Merge pull request #544 from abertelrud/factor-out-c99-identifier-mangling

Move the details of C99 identifier mangling out of `ProjectModel`

Author: abertelrud

Sources/Commands/init.swift

@@ -55,9 +55,10 @@ final class InitPackage {
 
     init(mode: InitMode) throws {
         self.mode = mode
-        pkgname = rootd.basename
-        // Also validates that the name is valid.
-        moduleName = try c99name(name: rootd.basename)
+        let dirname = rootd.basename
+        assert(!dirname.isEmpty)  // a base name is never empty
+        self.pkgname = dirname
+        self.moduleName = dirname.mangledToC99ExtendedIdentifier()
     }
 
     func writePackageStructure() throws {

Sources/PackageModel/Module.swift

@@ -63,7 +63,7 @@ public class Module: ModuleProtocol {
         self.type = type
         self.sources = sources
         self.dependencies = []
-        self.c99name = try PackageModel.c99name(name: self.name)
+        self.c99name = self.name.mangledToC99ExtendedIdentifier()
         self.isTest = isTest
     }