Function opg::opg_generate

pub(crate) fn opg_generate(contents: &String)

Generate Operator Precedence Table for context-free grammar contents.

Input

contents The string read from file.

Example

// Contents of the file
let contents = fs::read_to_string(filename).expect("No such file.");
// Get the table
opg_generate(&contents);

Principles

Generate FIRSTVT and LASTVT for the contents. Then add S->$S$ for the starting non-terminal. Generate OpTable struct based on the algorithm of find_eq(), find_less(), find_greater(). Finally, print the OpTable.