metaExpr: Mark an expression as a meta-expression

In shinymeta: Export Domain Logic from Shiny using Meta-Programming

Mark an expression as a meta-expression

Description

Mark an expression as a meta-expression

Usage

metaExpr(
  expr,
  env = parent.frame(),
  quoted = FALSE,
  localize = "auto",
  bindToReturn = FALSE
)

Arguments

expr	An expression (quoted or unquoted).
env	An environment.
quoted	Is the expression quoted? This is useful when you want to use an expression that is stored in a variable; to do so, it must be quoted with quote().
localize	Whether or not to wrap the returned expression in local(). The default, "auto", only wraps expressions with a top-level return() statement (i.e., return statements in anonymized functions are ignored).
bindToReturn	For non-localized expressions, should an assignment of a meta expression be applied to the last child of the top-level ⁠\{⁠ call?

Value

If inside meta mode, a quoted form of expr for use inside of metaReactive2(), metaObserve2(), or metaRender2(). Otherwise, in normal execution, the result of evaluating expr.

See Also

metaReactive2(), metaObserve2(), metaRender2(), ..

shinymeta documentation built on April 12, 2025, 1:17 a.m.