Add notion of "unbound" variability to the type system.

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Now, when a type is declared without an explicit "uniform" or "varying"
qualifier, its variability is unbound; depending on the context of the
declaration, the variability is later finalized.

Currently, in almost all cases, types with unbound variability are
resolved to varying types; the one exception is typecasts like:
"(int)1"; in this case, the fact that (int) has unbound variability
carries through to the TypeCastExpr, which in turn notices that the
expression being type cast has uniform type and in turn will resolve
(int) to (uniform int).

Fixes issue #127.

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This commit is contained in:

Matt Pharr

2012-01-06 11:52:58 -08:00

parent 71317e6aa6

commit 15cc812e37

10 changed files with 782 additions and 349 deletions

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