Syntax of Range Expressions (SICStus Prolog)

10.9.16.2 Syntax of Range Expressions

`IntegerRange`	::= `{integer,…,integer}`
	\| `IntConstant` `..` `IntConstant`
	\| `IntegerRange` `/\` `IntegerRange`
	\| `IntegerRange` `\/` `IntegerRange`
	\| `\` `IntegerRange`

`IntConstant`	::= integer
	\| `inf`	{ minus infinity }
	\| `sup`	{ plus infinity }

`RealRange`	::= `RealConstant` `..` `RealConstant`

`RealConstant`	::= float
	\| `finf`	{ minus infinity }
	\| `fsup`	{ plus infinity }

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