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@@ -288,7 +288,7 @@ These 11 lines are the most important in the application. This is what's used t
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(dispatch-solution (non-atomic-add new unchecked) (cons new current-path))))
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#+END_SRC
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-* WORKING Expression Classification [1/9]
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+* WORKING Expression Classification [2/9]
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:PROPERTIES:
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:ID: 98ce9388-02b2-4027-aa4e-0a82ef8e3cbd
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:END:
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@@ -339,11 +339,14 @@ To even be able to check types, we need to define types. This is done with the
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',type-name)))
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#+END_SRC
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-** TODO Expresion Type Checking
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+** DONE Expression Type Checking
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+CLOSED: [2019-07-12 Fri 13:56]
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:PROPERTIES:
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:ID: 34540858-636e-4336-89e7-63dca947c739
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:END:
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+Expressions are checked for their type with ~expression-type-p~, which takes a type name (either ~*~ or one that's defined later on), and an expression. If the type name is simply ~*~, it returns true. Otherwise, it looks for the type predicate (using ~assoc~), and calls it (the second value in the three-tuple ~*types*~ entry) on the expression.
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+
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#+Caption: Expression Type Checking
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#+Name: expression-type-checking
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#+BEGIN_SRC lisp
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