Add `-vet-unused-variables` and ``-vet-unused-imports` (`-vet-unused` is both)

src/build_settings.cpp

@@ -272,13 +272,16 @@ enum BuildPath : u8 {
 };
 
 enum VetFlags : u64 {
-	VetFlag_NONE       = 0,
-	VetFlag_Unused     = 1u<<0, // 1
-	VetFlag_Shadowing  = 1u<<1, // 2
-	VetFlag_UsingStmt  = 1u<<2, // 4
-	VetFlag_UsingParam = 1u<<3, // 8
-	VetFlag_Style      = 1u<<4, // 16
-	VetFlag_Semicolon  = 1u<<5, // 32
+	VetFlag_NONE            = 0,
+	VetFlag_Shadowing       = 1u<<0,
+	VetFlag_UsingStmt       = 1u<<1,
+	VetFlag_UsingParam      = 1u<<2,
+	VetFlag_Style           = 1u<<3,
+	VetFlag_Semicolon       = 1u<<4,
+	VetFlag_UnusedVariables = 1u<<5,
+	VetFlag_UnusedImports   = 1u<<6,
+
+	VetFlag_Unused = VetFlag_UnusedVariables|VetFlag_UnusedImports,
 
 	VetFlag_All = VetFlag_Unused|VetFlag_Shadowing|VetFlag_UsingStmt,
 
@@ -288,6 +291,10 @@ enum VetFlags : u64 {
 u64 get_vet_flag_from_name(String const &name) {
 	if (name == "unused") {
 		return VetFlag_Unused;
+	} else if (name == "unused-variables") {
+		return VetFlag_UnusedVariables;
+	} else if (name == "unused-imports") {
+		return VetFlag_UnusedImports;
 	} else if (name == "shadowing") {
 		return VetFlag_Shadowing;
 	} else if (name == "using-stmt") {

src/checker.cpp

@@ -728,7 +728,10 @@ gb_internal void check_scope_usage(Checker *c, Scope *scope, u64 vet_flags) {
 		} else if (vet_flags) {
 			switch (ve.kind) {
 			case VettedEntity_Unused:
-				if (vet_flags & VetFlag_Unused) {
+				if (e->kind == Entity_Variable && (vet_flags & VetFlag_UnusedVariables) != 0) {
+					error(e->token, "'%.*s' declared but not used", LIT(name));
+				}
+				if ((e->kind == Entity_ImportName || e->kind == Entity_LibraryName) && (vet_flags & VetFlag_UnusedImports) != 0) {
 					error(e->token, "'%.*s' declared but not used", LIT(name));
 				}
 				break;

src/main.cpp

@@ -253,6 +253,8 @@ enum BuildFlagKind {
 	BuildFlag_Vet,
 	BuildFlag_VetShadowing,
 	BuildFlag_VetUnused,
+	BuildFlag_VetUnusedImports,
+	BuildFlag_VetUnusedVariables,
 	BuildFlag_VetUsingStmt,
 	BuildFlag_VetUsingParam,
 	BuildFlag_VetStyle,
@@ -444,6 +446,8 @@ gb_internal bool parse_build_flags(Array<String> args) {
 
 	add_flag(&build_flags, BuildFlag_Vet,                     str_lit("vet"),                       BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_VetUnused,               str_lit("vet-unused"),                BuildFlagParam_None,    Command__does_check);
+	add_flag(&build_flags, BuildFlag_VetUnusedVariables,      str_lit("vet-unused-variables"),      BuildFlagParam_None,    Command__does_check);
+	add_flag(&build_flags, BuildFlag_VetUnusedImports,        str_lit("vet-unused-imports"),        BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_VetShadowing,            str_lit("vet-shadowing"),             BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_VetUsingStmt,            str_lit("vet-using-stmt"),            BuildFlagParam_None,    Command__does_check);
 	add_flag(&build_flags, BuildFlag_VetUsingParam,           str_lit("vet-using-param"),           BuildFlagParam_None,    Command__does_check);
@@ -1026,10 +1030,9 @@ gb_internal bool parse_build_flags(Array<String> args) {
 						case BuildFlag_UseSeparateModules:
 							build_context.use_separate_modules = true;
 							break;
-						case BuildFlag_NoThreadedChecker: {
+						case BuildFlag_NoThreadedChecker:
 							build_context.no_threaded_checker = true;
 							break;
-						}
 						case BuildFlag_ShowDebugMessages:
 							build_context.show_debug_messages = true;
 							break;
@@ -1037,12 +1040,14 @@ gb_internal bool parse_build_flags(Array<String> args) {
 							build_context.vet_flags |= VetFlag_All;
 							break;
 
-						case BuildFlag_VetUnused:     build_context.vet_flags |= VetFlag_Unused;     break;
-						case BuildFlag_VetShadowing:  build_context.vet_flags |= VetFlag_Shadowing;  break;
-						case BuildFlag_VetUsingStmt:  build_context.vet_flags |= VetFlag_UsingStmt;  break;
-						case BuildFlag_VetUsingParam: build_context.vet_flags |= VetFlag_UsingParam; break;
-						case BuildFlag_VetStyle:      build_context.vet_flags |= VetFlag_Style;      break;
-						case BuildFlag_VetSemicolon:  build_context.vet_flags |= VetFlag_Semicolon;  break;
+						case BuildFlag_VetUnusedVariables: build_context.vet_flags |= VetFlag_UnusedVariables; break;
+						case BuildFlag_VetUnusedImports:   build_context.vet_flags |= VetFlag_UnusedImports;   break;
+						case BuildFlag_VetUnused:          build_context.vet_flags |= VetFlag_Unused;          break;
+						case BuildFlag_VetShadowing:       build_context.vet_flags |= VetFlag_Shadowing;       break;
+						case BuildFlag_VetUsingStmt:       build_context.vet_flags |= VetFlag_UsingStmt;       break;
+						case BuildFlag_VetUsingParam:      build_context.vet_flags |= VetFlag_UsingParam;      break;
+						case BuildFlag_VetStyle:           build_context.vet_flags |= VetFlag_Style;           break;
+						case BuildFlag_VetSemicolon:       build_context.vet_flags |= VetFlag_Semicolon;       break;
 
 						case BuildFlag_IgnoreUnknownAttributes:
 							build_context.ignore_unknown_attributes = true;
@@ -1875,6 +1880,8 @@ gb_internal void print_show_help(String const arg0, String const &command) {
 		print_usage_line(2, "Does extra checks on the code.");
 		print_usage_line(2, "Extra checks include:");
 		print_usage_line(3, "-vet-unused");
+		print_usage_line(3, "-vet-unused-variables");
+		print_usage_line(3, "-vet-unused-imports");
 		print_usage_line(3, "-vet-shadowing");
 		print_usage_line(3, "-vet-using-stmt");
 		print_usage_line(0, "");
@@ -1883,6 +1890,14 @@ gb_internal void print_show_help(String const arg0, String const &command) {
 		print_usage_line(2, "Checks for unused declarations.");
 		print_usage_line(0, "");
 
+		print_usage_line(1, "-vet-unused-variables");
+		print_usage_line(2, "Checks for unused variable declarations.");
+		print_usage_line(0, "");
+
+		print_usage_line(1, "-vet-unused-imports");
+		print_usage_line(2, "Checks for unused import declarations.");
+		print_usage_line(0, "");
+
 		print_usage_line(1, "-vet-shadowing");
 		print_usage_line(2, "Checks for variable shadowing within procedures.");
 		print_usage_line(0, "");