Struct Evaluator 

pub struct Evaluator { /* private fields */ }

Implementations

impl Evaluator

pub fn new(predefined: &BTreeMap<String, String>) -> Self

pub fn expand(&self, input: &str) -> Expansion

pub fn assign( &mut self, variable: &Variable, location: EvaluationLocation, activity: Truth, )

pub fn read_too_early(&self) -> Vec<ReadTooEarly>

Every name a definition read before a definition Make certainly reaches gives it a value, in the order Make read them. Answering this needs the whole reading, so it holds only once the project is loaded.

pub fn gives_a_value(&self, name: &str) -> bool

Whether the project gives name a value of its own somewhere, as against a caller supplying it through the environment, the command line or a parent make. undefine does not take this back: the project still says what the name is worth.

pub fn gives_a_scoped_value(&mut self, name: &str)

Records that the project gives name a value while one rule runs. Make holds it nowhere else, so it is a value the project gives and nothing the evaluator can read.

pub fn undefine(&mut self, name: &str, activity: Truth)

pub fn definition_after( &self, name: &str, definitions_read: usize, ) -> Option<EvaluationLocation>

Where GNU Make next gives name a value, having read definitions_read definitions already, and None where it reads no further definition worth waiting for. Answering this needs the whole reading, so it holds only once the project is loaded.

pub fn certain_definition_after( &self, name: &str, definitions_read: usize, ) -> Option<EvaluationLocation>

Where GNU Make certainly gives name a value after definitions_read, passing over the definitions it reaches only through a branch whose condition it decides while it reads. Those say nothing about whether a reading before them was too early, because Make may reach none of them.

pub fn condition(&self, kind: ConditionalKind, expression: &str) -> Truth

pub fn flavor(&self, name: &str) -> Option<VariableFlavor>

pub fn is_defined(&self, name: &str) -> bool

pub fn expand_as_undefined( &self, input: &str, ) -> Option<(String, Vec<UndefinedName>)>

Expands input the way GNU Make expands it when variables it names have no value here: such a reference contributes nothing to the text around it. Returns the text Make produces and the variables that had no value, in the order they were found.

None once anything but a valueless variable keeps the expression from being expanded, because what Make produces is then genuinely unknown rather than known to be the text without those references.

Trait Implementations

impl Clone for Evaluator

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Evaluator

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

Formats the value using the given formatter.

impl Default for Evaluator

fn default() -> Self

Returns the “default value” for a type.