pub fn eval_const_expr(source: &str) -> Result<Value, EmbeddingError>Expand description
Evaluate a constant expression by compiling it as a one-binding
program: what a comprehension source such as partitions("*\/4", 1000)
goes through. Cached by source text, so the same text compiles once
per process (SRD 113 §5.2). An expression that reaches a dynamic
input is a lifecycle error.