swirl (version 2.2.21)

expr_is_a: Test that the expression itself is of a specific class.

Description

Returns TRUE if e$expr is of the given class.

Usage

expr_is_a(class)

Arguments

class

expected class of the given expression

Value

• TRUE or FALSE

See Also

Other AnswerTests: AnswerTests; any_of_exprs; expr_creates_var; expr_identical_to; expr_uses_func; func_of_newvar_equals; omnitest; val_has_length; val_matches; var_is_a

Examples

# Test if the expression entered by a user is an assignment
#
expr_is_a('<-')