Struct IdentifierParser

struct IdentifierParser<'ident> { ... }

Expression parser/evaluator that supports identifiers.

Implementations

impl<'ident> IdentifierParser<'ident>

fn new(identifiers: &HashMap<Vec<u8>, EvalResult>) -> IdentifierParser<'_>

Create a new IdentifierParser with a set of known identifiers. When a known identifier is encountered during parsing, it is substituted for the value specified.

fn expr<'a>(self: &Self, input: &'a [Token]) -> CResult<'a, EvalResult>

Parse and evaluate an expression of a list of tokens.

Returns an error if the input is not a valid expression or if the token stream contains comments, keywords or unknown identifiers.

fn macro_definition<'a>(self: &Self, input: &'a [Token]) -> CResult<'a, (&'a [u8], EvalResult)>

Parse and evaluate a macro definition from a list of tokens.

Returns the identifier for the macro and its replacement evaluated as an expression. The input should not include #define.

Returns an error if the replacement is not a valid expression, if called on most function-like macros, or if the token stream contains comments, keywords or unknown identifiers.

N.B. This is intended to fail on function-like macros, but if it the macro takes a single argument, the argument name is defined as an identifier, and the macro otherwise parses as an expression, it will return a result even on function-like macros.

// will evaluate into IDENTIFIER
#define DELETE(IDENTIFIER)
// will evaluate into IDENTIFIER-3
#define NEGATIVE_THREE(IDENTIFIER)  -3

impl<'ident> Debug for IdentifierParser<'ident>

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

impl<'ident> Freeze for IdentifierParser<'ident>

impl<'ident> RefUnwindSafe for IdentifierParser<'ident>

impl<'ident> Send for IdentifierParser<'ident>

impl<'ident> Sync for IdentifierParser<'ident>

impl<'ident> Unpin for IdentifierParser<'ident>

impl<'ident> UnwindSafe for IdentifierParser<'ident>

impl<T> Any for IdentifierParser<'ident>

fn type_id(self: &Self) -> TypeId

impl<T> Borrow for IdentifierParser<'ident>

fn borrow(self: &Self) -> &T

impl<T> BorrowMut for IdentifierParser<'ident>

fn borrow_mut(self: &mut Self) -> &mut T

impl<T> From for IdentifierParser<'ident>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into for IdentifierParser<'ident>

fn into(self: Self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

impl<T, U> TryFrom for IdentifierParser<'ident>

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto for IdentifierParser<'ident>

fn try_into(self: Self) -> Result<U, <U as TryFrom<T>>::Error>