Lexical structure

Lexical structure of the language is very close to the JavaScript with some minor additions (e.g. const and type constructions).

Identifiers

Identifiers (nmtokens) start with a alphabetic character, '_' or '$' followed by any number of alphabetic characters, '_', '$' or digits ([0-9]).

nmtoken -> [a-zA-Z_$]+[a-zA-Z_$0-9]*

Keywords

TIScript uses following identifiers as reserved words:

type        function    var         if          else     
while       return      for         break       continue 
do          switch      case        default     null     
super       new         try         catch       finally  
throw       typeof      instanceof  in          property 
const       get         set         like

Operators

The following operators are supported by the language:

<=    ==    !=    >=    <<    >>    &&    ||    
++    --    +=    -=    *=    /=    %=    &=
|=    ^=    <<=   >>=   %>    <%    ===   !==
+     -     *     /     ^     |     &

Special tokens

Tokens that have special meaning:

..   []   {}   #   :  ?

Literals

TIScript accepts integer numbers, floating point numbers, stings literals, symbols, regexp literals, stream expressions and binary literals.

integer-literal -> [0-9]+ | '0x' [0-9A-Fa-f]+ | ''' [.] '''
  float-literal -> [0-9]+ '.' [0-9]+
  float-literal -> [0-9]+ '.' 'e'|'E' '+'|'-' [0-9]+
 string-literal -> '"' [.]* '"'
 symbol-literal -> '#' [a-zA-Z_$0-9-]*
 regexp-literal -> '/' <single line regular expression> ['/ig'] ';'
 stream-literal -> '%>' <text> '<%'
 binary-literal -> '*' [A–Za–z0–9+/=]+ ';'

Examples:

            34 - Integer
    0xAFED1234 - Integer
           'f' - Integer, code point value
          1.52 - Float 
          1.e2 - Float
         1.e-2 - Float
"Hello world!" - String
          #foo - Symbol