Struct execcmd_dispatch 

pub struct execcmd_dispatch {
    pub precmd_skip: usize,
    pub is_builtin: bool,
    pub is_shfunc: bool,
    pub cflags: u32,
    pub use_defpath: bool,
    pub has_command_vv: bool,
    pub exec_argv0: Option<String>,
    pub is_empty_command: bool,
}

Dispatch decision returned by execcmd_compile_head — the fusevm-bytecode-time head resolver that mirrors the local-variable state the C execcmd_exec function carries through c:2913-2916 (is_builtin, is_shfunc, cflags, use_defpath) plus the precmd-modifier strip count. The fusevm bytecode compiler reads this to emit the correct dispatch opcode in src/extensions/compile_zsh.rs::compile_simple.

Not a C struct — invented to bridge the divergence between the C wordcode-walker (which mutates locals + falls through to invocation) and zshrs’s split parse → compile → VM pipeline.

Fields

precmd_skip: usize

Number of BINF_PREFIX words to strip from the head of args. Src/exec.c:3086 uremnode(preargs, firstnode(preargs)).

is_builtin: bool

Set when the head (after strip) is a real builtin (Src/exec.c:3065 is_builtin = 1).

is_shfunc: bool

Set when the head (after strip) is a shell function (Src/exec.c:3053 is_shfunc = 1).

cflags: u32

cflags accumulator from Src/exec.c:2915 — gathers BINF_BUILTIN | BINF_COMMAND | BINF_EXEC | BINF_DASH | BINF_NOGLOB bits encountered during the precommand-modifier walk (c:3062 cflags |= hn->flags).

use_defpath: bool

command -p requested: use the default $PATH for lookup (Src/exec.c:3160 use_defpath = 1). NOT YET HONORED by the fusevm compiler — flagged for follow-up.

has_command_vv: bool

command -v / command -V requested: the dispatch target flips to bin_whence per Src/exec.c:3149-3157 (hn = &commandbn.node; is_builtin = 1). The fusevm compiler reads this and emits Op::CallBuiltin(BUILTIN_WHENCE_FROM_COMMAND) instead of resolving the post-strip head.

exec_argv0: Option<String>

exec -a NAME requested: ARGV0 override per Src/exec.c:3214-3240. Some(NAME) triggers zputenv("ARGV0=NAME") before exec.

is_empty_command: bool

Empty-command branch fired with no redirs (Src/exec.c:3372-3406 — the else arm of if (redir && nonempty(redir))). Covers bare exec / noglob / command. Caller emits lastval = cmdoutval (0 when no $(cmd) ran) and returns. Also fires for the (cflags & BINF_PREFIX) && (cflags & BINF_COMMAND) sub-case at c:3365-3371 (bare command returns 0 without complaining about missing redirs).

Trait Implementations

impl Clone for execcmd_dispatch

fn clone(&self) -> execcmd_dispatch

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for execcmd_dispatch

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for execcmd_dispatch

fn default() -> execcmd_dispatch

Returns the “default value” for a type.