Function HandleIfNDefDirective

Source/SpireCore/Preprocessor.cpp:1252–1262

Handle a `#ifndef` directive

// Handle a `#ifndef` directive
static void HandleIfNDefDirective(PreprocessorDirectiveContext* context)
{
    // Expect a raw identifier, so we can check if it is defined
    Token nameToken;
    if(!ExpectRaw(context, TokenType::Identifier, Diagnostics::expectedTokenInPreprocessorDirective, &nameToken))
        return;
    String name = nameToken.Content;

    // Check if the name is defined.
    BeginConditional(context, LookupMacro(context, name) == NULL);
}

// Handle a `#else` directive
static void HandleElseDirective(PreprocessorDirectiveContext* context)