQualifier): Fi
       localDateVal = localDateVal.substring(componentMatch[0].length);
     }
     else {
-      throw new Error(`Cannot parse date string: ${origDateVal}`);
+      throw new ParseError(`Cannot parse date string: ${origDateVal}`);
     }
   }
 
   if (localDateVal.length > 0) {
-    throw new Error(`Cannot parse date string: ${origDateVal}`);
+    throw new ParseError(`Cannot parse date string: ${origDateVal}`);
   }
 
   // Apply the user-specified time zone offset. The JS Date constructor
@@ -136,7 +136,7 @@ export function makeDateMatcher(dateVal: string, qual: RangeEqualQualifier): Fie
   try {
     return makeAbsoluteDateMatcher(dateVal, qual);
   }
-  catch (_) {
+  catch {
     return makeRelativeDateMatcher(dateVal, qual);
   }
 }

assets/js/query/lex.ts

@@ -1,5 +1,5 @@
 import { assertNotNull, assertNotUndefined } from '../utils/null';
-import { AstMatcher, TokenList } from './types';
+import { AstMatcher, ParseError, TokenList } from './types';
 
 type TokenName = string;
 type Token = [TokenName, RegExp];
@@ -181,7 +181,7 @@ export function generateLexArray(searchStr: string, parseTerm: ParseTerm): Token
   pushTerm();
 
   if (opQueue.indexOf('rparen') !== -1 || opQueue.indexOf('lparen') !== -1) {
-    throw new Error('Mismatched parentheses.');
+    throw new ParseError('Mismatched parentheses.');
   }
 
   // Concatenatte remaining operators to the token stack.

assets/js/query/parse.ts

@@ -1,5 +1,5 @@
 import { matchAll, matchAny, matchNone, matchNot } from './boolean';
-import { AstMatcher, TokenList } from './types';
+import { AstMatcher, ParseError, TokenList } from './types';
 
 export function parseTokens(lexicalArray: TokenList): AstMatcher {
   const operandStack: AstMatcher[] = [];
@@ -16,7 +16,7 @@ export function parseTokens(lexicalArray: TokenList): AstMatcher {
       const op1 = operandStack.pop();
 
       if (typeof op1 === 'undefined' || typeof op2 === 'undefined') {
-        throw new Error('Missing operand.');
+        throw new ParseError('Missing operand.');
       }
 
       if (token === 'and_op') {
@@ -39,7 +39,7 @@ export function parseTokens(lexicalArray: TokenList): AstMatcher {
   });
 
   if (operandStack.length > 1) {
-    throw new Error('Missing operator.');
+    throw new ParseError('Missing operator.');
   }
 
   const op1 = operandStack.pop();

assets/js/query/types.ts

@@ -8,3 +8,5 @@ export type FieldMatcher = (value: FieldValue, name: FieldName, documentId: numb
 
 export type AstMatcher = (e: HTMLElement) => boolean;
 export type TokenList = (string | AstMatcher)[];
+
+export class ParseError extends Error {}