add jflex

.gitignore

@@ -42,3 +42,5 @@ bin/
 .DS_Store
 
 src/main/gen
+/idea-flex.skeleton
+/jflex-1.9.1.jar

src/main/kotlin/ru/crabs/sjson/SJson.bnf

@@ -16,6 +16,8 @@
     space = 'regexp:\s+'
     string = "regexp:\"[^$][^\"]*\""
     number = "regexp:\d*"
+
+    vars_word = "@vars"
   ]
 }
 

src/main/kotlin/ru/crabs/sjson/SJson.flex

@@ -0,0 +1,45 @@
+package ru.crabs.sjson.language;
+
+import com.intellij.lexer.FlexLexer;
+import com.intellij.psi.tree.IElementType;
+import ru.crabs.sjson.SJsonTypes;
+import com.intellij.psi.TokenType;
+
+%%
+
+%class SJsonLexer
+%implements FlexLexer
+%unicode
+%function advance
+%type IElementType
+%eof{  return;
+%eof}
+
+string = \"{valid_character}*\"
+valid_character = {valid_set_char} | {valid_escape_seq}
+valid_set_char = [^\u0000-\u001F\"\\]
+valid_escape_seq = \\([\"\\/bfnrt]|(u({hex_digit}{4})))
+hex_digit = [0-9a-fA-F]
+
+%state STRING
+
+%%
+
+<YYINITIAL> {
+    "@vars" { return SJsonTypes.VARS_WORD; }
+    {string} { return SJsonTypes.STRING; }
+    \" { yybegin(STRING); return TokenType.WHITE_SPACE; }
+}
+
+<STRING> {
+    "{" { return TokenType.WHITE_SPACE;  } // todo может "левая скобка" должна возвращаться
+    "}" { return TokenType.WHITE_SPACE; }
+
+    "[" { return TokenType.WHITE_SPACE; }
+    "]" { return TokenType.WHITE_SPACE; }
+
+    "," { return TokenType.WHITE_SPACE; }
+    ":" { return TokenType.WHITE_SPACE; }
+
+    \"   { yybegin(YYINITIAL); return TokenType.WHITE_SPACE; }
+}