Refactor Lexer #3115
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Refactor Lexer #3115
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May 19, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 19, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 19, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 19, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 21, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 21, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 27, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 27, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
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leebyron
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May 28, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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May 28, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
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@leebyron It's hard to review since a lot of changes happened simultaneously. |
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I'm happy to factor some things out if it helps |
@leebyron Thanks, a lot it would be helpful. |
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@IvanGoncharov - Applied most of your suggested changes and a few other related clarifying changes in 0d6a096 |
The lexer needed some cleanup, I found myself doing this as part of a Unicode RFC, but factoring all that out to make the Unicode RFC PR easier to follow. * Always use hexadecimal form for code values. * Remove use of `isNaN` for checking source over-reads. * Defines `isSourceCharacter` * Add more documentation and comments, also replaces regex with lexical grammar * Simplifies error messages * Adds additional tests
Co-authored-by: Ivan Goncharov <[email protected]>
leebyron
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Jun 3, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Jun 3, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
IvanGoncharov
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PR: polish 💅
leebyron
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Jun 3, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Jun 3, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Jul 1, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Jul 1, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Jul 1, 2021
Depends on #3115 Implements RFC at graphql/graphql-spec#849. * Replaces `isSourceCharacter` with `isUnicodeScalarValue` * Adds `isSupplementaryCodePoint`, used in String, BlockStrings, and Comments to ensure correct lexing of JavaScript's UTF-16 source. * Updates `printCodePointAt` to correctly print supplementary code points. * Adds variable-width Unicode escape sequences * Adds explicit support for legacy JSON-style fixed-width Unicode escape sequence surrogate pairs. * Adds `printString` to no longer rely on `JSON.stringify`. Borrows some implementation details from Node.js internals for string printing. Implements: > When producing a {StringValue}, implementations should use escape sequences to > represent non-printable control characters (U+0000 to U+001F and U+007F to > U+009F). Other escape sequences are not necessary, however an implementation may > use escape sequences to represent any other range of code points. Closes #2449 Co-authored-by: Andreas Marek <[email protected]>
leebyron
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Sep 1, 2025
Depends on #3115 Implements graphql/graphql-spec#794 Adds: * DOT punctuator in lexer * Improvements to lexer errors around misuse of `.` * Minor improvement to parser core which simplified this addition * `SchemaCoordinate` node and `isSchemaCoodinate()` predicate * Support in `print()` and `visit()` * Added function `parseSchemaCoordinate()` since it is a parser entry point. * Added function `resolveSchemaCoordinate()` and `resolveASTSchemeCoordinate()` which implement the semantics (name mirrored from `buildASTSchema`) as well as the return type `GraphQLSchemaElement` --------- Co-authored-by: Benjie Gillam <[email protected]> Co-authored-by: Mark Larah <[email protected]> Co-authored-by: Yaacov Rydzinski <[email protected]>
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The lexer needed some cleanup, I found myself doing this as part of a Unicode RFC, but factoring all that out to make the Unicode RFC PR easier to follow.
isNaNfor checking source over-reads.isSourceCharacter