createCrudExpressionTree: Create access expression tree

In rappster/crudr: Interfaces for CRUD operations

Description

Creates a tree of access expression. See createCrudExpression.

Usage

createCrudExpressionTree(inst, ...)

Arguments

inst	Object for method dispatch.
...	Further arguments to be passed to subsequent functions/methods.

Details

Known methods:

• createCrudExpressionTree.default

Value

See respective methods.

Author(s)

Janko Thyson [e-mail]

References

http://github.com/rappster/crudr

See Also

Extract, assignOps

Examples

# Example object ----------------------------------------------------------

inst = list()

# No assignment value -----------------------------------------------------

tree <- createCrudExpressionTree(inst, c("a", "b", "c"))
sapply(tree, names)

createCrudExpressionTree(inst, c("a", "b", "c"), name_obj = "x")
createCrudExpressionTree(inst, c("a", "b", "c"), as_name_obj = FALSE)

createCrudExpressionTree(inst, c("a", "b", "c"), fail_safe = TRUE)

# Assignment value --------------------------------------------------------

createCrudExpressionTree(inst, c("a", "b", "c"), value = 1)
createCrudExpressionTree(inst, c("a", "b", "c"), value = 1,
  name_value = "y", as_name_value = TRUE)

createCrudExpressionTree(inst, c("a", "b", "c"), value = 1, fail_safe = TRUE)

rappster/crudr documentation built on May 26, 2019, 11:12 p.m.