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Add num_params, is_vararg, nups to FunctionInfo #665

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Add num_params, is_vararg, nups to FunctionInfo #665

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20 changes: 18 additions & 2 deletions src/function.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,15 @@ pub struct FunctionInfo {
pub line_defined: Option<usize>,
/// The line number where the definition of the function ends (not set by Luau).
pub last_line_defined: Option<usize>,
/// Number of function parameters
#[cfg(any(not(any(feature = "lua51", feature = "luajit")), doc))]
pub num_params: usize,
/// True if function accepts variable args
#[cfg(any(not(any(feature = "lua51", feature = "luajit")), doc))]
pub is_vararg: bool,
/// Number of upvalues
#[cfg(any(not(feature = "luau"), doc))]
pub nups: usize,
}

/// Luau function coverage snapshot.
Expand Down Expand Up @@ -343,7 +352,8 @@ impl Function {

/// Returns information about the function.
///
/// Corresponds to the `>Sn` what mask for [`lua_getinfo`] when applied to the function.
/// Corresponds to the `>Snu` (`>Sn` for Luau) what mask for
/// [`lua_getinfo`] when applied to the function.
///
/// [`lua_getinfo`]: https://www.lua.org/manual/5.4/manual.html#lua_getinfo
pub fn info(&self) -> FunctionInfo {
Expand All @@ -356,7 +366,7 @@ impl Function {
let mut ar: ffi::lua_Debug = mem::zeroed();
lua.push_ref(&self.0);
#[cfg(not(feature = "luau"))]
let res = ffi::lua_getinfo(state, cstr!(">Sn"), &mut ar);
let res = ffi::lua_getinfo(state, cstr!(">Snu"), &mut ar);
#[cfg(feature = "luau")]
let res = ffi::lua_getinfo(state, -1, cstr!("sn"), &mut ar);
mlua_assert!(res != 0, "lua_getinfo failed with `>Sn`");
Expand All @@ -381,6 +391,12 @@ impl Function {
last_line_defined: linenumber_to_usize(ar.lastlinedefined),
#[cfg(feature = "luau")]
last_line_defined: None,
#[cfg(not(any(feature = "lua51", feature = "luajit")))]
num_params: ar.nparams as usize,
#[cfg(not(any(feature = "lua51", feature = "luajit")))]
is_vararg: ar.isvararg != 0,
#[cfg(not(feature = "luau"))]
nups: ar.nups as usize,
}
}
}
Expand Down
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