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Diffstat (limited to 'SemanticCheckList.txt')
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diff --git a/SemanticCheckList.txt b/SemanticCheckList.txt new file mode 100644 index 0000000..9bd2c2c --- /dev/null +++ b/SemanticCheckList.txt @@ -0,0 +1,37 @@ +DRAGON Semantic Checklist +========================= + +[ ] 1. Semantic rules for Scoping +[ ] 1.1. Local objects cannot be declared more than once +[ ] 1.2. Local objects hide non-local objects with the same name +[ ] 1.3. Non-local objects should be visible from inner scopes (unless a local object of the same name exists) +[ ] 1.4. Function and procedure names exist in the scope they are defined (and not in their own scopes) +[ ] 1.5. Local objects cease to exist once their scopes cease to exist + +[ ] 2. Semantic rules for Expressions +[ ] 2.1. Expressions return typed-values +[ ] 2.2. Objects must be declared before they used in expressions +[ ] 2.3. Objects of different types cannot appear in the same expression (no type promotions) + +[ ] 3. Semantic rules for Statements +[ ] 3.1. Statements do not return values +[ ] 3.2. The test expression for IF-THEN, IF-THEN-ELSE, WHILE-DO must be Boolean-valued; +[ ] note that the Boolean type must be implicitly defined +[ ] 3.3. The ELSE clause always binds to the closest IF (resolution of the dangling ELSE problem) +[ ] 3.4. The variable type in FOR-DO must match the types of lower bound and upper bound expressions + +[ ] 4. Semantic rules for Arrays +[ ] 4.1. Non-integer valued expressions cannot be used for indexing arrays + +[ ] 5. Semantic rules for Functions +[ ] 5.1. Function calls return values of type Integer or Real +[ ] 5.2. Function must contain a "return" statement within its own body; +[ ] this is of the form: <function_name> := <expression> +[ ] 5.3. Functions must accept exactly the same number of arguments as is +[ ] declared in its header, with the correct sequence of types +[X] 5.4. Functions are not allowed to update the value of nonlocal objects (via assignment statements) + +[ ] 6. Semantic rules for Procedures +[ ] 6.1. Procedure calls do not return values +[ ] 6.2. Procedures must accept exactly the same number of arguments as is +[ ] declared in its header, with the correct sequence of types |