Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.10)
// Compass (v1.0.0.alpha.20)
// ----

// Test maps and breakpoint dimentions

$bp-dims: (
  palm-max: 480px
  );

@function bp-dim($dim){
  @return map-get($bp-dims, $dim)
}

$bp:
 ( palm 'screen and (max-width: #{map-get($bp-dims,palm-max)})'
 , lap  'screen and (min-width: #{bp-dim(palm-max) + 1px})'
 );

/*
#{$bp}

*/

nav {
  width: bp-dim(palm-max);
}

SassMeister-output.css

/*
palm "screen and (max-width: 480px)", lap "screen and (min-width: 481px)"

*/
nav {
  width: 480px;
}