https://github.com/yglukhov/variant

Variant type and type matching for Nim
https://github.com/yglukhov/variant

Last synced: 7 months ago
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Variant type and type matching for Nim

• Host: GitHub
• URL: https://github.com/yglukhov/variant
• Owner: yglukhov
• License: mit
• Created: 2015-12-24T20:41:27.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2024-08-12T14:31:14.000Z (about 1 year ago)
• Last Synced: 2024-10-14T15:04:31.733Z (12 months ago)
• Language: Nim
• Size: 50.8 KB
• Stars: 61
• Watchers: 4
• Forks: 8
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# variant [![Build Status](https://github.com/yglukhov/variant/workflows/CI/badge.svg?branch=master)](https://github.com/yglukhov/variant/actions?query=branch%3Amaster) [![nimble](https://img.shields.io/badge/nimble-black?logo=nim&style=flat&labelColor=171921&color=%23f3d400)](https://nimble.directory/pkg/variant)

Variant type and type matching for Nim

```nim

import variant

var v = newVariant(5)

assert v.ofType(int)

assert v.get(int) == 5

v = newVariant(3.0)

assert v.ofType(float)

assert v.get(float) == 3.0

v = newVariant(@[1, 2, 3])

assert v.ofType(seq[int])

assert v.get(seq[int])[1] == 2

```

Matching:

```nim

var v = newVariant(@[1, 2, 3])

assert v.ofType(seq[int])

variantMatch case v as u

of int:

    echo "u is int: ", u

of seq[int]:

    echo "u is seq[int]: ", u

else:

    echo "dont know what v is"

```

Will output:

```

u is seq[int]: @[1, 2, 3]

```