[css-values-4] Remove lingering reference to <<integer>>. Remove now-redundant instructions for determining the type.

Author: tabatkins

css-values-4/Overview.bs

@@ -1604,8 +1604,7 @@ Mathematical Expressions: ''calc()'', ''min()'', and ''max()''</h3>
 	<<angle>>,
 	<<time>>,
 	<<percentage>>,
-	<<number>>, or
-	<<integer>>
+	or <<number>>
 	values are allowed.
 	Components of a [=math function=] can be literal values,
 	other [=math functions=],
@@ -1698,42 +1697,24 @@ Syntax</h4>
 <h4 id='calc-type-checking'>
 Type Checking</h4>
 
-	A [=math function=] has a <dfn>resolved type</dfn>, which is one of
-	<<length>>,
-	<<frequency>>,
-	<<angle>>,
-	<<time>>,
-	<<percentage>>,
-	or <<number>>.
-	It can be used anywhere its [=resolved type=] is allowed.
+	A [=math function=] can be many possible types,
+	such as <<length>>, <<number>>, etc.,
+	depending on the expression it contains,
+	as defined in [[#type-checking-exprs]].
+	It can be used anywhere a value of that type is allowed.
+
+	<div class=example>
+		For example, the 'width' property accepts <<length>> values,
+		so a [=math function=] that resolves to a <<length>>,
+		such as ''calc(5px + 1em)'',
+		can be used in 'width'.
+	</div>
 
-	Additionally, [=math function=] whose [=resolved type=] is <<number>>
+	Additionally, [=math function=] that resolve to <<number>>
 	can be used in any place that only accepts <<integer>>.
 	(It gets rounded to the nearest integer,
 	as specified in [[#calc-range]].)
 
-	The <a>resolved type</a> must be valid for where the [=math function=] is placed;
-	otherwise, the expression is invalid.
-
-	The <a>resolved type</a> of a [=math function=] is determined by the values and calculations it contains:
-
-	* <<number-token>>s are of type <<number>> or <<integer>>.
-	* A <<dimension-token>>’s type is given by its unit
-		(''cm'' is <<length>>, ''deg'' is <<angle>>, etc.).
-	* Functions’ types are defined by their specification
-		(nested ''calc()'' has its type determined by its own contents,
-		''attr()''’s type is determined by its <<type-or-unit>> argument,
-		etc).
-	* Larger calculations’ types are determined by the types of their arguments
-		and the rules for their operation,
-		as defined below.
-
-	A ''calc()'' expression's <a>resolved type</a> is the <a>resolved type</a> of the calculation it contains.
-	The <a>resolved type</a> of a ''min()'' or ''max()'' expression
-	is the <a>resolved type</a> of any of the calculations it contains.
-	If a ''min()'' or ''max()'' expression's arguments have different <a>resolved types</a>,
-	the expression is invalid.
-
 	Note: Because <<number-token>>s are always interpreted as <<number>>s or <<integer>>s,
 	"unitless 0" <<length>>s aren't supported in [=math functions=].
 	That is, ''width: calc(0 + 5px);'' is invalid,
@@ -1929,7 +1910,7 @@ Range Checking</h4>
 	Note: This requires all contexts accepting ''calc()''
 	to define their allowable values as a closed (not open) interval.
 
-	Additionally, if a [=math function=] whose [=resolved type=] is <<number>>
+	Additionally, if a [=math function=] that resolves to <<number>>
 	is used somewhere that only accepts <<integer>>,
 	the [=computed value=] and [=used value=] are rounded to the nearest integer,
 	in the same manner as clamping, above.