extendr_api::graphics

Function GEExpressionMetric

Source 
pub unsafe extern "C" fn GEExpressionMetric(
    expr: *mut SEXPREC,
    gc: *mut R_GE_gcontext,
    ascent: *mut f64,
    descent: *mut f64,
    width: *mut f64,
    dd: *mut _GEDevDesc,
)