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fetchvalue

zsh::ported::params

Function fetchvalue 

Source 
pub fn fetchvalue<'a>(
    v: Option<&'a mut value>,
    pptr: &mut &str,
    bracks: i32,
    scanflags: i32,
) -> Option<&'a mut value>
Expand description

Port of fetchvalue() from Src/params.c:2180.

Walks the parameter expression starting at *pptr, consuming the identifier (or special-char like ?/#/$/!/@/*/ -) and updating *pptr to point past the name. Looks up the param in paramtab and populates the Value’s pm/start/end/ scanflags fields.

Identifier, special-char and digit names are parsed and looked up. Nameref resolution (the getnode vs getnode2 choice on SCANPM_NONAMEREF, c:2227-2236), bracket subscripts (getindex at c:2288) and the SCANPM_ARRONLY scanflags promotion for hash/array params are handled. C’s fetchvalue has no separate nameref-slice path; getparamnode (c:570-575) resolves references through resolve_nameref.