Dream Language

dream.lang

# This is a single line comment

/*
This is a multi-line comment,
useful for when you have lots to say.
*/

# Arithmetic
5 + 5   # 10
5 - 5   # 0
5 * 5   # 25
5 / 5   # 1
5**3    # 125

# Boolean & Special types
True
False
Nil

# Logical operators
True and False # false
True or False # true
not True # false

# Alternate "not" syntax
!True # false
!!True # true

# Expressions
True is True  # True
True == False # False

# Strings
'This is a string'
print('Some text') # Some text

# Variables
x = 10
prefer_snake_case = True

# Strings
animal = 'dog'
interpolation = 'the brown fox jumped over the lazy {animal}'

# Lists
list = [1, 2, 3]
is_odd = list.filter(i: i % 2 is not 0)

# Maps
map = {
  key: 'value',
  hyphens-allowed: True,
  animal,
}

# Control structures
if True {
  print('nice')
} else if False {
  print('sorry')
} else {
  print('dunno')
}

for num, i in ['zero', 'one', 'two'] {
  print('Number "{i}" is pronounced: "{num}"')
}

# Functions
func sum(x, y) {
  return x + y
}

sum(3, 6) # 9

# Modules
# lib/math.lang
give func sum(x, y) {
  return x + y
}

# app.lang
take sum from 'Math'
print('3 + 6 = {sum(3, 6)}')

# Example
take Fetch from 'fetch'

Fetch('http://example.com/api/endpoint', {
  method: 'get',
}).then(+(response) {
  print('response is {response.data}')
}).catch(+(error) {
  print('error: {err.message}')
})