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More concise improvements for add() and subtract() #34432

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merged 5 commits into from
Jul 27, 2021

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@ffoodd ffoodd commented Jul 6, 2021

Better fix for #33953, improves #34047

@oliwerAR Back to this, made a quick SassMeister to play with.

From my understanding, brackets are required on subtract() second argument only when it contains an addition, am I right? Thinking so, I also checked that second argument contains a + sign to only output brackets when necessary.

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oliwerAR commented Jul 6, 2021

@ffoodd I'm afraid that's not right. The second argument of substract should be put in brackets always when it's a complex expression (not type-of number), whatever sign it contains.

Simple match:
a - b = ?
a = 100

b = 10 + 1 = 11
100 - (10 + 1) = 100 - 10 - 1 = 89

b = 10 - 1 = 9
100 - (10 - 1) = 100 - 10 + 1 = 91

The results of your last two tests:

    font-size: subtract(1vw, $add); =  font-size: calc(1vw - (1rem + 1em));
    font-size: subtract(1vw, $subtract); =  font-size: calc(1vw - 1rem - 1em);

are mathematically equal, though obviously the should not be.

@ffoodd ffoodd force-pushed the main-fod-subtract-improvements branch from 24784ae to 4d19246 Compare July 6, 2021 10:20
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ffoodd commented Jul 6, 2021

Just updated the PR and made another SassMeister. Should be better :)

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oliwerAR commented Jul 7, 2021

@ffoodd This version seams to be working fine (mathematically correct).

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XhmikosR commented Jul 8, 2021

Just to confirm @ffoodd did you check the dist file changes? Does everything look good now?

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ffoodd commented Jul 12, 2021

@XhmikosR Yes, we only had 5 occurrences of unneeded parenthesis ((x + (a + b)) for all of them). AFAIK it's safe for our core, and should be for other cases as demonstrated in Sassmeister.

@XhmikosR XhmikosR requested a review from mdo July 12, 2021 14:11
@ffoodd ffoodd changed the title refactor(functions): add() and subtract() more concise improvements More concise improvements for add() and subtract() Jul 12, 2021
@XhmikosR XhmikosR changed the title More concise improvements for add() and subtract() More concise improvements for add() and subtract() Jul 27, 2021
@XhmikosR XhmikosR merged commit 8536474 into main Jul 27, 2021
@XhmikosR XhmikosR deleted the main-fod-subtract-improvements branch July 27, 2021 04:48
marvin-hinkley-vortx pushed a commit to Vortx-Inc/bootstrap that referenced this pull request Aug 18, 2021
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4 participants