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Adding friendly error for when needs misses a type declaration #907

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Sep 17, 2019
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Adding friendly error for when needs misses a type declaration #907

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3 changes: 3 additions & 0 deletions src/lucky/assignable.cr
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Original file line number Diff line number Diff line change
@@ -1,6 +1,9 @@
module Lucky::Assignable
macro needs(*type_declarations)
{% for declaration in type_declarations %}
{% unless declaration.is_a?(TypeDeclaration) %}
{% raise "needs expected a type declaration like 'name : String', instead got: '#{declaration}'" %}
{% end %}
{% ASSIGNS << declaration %}
{% end %}
end
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