Enum LuaVersion 

pub enum LuaVersion {
    Lua51,
    Lua52,
    Lua53,
    Lua54,
    MacroLua,
    Lua55,
}

Lua dialect the VM emulates. Drives lexer, parser, and runtime feature gating. Lua55 is the primary; the others are compat modes; MacroLua (v1.3 Phase ML) is an additive dialect built on top of the 5.4 base.

Enum ordering note: MacroLua is placed between Lua54 and Lua55 on purpose. The capability predicates below use >= / <= comparisons; placing MacroLua immediately after Lua54 means MacroLua inherits every 5.4-and-earlier capability for free while staying below the 5.5-only gate (global keyword, named vararg).

Variants

Lua51

Lua 5.1 — no integer subtype, arg table, no goto.

Lua52

Lua 5.2 — adds goto / bit32 / \xXX escapes, retires setfenv.

Lua53

Lua 5.3 — adds native 64-bit integers, bitwise ops, string.pack.

Lua54

Lua 5.4 — adds <const> / <close> attributes and integer-for spec.

MacroLua

MacroLua (v1.3 Phase ML) — 5.4 base + compile-time macros (@name(args), @quote{...}, @if, @gensym). Opt-in via Vm::new(LuaVersion::MacroLua); PUC 5.1-5.5 lexer/parser behavior is not affected. See docs/compatibility.md “MacroLua extensions”.

Lua55

Lua 5.5 — adds global declarations and named vararg parameters.

Implementations

impl LuaVersion

pub fn has_integers(self) -> bool

Integer subtype and integer literals (5.3+).

pub fn has_goto(self) -> bool

goto / ::label:: (5.2+); goto is a reserved word.

pub fn has_bitwise_ops(self) -> bool

& | ~ << >> operators (5.3+).

pub fn has_idiv(self) -> bool

// floor division (5.3+).

pub fn has_attribs(self) -> bool

<const> / <close> attributes on local declarations (5.4+).

pub fn has_hex_float(self) -> bool

Hexadecimal float literals 0x1p4 (5.2+).

pub fn has_extended_escapes(self) -> bool

String escapes \z, \xXX (5.2+) and \u{XXX} (5.3+).

pub fn has_unicode_escape(self) -> bool

\u{XXX} unicode escape specifically (5.3+).

pub fn has_empty_statement(self) -> bool

Empty statement ; (5.2+).

pub fn has_global_decl(self) -> bool

global declarations; global is a reserved word (5.5+).

pub fn has_named_vararg(self) -> bool

Named vararg parameter function f(...name) (5.5+).

pub fn has_collective_attrib(self) -> bool

Leading collective attribute in declarations: local <const> a, b (5.5+).

pub fn break_is_last_statement(self) -> bool

In 5.1 break is a “last statement” like return; later versions allow it anywhere in a block.

pub fn rejects_nested_long_string(self) -> bool

In 5.1, [[ inside a level-0 long string is an error (“nesting of [[…]] is deprecated”).

pub fn is_macro_lua(self) -> bool

MacroLua dialect — compile-time macros enabled in lexer/parser. Base semantics = Lua 5.4 (audit-locked, v1.3 Phase ML).

Trait Implementations

impl Clone for LuaVersion

fn clone(&self) -> LuaVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LuaVersion

impl Debug for LuaVersion

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

Formats the value using the given formatter.

impl Eq for LuaVersion

impl Ord for LuaVersion

fn cmp(&self, other: &LuaVersion) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for LuaVersion

fn eq(&self, other: &LuaVersion) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for LuaVersion

fn partial_cmp(&self, other: &LuaVersion) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for LuaVersion