Frestar is a CFG language grammar which was developed with .net and that is useful for executing tasks and processes This compiler is able to prioritize nested instructions in order of execution with syntax controller
A context-free grammar G is defined by the 4-tuple G = ( V , Σ , R , S )
1- V is a finite set; each element v ∈ V is called a nonterminal character or a variable. Each variable represents a different type of phrase or clause in the sentence. Variables are also sometimes called syntactic categories. Each variable defines a sub-language of the language defined by G.
2- Σ is a finite set of terminals, disjoint from V, which make up the actual content of the sentence. The set of terminals is the alphabet of the language defined by the grammar G.
3- P is a finite relation in V×(V∪Σ) , where the asterisk represents the Kleene star operation. The members of P are called the (rewrite) rules or productions of the grammar. (also commonly symbolized by a R)
4- S is the start variable (or start symbol), used to represent the whole sentence (or program). It must be an element of V.
c => function name
r => open region eg: { or (
w => close region eg: } or )
d => 'Value' eg: string or number or date ... 'Bahrami'
a => variable or parameter name
b => Assign symbol eg: = or :
o => seperator between parameter eg: , or ...
you can write nested statements with this grammar you can write '(' instead of '{' or '=' instead of ':' without any problem
var1:upload{var2:getdata{a:'12'},var3:openurl{url:'http://alireza.com/pp', varpic:getpic{user:getuserid{username:'alirezakoo'}}}};
Or you can write:
var1=upload(p1=getData(query='select * from hr.table1',con='server=.,uid=test')),p2=openUrl(url='http=//alireza.com/pp', p3=getPic(user=getUserId(username='alirezakoo'))));and then you can compile your code simply with this code in c#
var result=(@"var1=upload(p1=getData(query='select * from hr.table1',con='server=.,uid=test')),p2=openUrl(url='http=//alireza.com/pp', p3=getPic(user=getUserId(username='alirezakoo'))));").FrestarCompile();
