exvalibur v0.5.0 Exvalibur.Sigils View Source
Implementation of sigils ~v
and ~V
to allow patterns inside matches
in rules
.
Import this module to get an access to sigils.
Link to this section Summary
Functions
Handles the sigil ~V
for non-interpolated match expressions
Handles the sigil ~v
for interpolated match expressions
Link to this section Functions
Handles the sigil ~V
for non-interpolated match expressions.
It returns an AST that might be used as is in Exvalibur.validator!/2
’s rules.
Examples
iex> import Exvalibur.Sigils
iex> ~V[%{} = _]
{:=, [line: 15], [{:%{}, [line: 15], []}, {:_, [line: 15], nil}]}
iex> ~V[<<"foo", _ :: binary>>]
{:<<>>, [line: 14],
["foo", {:::, [line: 14], [{:_, [line: 14], nil}, {:binary, [line: 14], nil}]}]}
iex> ~V[<<invalid]
** (TokenMissingError) nofile:14: missing terminator: >> (for "<<" starting at line 14)
Handles the sigil ~v
for interpolated match expressions.
It behaves exactly as sigil_V
save for it interpolates the string passed to sigil.