mm_parse_formula() parses a formula string through the Rust formula
parser and returns its canonical Display rendering. Equivalent formula
spellings produce identical canonical strings, so equivalence-class testing
in R is just string comparison on the canonical form.
Usage
mm_parse_formula(formula)
Arguments
- formula
A single character string (length 1, non-NA, non-empty), or
a one-sided / two-sided R formula object. R formula objects are
coerced to character via format() before parsing.
Value
A single character string: the canonical rendering of the parsed
formula.
Errors
Parse failures are signaled as a typed mm_formula_error condition (also
inheriting from mm_condition and error). The condition object carries
the original input string in its formula field. Catch with
tryCatch(..., mm_formula_error = handler).
Examples
mm_parse_formula("y ~ x + (1 | g)")
#> [1] "y ~ 1 + x + (1 | g)"
mm_parse_formula(y ~ x + (1 | g))
#> [1] "y ~ 1 + x + (1 | g)"