parol-macros 1.0.0

Macros for LL(k) parser generator `parol`
Documentation 
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/// Pops an item from the item stack.
/// Is not intended to be called by anyone else but the auto generated adapter grammar!
#[macro_export]
macro_rules! pop_item {
    ($self:ident, $name:ident, $type:ident, $context:ident) => {
        if let Some(ASTType::$type($name)) = $self.pop($context) {
            $name
        } else {
            return Err(::parol_runtime::ParserError::InternalError(format!(
                "{}: Expecting ASTType::{}",
                stringify!($type),
                $context
            ))
            .into());
        }
    };
}

/// Pops a vector item from the item stack and reverses it
/// Is not intended to be called by anyone else but the auto generated adapter grammar!
#[macro_export]
macro_rules! pop_and_reverse_item {
    ($self:ident, $name:ident, $type:ident, $context:ident) => {
        if let Some(ASTType::$type(mut $name)) = $self.pop($context) {
            $name.reverse();
            $name
        } else {
            return Err(::parol_runtime::ParserError::InternalError(format!(
                "{}: Expecting ASTType::{}",
                stringify!($type),
                $context
            ))
            .into());
        }
    };
}

/// A macro the user can use to generate an adhoc error and early return from the current function
#[macro_export]
macro_rules! bail {
    ($msg:literal $(,)?) => {
        return Err($crate::parol!(::anyhow::anyhow!($msg)))
    };
    ($err:expr $(,)?) => {
        return Err($crate::parol!(::anyhow::anyhow!($err)))
    };
    ($fmt:expr, $($arg:tt)*) => {
        return Err($crate::parol!(::anyhow::anyhow!($fmt, $($arg)*)))
    };
}

/// A macro the user can use to generate an adhoc error
#[macro_export]
macro_rules! parol {
    ($msg:literal $(,)?) => {
        ::parol_runtime::ParolError::UserError(::anyhow::anyhow!($msg))
    };
    ($err:expr $(,)?) => ({
        ::parol_runtime::ParolError::UserError(::anyhow::anyhow!($err))
    });
    ($fmt:expr, $($arg:tt)*) => {
        ::parol_runtime::ParolError::UserError(::anyhow::anyhow!($fmt, $($arg)*))
    };
}