1 files changed, 25 insertions, 0 deletions
diff --git a/Compiler/PreprocessingCharStream.cs b/Compiler/PreprocessingCharStream.cs
new file mode 100644
index 0000000..428cbff
--- /dev/null
+++ b/Compiler/PreprocessingCharStream.cs
@@ -0,0 +1,25 @@
+namespace Q1.Compiler;
+
+using Antlr4.Runtime;
+using Antlr4.Runtime.Misc;
+
+public class PreprocessingCharStream : ICharStream
+{
+    private readonly AntlrInputStream inner;
+
+    public PreprocessingCharStream(string filePath)
+    {
+        string preprocessed = Preprocessor.Process(filePath);
+        this.inner = new AntlrInputStream(preprocessed);
+    }
+
+    public int Index => this.inner.Index;
+    public int Size => this.inner.Size;
+    public string SourceName => this.inner.SourceName;
+    public void Consume() => this.inner.Consume();
+    public int LA(int i) => this.inner.LA(i);
+    public int Mark() => this.inner.Mark();
+    public void Release(int marker) => this.inner.Release(marker);
+    public void Seek(int index) => this.inner.Seek(index);
+    public string GetText(Interval interval) => this.inner.GetText(interval);
+}
+\ No newline at end of file