`fexpr_arg, fexpr_view_arg`

Synopsis#include <flint/fexpr.h>

void fexpr_arg(fexpr_t res, const fexpr_t expr, slong i)source

void fexpr_view_arg(fexpr_t res, const fexpr_t expr, slong i)source

For a call $f(e_1, \ldots, e_n)$ , sets res to a copy of, or a view of, the argument $e_{i+1}$ (indices start at 0 and must satisfy $0 \le i < n$ ). Throws an exception if expr is an atom. Access takes $O(1)$ steps for calls with more than four arguments, thanks to the index.

Guides#

Building and printing expressions

Cite this page

The FLINT team, “fexpr_arg, fexpr_view_arg (fexpr.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/fexpr/fexpr_arg.html (generated 2026-11-02).

@misc{flint-doc-fexpr-fexpr-arg,
  author       = {{The FLINT team}},
  title        = {{fexpr\_arg, fexpr\_view\_arg (fexpr.h)}},
  howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
  year         = {2026},
  url          = {https://flintlib.org/doc/fexpr/fexpr_arg.html},
  note         = {Generated 2026-11-02}
}

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