CODEWITHSUNDEEP
parsingantlrgrammar
Sonia
Sonia

Reputation: 1044

A grammar for one variable functions in ANTLR

Hey! I am looking for an ANTLR grammar for parsing one variable function expressions. It should support +,-, /, ^, special functions (e.g. cos, sin) and constants (pi, e) and parenthesis. I tried writing it myself but I get left-recursion warnings. Does anyone have a example that I can get started with? I would like to write something like 

x+sin(5x + pi^3)/(15e cos(x))

for example. ANTLR grammars are preferred but other (E)BNF examples will be appreciated.

Eventually I would like to use it with AST output.

THANX

Upvotes: 2

Views: 2000

Answers (1)

Sonia
Sonia

Reputation: 1044

Ok, that was fast. I found a great article on code project.

It has everything I wanted and more!

Upvotes: 2

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