Scheme: Fixed function and function-like false positives (#2611)

components/prism-scheme.js

@@ -21,25 +21,25 @@ Prism.languages.scheme = {
 	'lambda-parameter': [
 		// https://www.cs.cmu.edu/Groups/AI/html/r4rs/r4rs_6.html#SEC30
 		{
-			pattern: /(\(lambda\s+)(?:[^|()'\s]+|\|(?:[^\\|]|\\.)*\|)/,
+			pattern: /((?:^|[^'`#])\(lambda\s+)(?:[^|()'\s]+|\|(?:[^\\|]|\\.)*\|)/,
 			lookbehind: true
 		},
 		{
-			pattern: /(\(lambda\s+\()[^()']+/,
+			pattern: /((?:^|[^'`#])\(lambda\s+\()[^()']+/,
 			lookbehind: true
 		}
 	],
 	'keyword': {
-		pattern: /(\()(?:begin|case(?:-lambda)?|cond(?:-expand)?|define(?:-library|-macro|-record-type|-syntax|-values)?|defmacro|delay(?:-force)?|do|else|export|except|guard|if|import|include(?:-ci|-library-declarations)?|lambda|let(?:rec)?(?:-syntax|-values|\*)?|let\*-values|only|parameterize|prefix|(?:quasi-?)?quote|rename|set!|syntax-(?:case|rules)|unless|unquote(?:-splicing)?|when)(?=[()\s]|$)/,
+		pattern: /((?:^|[^'`#])\()(?:begin|case(?:-lambda)?|cond(?:-expand)?|define(?:-library|-macro|-record-type|-syntax|-values)?|defmacro|delay(?:-force)?|do|else|export|except|guard|if|import|include(?:-ci|-library-declarations)?|lambda|let(?:rec)?(?:-syntax|-values|\*)?|let\*-values|only|parameterize|prefix|(?:quasi-?)?quote|rename|set!|syntax-(?:case|rules)|unless|unquote(?:-splicing)?|when)(?=[()\s]|$)/,
 		lookbehind: true
 	},
 	'builtin': {
 		// all functions of the base library of R7RS plus some of built-ins of R5Rs
-		pattern: /(\()(?:abs|and|append|apply|assoc|ass[qv]|binary-port\?|boolean=?\?|bytevector(?:-append|-copy|-copy!|-length|-u8-ref|-u8-set!|\?)?|caar|cadr|call-with-(?:current-continuation|port|values)|call\/cc|car|cdar|cddr|cdr|ceiling|char(?:->integer|-ready\?|\?|<\?|<=\?|=\?|>\?|>=\?)|close-(?:input-port|output-port|port)|complex\?|cons|current-(?:error|input|output)-port|denominator|dynamic-wind|eof-object\??|eq\?|equal\?|eqv\?|error|error-object(?:-irritants|-message|\?)|eval|even\?|exact(?:-integer-sqrt|-integer\?|\?)?|expt|features|file-error\?|floor(?:-quotient|-remainder|\/)?|flush-output-port|for-each|gcd|get-output-(?:bytevector|string)|inexact\??|input-port(?:-open\?|\?)|integer(?:->char|\?)|lcm|length|list(?:->string|->vector|-copy|-ref|-set!|-tail|\?)?|make-(?:bytevector|list|parameter|string|vector)|map|max|member|memq|memv|min|modulo|negative\?|newline|not|null\?|number(?:->string|\?)|numerator|odd\?|open-(?:input|output)-(?:bytevector|string)|or|output-port(?:-open\?|\?)|pair\?|peek-char|peek-u8|port\?|positive\?|procedure\?|quotient|raise|raise-continuable|rational\?|rationalize|read-(?:bytevector|bytevector!|char|error\?|line|string|u8)|real\?|remainder|reverse|round|set-c[ad]r!|square|string(?:->list|->number|->symbol|->utf8|->vector|-append|-copy|-copy!|-fill!|-for-each|-length|-map|-ref|-set!|\?|<\?|<=\?|=\?|>\?|>=\?)?|substring|symbol(?:->string|\?|=\?)|syntax-error|textual-port\?|truncate(?:-quotient|-remainder|\/)?|u8-ready\?|utf8->string|values|vector(?:->list|->string|-append|-copy|-copy!|-fill!|-for-each|-length|-map|-ref|-set!|\?)?|with-exception-handler|write-(?:bytevector|char|string|u8)|zero\?)(?=[()\s]|$)/,
+		pattern: /((?:^|[^'`#])\()(?:abs|and|append|apply|assoc|ass[qv]|binary-port\?|boolean=?\?|bytevector(?:-append|-copy|-copy!|-length|-u8-ref|-u8-set!|\?)?|caar|cadr|call-with-(?:current-continuation|port|values)|call\/cc|car|cdar|cddr|cdr|ceiling|char(?:->integer|-ready\?|\?|<\?|<=\?|=\?|>\?|>=\?)|close-(?:input-port|output-port|port)|complex\?|cons|current-(?:error|input|output)-port|denominator|dynamic-wind|eof-object\??|eq\?|equal\?|eqv\?|error|error-object(?:-irritants|-message|\?)|eval|even\?|exact(?:-integer-sqrt|-integer\?|\?)?|expt|features|file-error\?|floor(?:-quotient|-remainder|\/)?|flush-output-port|for-each|gcd|get-output-(?:bytevector|string)|inexact\??|input-port(?:-open\?|\?)|integer(?:->char|\?)|lcm|length|list(?:->string|->vector|-copy|-ref|-set!|-tail|\?)?|make-(?:bytevector|list|parameter|string|vector)|map|max|member|memq|memv|min|modulo|negative\?|newline|not|null\?|number(?:->string|\?)|numerator|odd\?|open-(?:input|output)-(?:bytevector|string)|or|output-port(?:-open\?|\?)|pair\?|peek-char|peek-u8|port\?|positive\?|procedure\?|quotient|raise|raise-continuable|rational\?|rationalize|read-(?:bytevector|bytevector!|char|error\?|line|string|u8)|real\?|remainder|reverse|round|set-c[ad]r!|square|string(?:->list|->number|->symbol|->utf8|->vector|-append|-copy|-copy!|-fill!|-for-each|-length|-map|-ref|-set!|\?|<\?|<=\?|=\?|>\?|>=\?)?|substring|symbol(?:->string|\?|=\?)|syntax-error|textual-port\?|truncate(?:-quotient|-remainder|\/)?|u8-ready\?|utf8->string|values|vector(?:->list|->string|-append|-copy|-copy!|-fill!|-for-each|-length|-map|-ref|-set!|\?)?|with-exception-handler|write-(?:bytevector|char|string|u8)|zero\?)(?=[()\s]|$)/,
 		lookbehind: true
 	},
 	'operator': {
-		pattern: /(\()(?:[-+*%/]|[<>]=?|=>?)(?=[()\s]|$)/,
+		pattern: /((?:^|[^'`#])\()(?:[-+*%/]|[<>]=?|=>?)(?=[()\s]|$)/,
 		lookbehind: true
 	},
 	'number': {
@@ -66,7 +66,7 @@ Prism.languages.scheme = {
 		lookbehind: true
 	},
 	'function': {
-		pattern: /(\()(?:[^|()'\s]+|\|(?:[^\\|]|\\.)*\|)(?=[()\s]|$)/,
+		pattern: /((?:^|[^'`#])\()(?:[^|()'\s]+|\|(?:[^\\|]|\\.)*\|)(?=[()\s]|$)/,
 		lookbehind: true
 	},
 	'identifier': {

tests/languages/scheme/issue2609.test

@@ -0,0 +1,30 @@
+'(foo bar baz)
+`(foo bar baz)
+#(foo bar baz)
+'#(foo bar baz)
+
+----------------------------------------------------
+
+[
+	["punctuation", "'"],
+	["punctuation", "("],
+	"foo bar baz",
+	["punctuation", ")"],
+	"\r\n`",
+	["punctuation", "("],
+	"foo bar baz",
+	["punctuation", ")"],
+	"\r\n#",
+	["punctuation", "("],
+	"foo bar baz",
+	["punctuation", ")"],
+	["punctuation", "'"],
+	"#",
+	["punctuation", "("],
+	"foo bar baz",
+	["punctuation", ")"]
+]
+
+----------------------------------------------------
+
+None of the "foo"s are functions, so they shouldn't be highlighted as such. See #2609 for more details.