Function HandleLineDirective

Source/SpireCore/Preprocessor.cpp:1509–1558

Handle a `#line` directive

// Handle a `#line` directive
static void HandleLineDirective(PreprocessorDirectiveContext* context)
{
    int line = 0;
    if (PeekTokenType(context) == TokenType::IntLiterial)
    {
        line = StringToInt(AdvanceToken(context).Content);
    }
    else if (PeekTokenType(context) == TokenType::Identifier
        && PeekToken(context).Content == "default")
    {
        AdvanceToken(context);

        // TODO(tfoley): reset line numbering here
        return;
    }
    else
    {
        GetSink(context)->diagnose(PeekLoc(context), Diagnostics::expected2TokensInPreprocessorDirective,
            TokenType::IntLiterial,
            "default",
            GetDirectiveName(context));
        context->parseError = true;
        return;
    }

    if (PeekTokenType(context) == TokenType::EndOfFile)
    {
        // TODO(tfoley): set line number, but not file
        return;
    }

    String file;
    if (PeekTokenType(context) == TokenType::StringLiterial)
    {
        file = AdvanceToken(context).Content;
    }
    else if (PeekTokenType(context) == TokenType::IntLiterial)
    {
        // Note(tfoley): GLSL allows the "source string" to be indicated by an integer
        // TODO(tfoley): Figure out a better way to handle this, if it matters
        file = AdvanceToken(context).Content;
    }
    else
    {
        Expect(context, TokenType::StringLiterial, Diagnostics::expectedTokenInPreprocessorDirective);
        return;
    }

    // TODO(tfoley): set line number and file here
}

// Handle a `#pragma` directive
static void HandlePragmaDirective(PreprocessorDirectiveContext* context)