Getting all constants from header include files

[trile127]

Is there any way to get all constants from an included header file?

say i have a myheader.sv file:

// Define constants or macros used in the SystemVerilog file
`define TEST_OUT1_CONSTANT 1'b1

and in test.sv

it uses TEST_OUT1_CONSTANT, in the syntax tree, after reading in the included file from then on every location of TEST_OUT1_CONSTANT is replaced with the value 1.

What if i want the original source to show the constant?

[MikePopoloski]

The token representing the value in the parse tree will have a Trivia entry containing the original macro usage syntax node, so you can search through the tree for those and find all of the macro usages.

[trile127]

Not sure how to get that trivia entry to show as i use the AST serializer class to serialize the tree and print it out and i see no Trivia node kind.

inline std::string serialize(slang::ast::Compilation &comp, bool sourceInfo = false, bool detailedTypeInfo = false,
                             bool includeDefinitions = false) {
    slang::JsonWriter writer;
    // writer.setPrettyPrint(true);

    slang::ast::ASTSerializer serializer(comp, writer);
    serializer.setIncludeAddresses(false);
    serializer.setIncludeSourceInfo(false);
    // serializer.setDetailedTypeInfo(detailedTypeInfo);
    serializer.serialize(comp.getRoot());

    if (includeDefinitions) {
        for (auto def : comp.getDefinitions())
            serializer.serialize(*def);
    }

    return std::string(writer.view());
}

[MikePopoloski]

Trivia is part of the concrete syntax tree, i.e. SyntaxNodes and Tokens. The AST does not necessarily retain that information, and it certainly doesn't serialize it back out again. That's not really what you were asking about in your original question though?