pub enum LineKind {
Declaration,
Statement,
Expression,
}Expand description
What one line of source is, as far as the grammar can tell from its opening tokens.
The REPL builds a file out of the lines typed at it, and where a line goes depends on which of these it is. Only the grammar knows which tokens open a declaration, so the answer is read here rather than guessed from the text.
Variants§
Declaration
A top-level declaration: one of the forms parse accepts at file
scope, which a block does not.
Statement
A statement: it belongs in a block and yields no value.
Expression
Anything else, which may be an expression with a value to show. The reading is a guess: the opening tokens rule out the other two, and only a compile settles the rest.
Trait Implementations§
impl Copy for LineKind
impl Eq for LineKind
impl StructuralPartialEq for LineKind
Auto Trait Implementations§
impl Freeze for LineKind
impl RefUnwindSafe for LineKind
impl Send for LineKind
impl Sync for LineKind
impl Unpin for LineKind
impl UnsafeUnpin for LineKind
impl UnwindSafe for LineKind
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