Function lp_from_str 

pub fn lp_from_str(text: &str) -> Result<LpProblem, GeomError>

Parses a linear program from text.

The grammar is deliberately tiny:

max 3x + 5y
subject to
  x <= 4
  2y <= 12
  3x + 2y <= 18
bounds
  y >= 1
  free z

The first line gives the sense and the objective. Everything after subject to (or st, or s.t.) is a constraint row until an optional bounds section, where single-variable lines set bounds rather than adding rows and free x removes a variable’s lower bound. Blank lines and # comments are ignored, coefficients may be omitted, and variables are numbered in order of first appearance.

Errors

Returns GeomError::InvalidArgument naming the first thing that could not be read.