token: splat (@), for PS splatting

Compiler.ps1

···
 	ATTR_NAME          # [a-zA-Z0-9_-\.]+
 	ATTR_VALUE         # plain identifier
 	ATTR_VALUE_SCRIPTBLOCK # { ... }
+	ATTR_SPLAT # @VariableName
 	
 	EOF
 	
···
 				
 				$this.State = [ElementState]::AFTER_ATTRIBUTE_VALUE
 				return [Token]::new( [TokenType]::ATTR_VALUE_SCRIPTBLOCK , $this.PopQuotedAttrValue() )
+			}
+			
+			'@' {
+				$this.PopChar() # drop @
+				
+				if ($this.State -notin
+					[ElementState]::AFTER_TAG,
+					[ElementState]::AFTER_ATTRIBUTE_NAME,
+					[ElementState]::AFTER_ATTRIBUTE_VALUE
+				) {
+					$this.Die('@')
+				}
+				
+				return [Token]::new( [TokenType]::ATTR_SPLAT, $this.PopIdentifier() )
 			}
 			
 			'[a-zA-Z0-9_-]' {

Tests.ps1

···
 			$VOID_ELEMENT_CLOSE,
 			$EOF
 		)
+	},
+	@{
+		Name = "Splat"
+		Input = '<div attr1="one two" @Splat_Me three></div>'
+		Expect = @(
+			$OPEN_ELEMENT_START
+			(_tag_token div)
+			[Token]::new(
+				[TokenType]::ATTR_NAME,
+				'attr1'
+			),
+			$EQUALS
+			[Token]::new(
+				[TokenType]::ATTR_VALUE,
+				'one two'
+			),
+			[Token]::new(
+				[TokenType]::ATTR_SPLAT,
+				'Splat_Me'
+			),
+			[Token]::new(
+				[TokenType]::ATTR_NAME,
+				'three'
+			),
+			$CLOSE_ELEMENT,
+			$OPEN_ELEMENT_END,
+			(_tag_token div),
+			$CLOSE_ELEMENT,
+			$EOF
+		)
 	}
 )