| as.lazy | Convert an object to a lazy expression or lazy dots. | 
| as.lazy_dots | Convert an object to a lazy expression or lazy dots. | 
| ast | Display a call (or expression) as a tree. | 
| ast_ | Display a call (or expression) as a tree. | 
| as_call | Coerce an object to a name or call. | 
| as_f_list | Build a named list from the LHS of formulas | 
| as_name | Coerce an object to a name or call. | 
| call_modify | Modify the arguments of a call. | 
| call_new | Create a call by "hand" | 
| call_standardise | Modify the arguments of a call. | 
| dots_capture | Make a promise explicit by converting into a formula. | 
| expr_env | Find the expression associated with an argument | 
| expr_find | Find the expression associated with an argument | 
| expr_label | Find the expression associated with an argument | 
| expr_text | Find the expression associated with an argument | 
| find_data | Evaluate a formula | 
| function_new | Create a function by "hand" | 
| f_capture | Make a promise explicit by converting into a formula. | 
| f_env | Get/set formula components. | 
| f_env<- | Get/set formula components. | 
| f_eval | Evaluate a formula | 
| f_eval_lhs | Evaluate a formula | 
| f_eval_rhs | Evaluate a formula | 
| f_interp | Interpolate a formula | 
| f_label | Turn RHS of formula into a string/label. | 
| f_lhs | Get/set formula components. | 
| f_lhs<- | Get/set formula components. | 
| f_list | Build a named list from the LHS of formulas | 
| f_new | Create a formula object by "hand". | 
| f_rhs | Get/set formula components. | 
| f_rhs<- | Get/set formula components. | 
| f_text | Turn RHS of formula into a string/label. | 
| f_unwrap | Unwrap a formula | 
| interp | Interpolate values into an expression. | 
| is_atomic | Is an object a language object? | 
| is_call | Is an object a language object? | 
| is_formula | Is object a formula? | 
| is_lang | Is an object a language object? | 
| is_name | Is an object a language object? | 
| is_pairlist | Is an object a language object? | 
| lazy | Capture expression for later lazy evaluation. | 
| lazy_ | Capture expression for later lazy evaluation. | 
| lazy_dots | Capture ... (dots) for later lazy evaluation. | 
| lazy_eval | Evaluate a lazy expression. | 
| make_call | Make a call with 'lazy_dots' as arguments. | 
| missing_arg | Generate a missing argument. | 
| uq | Interpolate a formula | 
| uqf | Interpolate a formula | 
| uqs | Interpolate a formula |