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Difference between revisions of "VIATRA2/Examples/VTCL/TypeChecking"
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=== Typed variables within ASM rules === | === Typed variables within ASM rules === | ||
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=== Typed variables in graph patterns === | === Typed variables in graph patterns === | ||
Revision as of 06:41, 25 May 2009
Contents
Overview: Type checking
Type checking is introduced to the VTCL language in a backward compatible way. This means that any existing VTCL transformation should compile without modification.
As the main extension of the language, one can add type information to
- all variables defined locally with the let rule
- a parameter of an ASM rule, graph pattern or graph transformation rule
- for the parameters and return values of ASM functions
Then the VIATRA2 parser checks if these variables are used in a type conformant way.