Ergo.Numeric (Ergo v0.9.9)

The Parsers module exists to house utility parsers that while they are terminals in the sense that they are not parameterised, they internally make use of parsers from the Combinators module.

Parsers

uint
decimal
digits

Link to this section Summary

Functions

decimal(opts \\ [])

Examples

iex> alias Ergo.Context
iex> import Ergo.Numeric
iex> context = Ergo.parse(decimal(), "234.56")
iex> assert %Context{status: :ok, ast: 234.56} = context

digits(opts \\ [])

The digits parser matches a series of at least one digit and returns an enumeration of the digits.

number(opts \\ [])

The number parser matches both integer and decimal string and converts them into their appropriate Elixir integer or float values.

uint(opts \\ [])

The unit parser matches a series of at least one digit and returns the integer value of the digits.

Link to this section Functions

decimal(opts \\ [])

Examples

iex> alias Ergo.Context
iex> import Ergo.Numeric
iex> context = Ergo.parse(decimal(), "234.56")
iex> assert %Context{status: :ok, ast: 234.56} = context

digits(opts \\ [])

The digits parser matches a series of at least one digit and returns an enumeration of the digits.

Examples

iex> alias Ergo.Context
iex> import Ergo.Numeric
iex> context = Ergo.parse(digits(), "2345")
iex> assert %Context{status: :ok, ast: [2, 3, 4, 5]} = context

number(opts \\ [])

The number parser matches both integer and decimal string and converts them into their appropriate Elixir integer or float values.

Examples

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 42} = Ergo.parse(number(), "42")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 42} = Ergo.parse(number(), "+42")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: -42} = Ergo.parse(number(), "-42")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 42.0} = Ergo.parse(number(), "42.0")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: -42.0} = Ergo.parse(number(), "-42.0")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 0} = Ergo.parse(number(), "0")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 0} = Ergo.parse(number(), "0000")

iex> import Ergo.Numeric
iex> assert %{status: {:error, _}} = Ergo.parse(number(), "Fourty Two")

iex> import Ergo.Numeric
iex> assert %{status: :ok, ast: 42} = Ergo.parse(number(), "42Fourty Two")

uint(opts \\ [])

The unit parser matches a series of at least one digit and returns the integer value of the digits.

Examples

iex> alias Ergo.Context
iex> import Ergo.Numeric
iex> context = Ergo.parse(uint(), "2345")
iex> assert %Context{status: :ok, ast: 2345, index: 4, col: 5} = context