Struct rustlr::zc_parser::StackedItem

pub struct StackedItem<AT: Default> {
    pub value: AT,
    pub line: usize,
    pub column: usize,
    /* private fields */
}

these structures are what’s on the parse stack. When writing a grammar rule such as E --> E:a + E:b, the variables a and b will be bound to values of this type, and thus inside the semantic actions one would need to use a.value to extract the value, which is of the declared ‘absyntype’ of the grammar. Alternatively, one can use a pattern: E:@a@ + E:@b@ to bind a and b directly to the values.

Fields

value: AT

line: usize

column: usize

Implementations

impl<AT: Default> StackedItem<AT>

pub fn new(si: usize, value: AT, line: usize, column: usize) -> StackedItem<AT>

pub fn lbox(self) -> LBox<AT>

converts the information in a stacked item to an LBox enclosing the abstract syntax value along with starting line and column numbers