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Fix leading comments added from previous node

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This fixes an issue that comments were added as leading comments
to expressions, which are not immediately folowing the comment.
This was also reported and fixed in espree, and is basically a port to
babylon. eslint/espree#256

this also fixes an issue in babel-eslint with certain rules babel/babel-eslint#289
This commit is contained in:
Daniel Tschinder
2016-04-23 12:24:20 +02:00
parent b926e401c6
commit 4bfececdad
4 changed files with 46 additions and 71 deletions
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18
src/parser/comments.js
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@@ -42,7 +42,7 @@ pp.processComment = function (node) {
let stack = this.state.commentStack;
let lastChild, trailingComments, i;
let lastChild, trailingComments, i, j;
if (this.state.trailingComments.length > 0) {
// If the first comment in trailingComments comes after the
@@ -93,8 +93,18 @@ pp.processComment = function (node) {
}
} else if (this.state.leadingComments.length > 0) {
if (last(this.state.leadingComments).end <= node.start) {
node.leadingComments = this.state.leadingComments;
this.state.leadingComments = [];
if (this.state.commentPreviousNode) {
for (j = 0; j < this.state.leadingComments.length; j++) {
if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) {
this.state.leadingComments.splice(j, 1);
j--;
}
}
}
if (this.state.leadingComments.length > 0) {
node.leadingComments = this.state.leadingComments;
this.state.leadingComments = [];
}
} else {
// https://github.com/eslint/espree/issues/2
//
@@ -131,6 +141,8 @@ pp.processComment = function (node) {
}
}
this.state.commentPreviousNode = node;
if (trailingComments) {
if (trailingComments.length && trailingComments[0].start >= node.start && last(trailingComments).end <= node.end) {
node.innerComments = trailingComments;