From 688d5fa6eb2c7f5281e50ace1401737479911ebc Mon Sep 17 00:00:00 2001 From: "T. Foley" Date: Sun, 6 Jun 2021 09:27:19 -0700 Subject: Include a "stack trace" with nested-import errors (#1872) * Include a "stack trace" with nested-import errors When errors occur in nested `#include` files it is often helpful to have a "stack trace" / traceback of the `#include` chain that led from a root translation unit to the file with an error. This change implements a similar feature for `import`s. It is worth noting that `import`s don't really *require* this kind of compiler support the way `#include`s do because the intention is that the meaning of an `import`ed file does not depend on the order or nesting of `import`s. As such, when trying to *fix* an error in an `import`ed file, you usually don't care how it came to be `import`ed into your shaders. The use case here is somebody adapting a large body of Slang code to use in a different codebase, such that they have certain `.slang` files they don't actually intend to have compile correctly, and they want to be able to diagnose how they came to include those files when/if they cause problems. The actual feature implementation is pretty simple because we already track a stack of active `import`s so that we can detect and diagnose recursive `import`s. This change simply changes the disagnostics when there is an error in imported code so that instead of just noting the inner-most `import` site it lists all the `import` sites that were active at the time. The change includes a test case to confirm that the behavior works (at least for the case of a parse error). * fixup: test outputs Co-authored-by: Yong He Co-authored-by: jsmall-nvidia --- tests/bugs/import-with-error.slang.expected | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'tests/bugs') diff --git a/tests/bugs/import-with-error.slang.expected b/tests/bugs/import-with-error.slang.expected index 86f34fc9f..8dbe7efbc 100644 --- a/tests/bugs/import-with-error.slang.expected +++ b/tests/bugs/import-with-error.slang.expected @@ -3,9 +3,10 @@ standard error = { tests/bugs/import-with-error-extra.slang(10): error 30015: undefined identifier 'b'. int a = b; ^ -tests/bugs/import-with-error.slang(6): fatal error 39999: error in imported module, compilation ceased. +tests/bugs/import-with-error.slang(6): error 39999: import of module 'import_with_error_extra' failed because of a compilation error import import_with_error_extra; ^~~~~~~~~~~~~~~~~~~~~~~ +(0): fatal error 39999: compilation ceased } standard output = { } -- cgit v1.2.3