1 files changed, 75 insertions, 1 deletions
diff --git a/preproc.h b/preproc.h
index 6dca467..1ba76cf 100644
--- a/preproc.h
+++ b/preproc.h
@@ -1,11 +1,85 @@
 #pragma once
 
-#include "defs.h"
 #include "utils.h"
 
+typedef struct Region Region;
+
+
+// Lexing stage
+typedef enum {
+    UN_Q,
+    SINGLE_Q,
+    DOUBLE_Q,
+} QuotationMode;
+
+typedef enum {
+    LITERAL,
+    REGION_EXP,
+    VAR_EXP,    // TODO: Later include other exps
+} ChunkKind;
+
+typedef struct {
+    ChunkKind kind;
+    QuotationMode qmode;
+    union {
+        char* literal_str;
+        Region* reg_ptr;
+        char* varname;
+    } as;
+} Chunk;
+DECLARE_MAYBE(Chunk, MaybeChunk);
+DECLARE_VEC(Chunk*, Word)
+
+typedef enum {
+    TOK_WORD,
+    TOK_SPECIAL,
+    TOK_PROCSUB_IN,
+    TOK_PROCSUB_OUT,
+} TokenKind;
+
+typedef enum {
+    PIPE,
+    WRITE_REDIR_TRUNC,
+    WRITE_REDIR_APPEND,
+    READ_REDIR,
+    EOL,
+} SpecialToken;
+DECLARE_MAYBE(SpecialToken, MaybeSpecialToken)  
+
+typedef struct {
+    TokenKind kind;
+
+    union {
+        Word word;
+        SpecialToken spec; 
+        Region* procsub_region;
+    } as;
+} Token;
+
+
+DECLARE_VEC(Token*, TokenPtrVec)
+ 
+
+typedef enum {
+    CMDS,
+    ARITHM,
+} RegionMode;
+
+struct Region {
+    RegionMode mode;
+    TokenPtrVec tokens; 
+};
+DECLARE_VEC(Region, RegionVec)
+
+
+
 DECLARE_VEC(Chunk, ChunkVec)
 DECLARE_VEC(Token, TokenVec)
 
+
+
+// Lexing
+
 typedef struct {
     RegionVec regions;
     TokenVec tokens;