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url: use foreach-style C++ loop #23138

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@tniessen tniessen commented Sep 28, 2018

Change URL::parse to use a range-based for loop for better readability.

CI on commit before opening PR: https://ci.nodejs.org/job/node-test-commit/21840/

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. whatwg-url Issues and PRs related to the WHATWG URL implementation. labels Sep 28, 2018
src/node_url.h Outdated
@@ -159,9 +159,9 @@ class URL {

std::string path() const {
std::string ret;
for (auto i = context_.path.begin(); i != context_.path.end(); i++) {
for (const auto& i : context_.path) {
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Can we replace auto with std::string?

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I would ask not to.
As per the discussion in #23028

src/node_url.h Outdated
ret += '/';
ret += *i;
ret += i;
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There are two possible minor improvements.
One is to use stringstream
The other is to hint to the compiler the the / always goes with the next part:

ret += '/' + i;

YMMV

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Theoretically this should be the best solution, but I'm not sure I like it:

  return std::accumulate(cbegin(_path), cend(_path), std::string(), 
                         [](auto const& a, auto const& b) { return a + '/' + b; });

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I’d prefer std::accumulate over stringstream but otherwise the suggestions in these two comments seem fine (as does the current state of the PR)

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The idea behind using a range-based for loop was to improve readability, and using accumulate for such a trivial thing seems like doing the opposite.

src/node_url.h Outdated
ret += '/';
ret += *i;
ret += i;
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I’d prefer std::accumulate over stringstream but otherwise the suggestions in these two comments seem fine (as does the current state of the PR)

@tniessen tniessen force-pushed the url-use-foreach-loop branch from bcad6b4 to b3f40ee Compare September 28, 2018 09:37
@tniessen tniessen force-pushed the url-use-foreach-loop branch from b3f40ee to 2440d9c Compare September 28, 2018 09:37
src/node_url.h Outdated
for (auto i = context_.path.begin(); i != context_.path.end(); i++) {
ret += '/';
ret += *i;
for (const std::string& i : context_.path) {
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Maybe rename it to something like path_element?
To me, i means "index" and that's how it's always used in JS.

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tniessen commented Sep 29, 2018

@addaleax
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addaleax commented Oct 1, 2018

Landed in 1d9ec04

@addaleax addaleax closed this Oct 1, 2018
addaleax pushed a commit that referenced this pull request Oct 1, 2018
PR-URL: #23138
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
targos pushed a commit that referenced this pull request Oct 1, 2018
PR-URL: #23138
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
targos pushed a commit that referenced this pull request Oct 3, 2018
PR-URL: #23138
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>
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