"[a-zA-Z][a-zA-Z0-9_]*"
"|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
"|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
+PATTERNS("dts",
+ "!;\n"
+ /* lines beginning with a word optionally preceded by '&' or the root */
+ "^[ \t]*((/|&?[a-zA-Z_]).*)",
+ /* -- */
+ /* Property names and math operators */
+ "[a-zA-Z0-9,._+?#-]+"
+ "|[-+*/%&^|!~]|>>|<<|&&|\\|\\|"),
IPATTERN("fortran",
"!^([C*]|[ \t]*!)\n"
"!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
"|[-+*/<>%&^|=!]="
"|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
PATTERNS("matlab",
- "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
+ /*
+ * Octave pattern is mostly the same as matlab, except that '%%%' and
+ * '##' can also be used to begin code sections, in addition to '%%'
+ * that is understood by both.
+ */
+ "^[[:space:]]*((classdef|function)[[:space:]].*)$|^(%%%?|##)[[:space:]].*$",
"[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
PATTERNS("objc",
/* Negate C statements that can look like functions */
"(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
"|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
"|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
+PATTERNS("rust",
+ "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl)[< \t]+[^;]*)$",
+ /* -- */
+ "[a-zA-Z_][a-zA-Z0-9_]*"
+ "|[0-9][0-9_a-fA-Fiosuxz]*(\\.([0-9]*[eE][+-]?)?[0-9_fF]*)?"
+ "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
"[={}\"]|[^={}\" \t]+"),
PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",