Enum texlang::command::Command

pub enum Command<S> {
    Expansion(ExpansionFn<S>, Option<Tag>),
    Macro(Rc<Macro>),
    Execution(ExecutionFn<S>, Option<Tag>),
    Variable(Rc<Command<S>>),
    CharacterTokenAlias(Value),
    Character(char),
    MathCharacter(MathCode),
}

A TeX command.

Variants

Expansion(ExpansionFn<S>, Option<Tag>)

An expansion primitive that is implemented in the engine.

Examples: \the, \ifnum.

Macro(Rc<Macro>)

A user defined macro.

Examples: \newcommand and \include in LaTeX.

Execution(ExecutionFn<S>, Option<Tag>)

A non-expansion primitive that performs operations on the state.

Examples: \def, \par.

Variable(Rc<Command<S>>)

A command that is used to reference a variable, like a parameter or a register.

Such a command is resolved to get the variable using the function pointer it holds.

Examples: \count, \year.

CharacterTokenAlias(Value)

A command that aliases a character token.

Depending on the context in which this command appears it may behave like a character (when typesetting) or like an unexpandable command (when parsing integers). Created using \let\cmd=<character>.

Character(char)

A command that references a character.

These commands are generally created using \countdef. In the main inner loop they result in a character being typeset. In other contexts they are interpreted as numbers. In Plain TeX, \countdef 255 is used as a more efficient version of \def{255 }.

MathCharacter(MathCode)

A command that references a math character.

These commands are generally created using \mathchardef.

Implementations

impl<S> Command<S>

pub fn tag(&self) -> Option<Tag>

Gets the tag associated to this command, or None if the command has no tag.

Trait Implementations

impl<S> Clone for Command<S>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<S> Display for Command<S>

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

Formats the value using the given formatter.

impl<S> From<Command<S>> for BuiltIn<S>

fn from(cmd: Command<S>) -> Self

Converts to this type from the input type.