Currently, an open brace without a corresponding brace will emit this confusing error message:
> Expected "!", "$", "&", "(", "*", "+", ".", "/", "/*", "//", ";", "?", character class, code block, comment, end of line, identifier, literal, or whitespace but "{" found.
This change adds an error case to the grammar to make it clear what the problem is.
* Do not indent backtick quoted strings in initializer or rule action code blocks
* Use const instead of var for ESLint happiness
* Fix ESLint issues for double quotes and indent6
This fixes the following ESLint error, which started to appear after
eslint/eslint#7424 was fixed:
/Users/dmajda/Programming/PEG.js/pegjs/lib/compiler/js.js
37:17 error Unnecessary escape character: \] no-useless-escape
This should fix broken Travis CI builds:
https://travis-ci.org/pegjs/pegjs/builds/180092802
Generating AMD/UMD dependencies lead to an error:
$ bin/pegjs --format amd --dependency $:jquery examples/arithmetics.pegjs
dependencyIds is not defined
$ bin/pegjs --format umd --dependency $:jquery examples/arithmetics.pegjs
dependencyIds is not defined
This commit fixes the problem, which was caused by a mistake done in
d2569b9bf3.
The "global-require" rule is disabled in ESLint configuration used by
PEG.js, but the idea is not bad, so let's make all static "require"
calls global.
Follow-up to #407.
Running ESLint on generated code with the configuration used on PEG.js
itself produces a lot of errors. This commit fixes some unnecessary ones
caught by these rules:
- max-len
- new-cap
- newline-before-return
- no-unused-vars
See also 5dd8e797f7.
Follow-up to #407.
The idea behind linting lib/parser.js was that it would improve quality
of code generated by PEG.js in general. However, there is a couple of
problems with it:
1. Code in lib/parser.js is ES5 while the rest of the code is ES2015.
This would mean a separate ESLint configuration and a separate set
of code style rules just for lib/parser.js once code style checks
are added.
2. Code in lib/parser.js is generated. This means that even today it
violates checks like "no-unused-var", which have to be disabled.
This would get worse once code style checks are added, again
requiring a separate ESLint configuration just for lib/parser.js.
3. Linting lib/parser.js checks only small portion of possible code
generator output. For example, code generated when optimizing for
size or when tracing is not checked at all. Thus, linting
lib/parser.js gives a false sense of security.
Because of these problems I decided not to lint lib/parser.js at all and
rely on ad-hoc linting of parser files produced by PEG.js with ignoring
false-positives. I consider this more of a pragmatic cost vs. benefits
decision than a principial one.
Part of #407.
Before this commit, continuation lines of multi-line values in variable
declaration initializers were aligned with the variable name:
let foo = {
a: 5,
b: 6
};
This was highly irregular, maintenance intensive, and made declarations
look different from assignments.
This commit changes the indentation to be more regular and similar to
assignments:
let foo = {
a: 5,
b: 6
};
The lib/parser.js file is a CommonJS module like all the other files in
lib/, so setting the environment explicitly is not needed. Besides, the
environment set by "eslint-env" was wrong (since transitioning from the
AMD format).
Use one var/let/const per variable, but only for initialized variables.
Uninitialized variables are still grouped into one var/let/const
declaration as I don't see any value in separating them. This approach
reflects the fact that initialized and uninitialized var/let/const
declarations are really two different things.
See #443.
The for-in statement in JavaScript iterates also over inherited
properties. This is typically not desired and requires adding a
check using Object.prototype.hasOwnProperty inside the loop.
This commit replaces all for-in statements and related checks inside
them with iteration over Object.keys(...). The iteration is performed
using either Array.prototype.forEach of a plain for loop.
felix
Futago-za Ryuu
Alan Mimms
Mingun
fatfisz
David Majda