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JoviDeCroockJoviDeCroock
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Remove a few deopts already
1 parent 48afd37 commit 3063894

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5 files changed

+135
-39
lines changed

5 files changed

+135
-39
lines changed

‎src/language/ast.ts

Lines changed: 3 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -85,7 +85,7 @@ export class Token {
8585
* Note: is undefined for punctuation tokens, but typed as string for
8686
* convenience in the parser.
8787
*/
88-
readonly value: string;
88+
readonly value: string | undefined;
8989

9090
/**
9191
* Tokens exist as nodes in a double-linked-list amongst all tokens
@@ -101,15 +101,14 @@ export class Token {
101101
end: number,
102102
line: number,
103103
column: number,
104-
value?: string,
104+
value: string | undefined,
105105
) {
106106
this.kind = kind;
107107
this.start = start;
108108
this.end = end;
109109
this.line = line;
110110
this.column = column;
111-
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
112-
this.value = value!;
111+
this.value = value;
113112
this.prev = null;
114113
this.next = null;
115114
}

‎src/language/blockString.ts

Lines changed: 10 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -31,12 +31,19 @@ export function dedentBlockStringLines(
3131
}
3232
}
3333

34+
if (lastNonEmptyLine === -1) {
35+
return [];
36+
}
37+
38+
firstNonEmptyLine = firstNonEmptyLine ?? 0;
39+
40+
const removeCommonIndentation = (line: string, i: number) =>
41+
i === 0 ? line : commonIndent && line ? line.substring(commonIndent) : line;
3442
return (
3543
lines
3644
// Remove common indentation from all lines but first.
37-
.map((line, i) => (i === 0 ? line : line.slice(commonIndent)))
38-
// Remove leading and trailing blank lines.
39-
.slice(firstNonEmptyLine ?? 0, lastNonEmptyLine + 1)
45+
.map(removeCommonIndentation)
46+
.slice(firstNonEmptyLine, lastNonEmptyLine + 1)
4047
);
4148
}
4249

‎src/language/lexer.ts

Lines changed: 117 additions & 31 deletions
Original file line numberDiff line numberDiff line change
@@ -38,7 +38,7 @@ export class Lexer {
3838
lineStart: number;
3939

4040
constructor(source: Source) {
41-
const startOfFileToken = new Token(TokenKind.SOF, 0, 0, 0, 0);
41+
const startOfFileToken = new Token(TokenKind.SOF, 0, 0, 0, 0, undefined);
4242

4343
this.source = source;
4444
this.lastToken = startOfFileToken;
@@ -174,11 +174,10 @@ function createToken(
174174
kind: TokenKind,
175175
start: number,
176176
end: number,
177-
value?: string,
177+
value: string | undefined,
178178
): Token {
179-
const line = lexer.line;
180-
const col = 1 + start - lexer.lineStart;
181-
return new Token(kind, start, end, line, col, value);
179+
const col = start - (lexer.lineStart - 1);
180+
return new Token(kind, start, end, lexer.line, col, value);
182181
}
183182

184183
/**
@@ -248,39 +247,123 @@ function readNextToken(lexer: Lexer, start: number): Token {
248247
//
249248
// Punctuator :: one of ! $ & ( ) ... : = @ [ ] { | }
250249
case 0x0021: // !
251-
return createToken(lexer, TokenKind.BANG, position, position + 1);
250+
return createToken(
251+
lexer,
252+
TokenKind.BANG,
253+
position,
254+
position + 1,
255+
undefined,
256+
);
252257
case 0x0024: // $
253-
return createToken(lexer, TokenKind.DOLLAR, position, position + 1);
258+
return createToken(
259+
lexer,
260+
TokenKind.DOLLAR,
261+
position,
262+
position + 1,
263+
undefined,
264+
);
254265
case 0x0026: // &
255-
return createToken(lexer, TokenKind.AMP, position, position + 1);
266+
return createToken(
267+
lexer,
268+
TokenKind.AMP,
269+
position,
270+
position + 1,
271+
undefined,
272+
);
256273
case 0x0028: // (
257-
return createToken(lexer, TokenKind.PAREN_L, position, position + 1);
274+
return createToken(
275+
lexer,
276+
TokenKind.PAREN_L,
277+
position,
278+
position + 1,
279+
undefined,
280+
);
258281
case 0x0029: // )
259-
return createToken(lexer, TokenKind.PAREN_R, position, position + 1);
282+
return createToken(
283+
lexer,
284+
TokenKind.PAREN_R,
285+
position,
286+
position + 1,
287+
undefined,
288+
);
260289
case 0x002e: // .
261290
if (
262291
body.charCodeAt(position + 1) === 0x002e &&
263292
body.charCodeAt(position + 2) === 0x002e
264293
) {
265-
return createToken(lexer, TokenKind.SPREAD, position, position + 3);
294+
return createToken(
295+
lexer,
296+
TokenKind.SPREAD,
297+
position,
298+
position + 3,
299+
undefined,
300+
);
266301
}
267302
break;
268303
case 0x003a: // :
269-
return createToken(lexer, TokenKind.COLON, position, position + 1);
304+
return createToken(
305+
lexer,
306+
TokenKind.COLON,
307+
position,
308+
position + 1,
309+
undefined,
310+
);
270311
case 0x003d: // =
271-
return createToken(lexer, TokenKind.EQUALS, position, position + 1);
312+
return createToken(
313+
lexer,
314+
TokenKind.EQUALS,
315+
position,
316+
position + 1,
317+
undefined,
318+
);
272319
case 0x0040: // @
273-
return createToken(lexer, TokenKind.AT, position, position + 1);
320+
return createToken(
321+
lexer,
322+
TokenKind.AT,
323+
position,
324+
position + 1,
325+
undefined,
326+
);
274327
case 0x005b: // [
275-
return createToken(lexer, TokenKind.BRACKET_L, position, position + 1);
328+
return createToken(
329+
lexer,
330+
TokenKind.BRACKET_L,
331+
position,
332+
position + 1,
333+
undefined,
334+
);
276335
case 0x005d: // ]
277-
return createToken(lexer, TokenKind.BRACKET_R, position, position + 1);
336+
return createToken(
337+
lexer,
338+
TokenKind.BRACKET_R,
339+
position,
340+
position + 1,
341+
undefined,
342+
);
278343
case 0x007b: // {
279-
return createToken(lexer, TokenKind.BRACE_L, position, position + 1);
344+
return createToken(
345+
lexer,
346+
TokenKind.BRACE_L,
347+
position,
348+
position + 1,
349+
undefined,
350+
);
280351
case 0x007c: // |
281-
return createToken(lexer, TokenKind.PIPE, position, position + 1);
352+
return createToken(
353+
lexer,
354+
TokenKind.PIPE,
355+
position,
356+
position + 1,
357+
undefined,
358+
);
282359
case 0x007d: // }
283-
return createToken(lexer, TokenKind.BRACE_R, position, position + 1);
360+
return createToken(
361+
lexer,
362+
TokenKind.BRACE_R,
363+
position,
364+
position + 1,
365+
undefined,
366+
);
284367
// StringValue
285368
case 0x0022: // "
286369
if (
@@ -313,7 +396,7 @@ function readNextToken(lexer: Lexer, start: number): Token {
313396
);
314397
}
315398

316-
return createToken(lexer, TokenKind.EOF, bodyLength, bodyLength);
399+
return createToken(lexer, TokenKind.EOF, bodyLength, bodyLength, undefined);
317400
}
318401

319402
/**
@@ -353,7 +436,7 @@ function readComment(lexer: Lexer, start: number): Token {
353436
TokenKind.COMMENT,
354437
start,
355438
position,
356-
body.slice(start + 1, position),
439+
body.substring(start + 1, position),
357440
);
358441
}
359442

@@ -454,7 +537,7 @@ function readNumber(lexer: Lexer, start: number, firstCode: number): Token {
454537
isFloat ? TokenKind.FLOAT : TokenKind.INT,
455538
start,
456539
position,
457-
body.slice(start, position),
540+
body.substring(start, position),
458541
);
459542
}
460543

@@ -515,13 +598,13 @@ function readString(lexer: Lexer, start: number): Token {
515598

516599
// Closing Quote (")
517600
if (code === 0x0022) {
518-
value += body.slice(chunkStart, position);
601+
value += body.substring(chunkStart, position);
519602
return createToken(lexer, TokenKind.STRING, start, position + 1, value);
520603
}
521604

522605
// Escape Sequence (\)
523606
if (code === 0x005c) {
524-
value += body.slice(chunkStart, position);
607+
value += body.substring(chunkStart, position);
525608
const escape =
526609
body.charCodeAt(position + 1) === 0x0075 // u
527610
? body.charCodeAt(position + 2) === 0x007b // {
@@ -593,7 +676,7 @@ function readEscapedUnicodeVariableWidth(
593676
throw syntaxError(
594677
lexer.source,
595678
position,
596-
`Invalid Unicode escape sequence: "${body.slice(
679+
`Invalid Unicode escape sequence: "${body.substring(
597680
position,
598681
position + size,
599682
)}".`,
@@ -635,7 +718,10 @@ function readEscapedUnicodeFixedWidth(
635718
throw syntaxError(
636719
lexer.source,
637720
position,
638-
`Invalid Unicode escape sequence: "${body.slice(position, position + 6)}".`,
721+
`Invalid Unicode escape sequence: "${body.substring(
722+
position,
723+
position + 6,
724+
)}".`,
639725
);
640726
}
641727

@@ -717,7 +803,7 @@ function readEscapedCharacter(lexer: Lexer, position: number): EscapeSequence {
717803
throw syntaxError(
718804
lexer.source,
719805
position,
720-
`Invalid character escape sequence: "${body.slice(
806+
`Invalid character escape sequence: "${body.substring(
721807
position,
722808
position + 2,
723809
)}".`,
@@ -755,7 +841,7 @@ function readBlockString(lexer: Lexer, start: number): Token {
755841
body.charCodeAt(position + 1) === 0x0022 &&
756842
body.charCodeAt(position + 2) === 0x0022
757843
) {
758-
currentLine += body.slice(chunkStart, position);
844+
currentLine += body.substring(chunkStart, position);
759845
blockLines.push(currentLine);
760846

761847
const token = createToken(
@@ -779,15 +865,15 @@ function readBlockString(lexer: Lexer, start: number): Token {
779865
body.charCodeAt(position + 2) === 0x0022 &&
780866
body.charCodeAt(position + 3) === 0x0022
781867
) {
782-
currentLine += body.slice(chunkStart, position);
868+
currentLine += body.substring(chunkStart, position);
783869
chunkStart = position + 1; // skip only slash
784870
position += 4;
785871
continue;
786872
}
787873

788874
// LineTerminator
789875
if (code === 0x000a || code === 0x000d) {
790-
currentLine += body.slice(chunkStart, position);
876+
currentLine += body.substring(chunkStart, position);
791877
blockLines.push(currentLine);
792878

793879
if (code === 0x000d && body.charCodeAt(position + 1) === 0x000a) {
@@ -849,6 +935,6 @@ function readName(lexer: Lexer, start: number): Token {
849935
TokenKind.NAME,
850936
start,
851937
position,
852-
body.slice(start, position),
938+
body.substring(start, position),
853939
);
854940
}

‎src/language/parser.ts

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -269,6 +269,7 @@ export class Parser {
269269
: this._lexer.token;
270270

271271
if (keywordToken.kind === TokenKind.NAME) {
272+
// eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check
272273
switch (keywordToken.value) {
273274
case 'schema':
274275
return this.parseSchemaDefinition();
@@ -296,6 +297,7 @@ export class Parser {
296297
);
297298
}
298299

300+
// eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check
299301
switch (keywordToken.value) {
300302
case 'query':
301303
case 'mutation':

‎src/utilities/stripIgnoredCharacters.ts

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -89,7 +89,9 @@ export function stripIgnoredCharacters(source: string | Source): string {
8989

9090
const tokenBody = body.slice(currentToken.start, currentToken.end);
9191
if (tokenKind === TokenKind.BLOCK_STRING) {
92-
strippedBody += printBlockString(currentToken.value, { minimize: true });
92+
strippedBody += printBlockString(currentToken.value ?? '', {
93+
minimize: true,
94+
});
9395
} else {
9496
strippedBody += tokenBody;
9597
}

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