Struct LetStatement 

pub struct LetStatement {
    pub identifier: String,
    pub value_expr: String,
    pub value_kind: String,
    pub type_annotation: Option<TypeExpr>,
    pub value_ast: Option<Expr>,
    pub loc: Loc,
    pub leading_trivia: Vec<Trivia>,
    pub trailing_trivia: Vec<Trivia>,
}

Fields

identifier: String

value_expr: String

value_kind: String

v1.12.0 — preserves the parser’s tokenization intent so the runtime dispatcher can distinguish a quoted literal from a dotted-identifier reference. One of “literal”, “reference”, “expression”. Defaults to “literal” so any pre-cycle-17 caller that constructs a LetStatement directly behaves as a literal.

type_annotation: Option<TypeExpr>

v2.4.0 — optional type annotation let x: <TypeExpr> = …. None for the bare let x = … form (all pre-51.c.3 lets). Inside a quant block the Continuous Type Invariant inspects this to enforce the continuous-carrier discipline (DensityMatrix[D] D=2ⁿ; reject discrete conversational types). Carries the typed encoder-boundary contract.

value_ast: Option<Expr>

v2.26.0 — the parsed expression form of the value, present only when value_kind == "expression" (let total = price * qty + tax). The runtime evaluates it via the pure expression evaluator instead of the pre-v2.26.0 behaviour (which treated an expression as an opaque literal string). None for literal / reference / list values (byte-identical to pre-v2.26.0).

loc: Loc

leading_trivia: Vec<Trivia>

v1.5.2 — leading comment trivia attached to this declaration (comments preceding the declaration’s first token, since the previous declaration or file start). Empty by default.

trailing_trivia: Vec<Trivia>

v1.5.2 — trailing comment trivia (same line as the declaration’s last effective token). Empty by default.

Trait Implementations

impl Debug for LetStatement

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

Formats the value using the given formatter.