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E9 [css-values-4] Better define how math functions combine their argumen… · w3c/csswg-drafts@d0e0f40 · GitHub
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committedFeb 29, 2024
[css-values-4] Better define how math functions combine their argument types. #10017
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‎css-values-4/Overview.bs

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@@ -3147,9 +3147,9 @@ Comparison Functions: ''min()'', ''max()'', and ''clamp()''</h3>
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For all three functions,
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the argument [=calculations=] can resolve to any <<number>>, <<dimension>>, or <<percentage>>,
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but must have the <em>same</em> [=determine the type of a calculation|type=],
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but must have a [=consistent type=]
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or else the function is invalid;
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the result will have the same [=CSSNumericValue/type=] as the arguments.
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the result's type will be the [=consistent type=].
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<div class="example">
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@@ -3240,9 +3240,9 @@ Stepped Value Functions: ''round()'', ''mod()'', and ''rem()''</h3>
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rounded according to the rounding strategy,
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to the nearest integer multiple of B either above or below A.
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The argument [=calculations=] can resolve to any <<number>>, <<dimension>>, or <<percentage>>,
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but must have the <em>same</em> [=determine the type of a calculation|type=],
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but must have a [=consistent type=]
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or else the function is invalid;
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the result will have the same [=CSSNumericValue/type=] as the arguments.
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the result's type will be the [=consistent type=].
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If A is exactly equal to an integer multiple of B,
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''round()'' resolves to A exactly
@@ -3503,7 +3503,7 @@ Trigonometric Functions: ''sin()'', ''cos()'', ''tan()'', ''asin()'', ''acos()''
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The <dfn lt="atan2()">atan2(A, B)</dfn> function
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contains two comma-separated [=calculations=], A and B.
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A and B can resolve to any <<number>>, <<dimension>>, or <<percentage>>,
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but must have the <em>same</em> [=determine the type of a calculation|type=],
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but must have a [=consistent type=]
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or else the function is invalid.
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The function returns the <<angle>>
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between the positive X-axis and the point (B,A).
@@ -3706,9 +3706,9 @@ Exponential Functions: ''pow()'', ''sqrt()'', ''hypot()'', ''log()'', ''exp()''
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(That is,
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the square root of the sum of the squares of its arguments.)
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The argument [=calculations=] can resolve to any <<number>>, <<dimension>>, or <<percentage>>,
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but must have the <em>same</em> [=determine the type of a calculation|type=],
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but must have a [=consistent type=]
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or else the function is invalid;
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the result will have the same [=CSSNumericValue/type=] as the arguments.
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the result's type will be the [=consistent type=].
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<details class=note>
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<summary>Why does ''hypot()'' allow dimensions (values with units), but ''pow()'' and ''sqrt()'' only work on numbers?</summary>
@@ -4321,6 +4321,12 @@ Type Checking</h3>
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</dl>
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</div>
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<div algorithm>
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Two or more calculations have a <dfn export local-lt="consistent">consistent type</dfn>
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if [=add two types/adding the types=] doesn't result in failure.
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The [=consistent type=] is the result of the type addition.
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</div>
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[=Math functions=] themselves have [=CSSNumericValue/types=],
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according to their contained [=calculations=]:
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