diff options
Diffstat (limited to 'sli/common/src/main/antlr4/org/onap/ccsdk/sli/core/sli/ExprGrammar.g4')
-rwxr-xr-x | sli/common/src/main/antlr4/org/onap/ccsdk/sli/core/sli/ExprGrammar.g4 | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sli/common/src/main/antlr4/org/onap/ccsdk/sli/core/sli/ExprGrammar.g4 b/sli/common/src/main/antlr4/org/onap/ccsdk/sli/core/sli/ExprGrammar.g4 new file mode 100755 index 000000000..42563168c --- /dev/null +++ b/sli/common/src/main/antlr4/org/onap/ccsdk/sli/core/sli/ExprGrammar.g4 @@ -0,0 +1,67 @@ + +grammar ExprGrammar; + +options { + language = Java; +} + + +COMPAREOP : '==' | '!=' | '>' | '<' | '>=' | '<='; + +RELOP : 'and' | 'or'; + +ADDOP : '+' | '-'; + +MULTOP : '/' | '*'; + +NUMBER : ('0'..'9')+; + +STRING : '\'' ~[']* '\''; + +IDENTIFIER : ('a'..'z'|'A'..'Z'|'_') ('a'..'z'|'A'..'Z'|'0'..'9'|'_'|'-')*; + +// CONTEXT_VAR : '$' IDENTIFIER; + +WS: [ \n\t\r]+ -> skip; + +constant : NUMBER | STRING ; + +variableLead : ('$')? variableTerm ; + +variableTerm : IDENTIFIER ('[' expr ']')? ; + +variable : variableLead ('.' variableTerm)* ('.')?; + +// variable : CONTEXT_VAR ( '[' expr ']' )? ('.' IDENTIFIER )? ; + +atom : constant | variable; + + +expr : atom + | parenExpr + | multExpr + | addExpr + | compareExpr + | relExpr + | funcExpr; + +parenExpr : '(' expr ')'; + +term : atom | parenExpr | funcExpr; + +multExpr : term (MULTOP term)*; + +addExpr : multExpr (ADDOP multExpr)*; + +compareExpr : addExpr COMPAREOP addExpr; + +relExpr : compareExpr (RELOP expr)*; + +funcExpr : IDENTIFIER '(' expr (',' expr)* ')'; + + + + + + + |