search for interface files when using -y

.gitignore

@@ -11,3 +11,4 @@ cmake-build-*/
 prefix/
 CMakeLists.txt.user
 CMakeUserPresets.json
+.ccls

include/slang/parsing/ParserMetadata.h

@@ -44,6 +44,9 @@ struct SLANG_EXPORT ParserMetadata {
     /// A list of all class declarations parsed.
     std::vector<const syntax::ClassDeclarationSyntax*> classDecls;
 
+    /// A list of all interface port headers parsed.
+    std::vector<const syntax::InterfacePortHeaderSyntax*> interfacePorts;
+
     /// The EOF token, if one has already been consumed by the parser.
     /// Otherwise an empty token.
     Token eofToken;

source/driver/Driver.cpp

@@ -612,6 +612,12 @@ bool Driver::parseAllSources() {
                         missing.emplace(name);
                 }
             }
+
+            for (auto intf : meta.interfacePorts) {
+                std::string_view name = intf->nameOrKeyword.valueText();
+                if (knownNames.find(name) == knownNames.end() && name != "interface")
+                    missing.emplace(name);
+            }
         };
 
         for (auto& tree : syntaxTrees)

source/parsing/Parser.cpp

@@ -82,7 +82,23 @@ AnsiPortListSyntax& Parser::parseAnsiPortList(Token openParen) {
                                                     TokenKind::Comma, closeParen,
                                                     RequireItems::False, diag::ExpectedAnsiPort,
                                                     [this] { return &parseAnsiPort(); });
-    return factory.ansiPortList(openParen, buffer.copy(alloc), closeParen);
+    AnsiPortListSyntax* portList = &factory.ansiPortList(openParen, buffer.copy(alloc), closeParen);
+
+    // put interface ports in metadata
+
+    for (auto port : portList->ports) {
+        if (port->kind != SyntaxKind::ImplicitAnsiPort)
+            continue;
+        ImplicitAnsiPortSyntax* ansiport = &port->as<ImplicitAnsiPortSyntax>();
+
+        if (ansiport->header->kind != SyntaxKind::InterfacePortHeader)
+            continue;
+        InterfacePortHeaderSyntax* goodheader = &ansiport->header->as<InterfacePortHeaderSyntax>();
+
+        meta.interfacePorts.push_back(goodheader);
+    }
+
+    return *portList;
 }
 
 ModuleHeaderSyntax& Parser::parseModuleHeader() {

source/parsing/ParserMetadata.cpp

@@ -45,6 +45,11 @@ class MetadataVisitor : public SyntaxVisitor<MetadataVisitor> {
         visitDefault(syntax);
     }
 
+    void handle(const InterfacePortHeaderSyntax& syntax) {
+        meta.interfacePorts.push_back(&syntax);
+        visitDefault(syntax);
+    }
+
     void handle(const DefParamSyntax& syntax) {
         meta.hasDefparams = true;
         visitDefault(syntax);