feat: proc macro C api

src/macros/c_api.c

@@ -0,0 +1,96 @@
+#include <stddef.h>
+
+// This file defines all the data required to compile proc macro shared object
+
+typedef enum {
+    T_IDENT,
+    T_INTEGER,
+    T_STRING,
+
+    T_ASSIGN,
+    T_PLUS,
+    T_MINUS,
+    T_BANG,
+    T_ASTERISK,
+    T_SLASH,
+    T_ARROW,
+    T_PERIOD,
+    T_TILDE,
+    T_AMPERSAND,
+    T_BAR,
+    T_EQUAL,
+    T_NOTEQUAL,
+    T_LESSTHAN,
+    T_GREATERTHAN,
+    T_LESSEQUAL,
+    T_GREATEREQUAL,
+    T_AND,
+    T_OR,
+    T_SHL,
+    T_SHR,
+    T_COMMA,
+    T_SEMICOLON,
+    T_COLON,
+    T_LPAREN,
+    T_RPAREN,
+    T_LBRACE,
+    T_RBRACE,
+    T_LBRACKET,
+    T_RBRACKET,
+
+    T_CONST,
+    T_TRUE,
+    T_FALSE,
+    T_LET,
+    T_FN,
+    T_ENUM,
+    T_STRUCT,
+    T_IF,
+    T_WHILE,
+    T_FOR,
+    T_ELSE,
+    T_RETURN,
+    T_AS,
+    T_CONTINUE,
+    T_BREAK,
+
+    T_U8,
+    T_U16,
+    T_U32,
+    T_U64,
+    T_I8,
+    T_I16,
+    T_I32,
+    T_I64,
+    T_USIZE,
+    T_ISIZE,
+    T_BOOL,
+    T_VOID,
+
+    T_NULL,
+} TokenTreeTag;
+
+typedef struct {
+    TokenTreeTag tag;
+    char *payload;
+} Token;
+
+typedef struct {
+    void *ptr;
+    size_t len;
+} Slice;
+
+typedef Slice (*MacroFn)(Slice);
+
+typedef struct {
+    const char *name;
+    MacroFn fn;
+} Macro;
+
+Macro _macros[] = {};
+
+// Compiler expects macros symbol to be defined in a shared object
+Slice macros = {
+    .ptr = &_macros,
+    .len = sizeof(_macros) / sizeof(_macros[0])
+};