#ifndef PARSE_H
#define PARSE_H

#include <stddef.h>

typedef struct {
    char ch;
    int line;
    int col;
} SourceChar;

typedef struct {
    const char* text;
    size_t i;
    int line;
    int col;
} SourceCharIter;

void source_char_iter_init(SourceCharIter* r, const char* text);
SourceChar source_iter_next(SourceCharIter* r);

typedef struct {
    char ch;
    int line;
    int col;
} LslChar;

typedef struct {
    SourceCharIter* source_char_iter;
    SourceChar curr;
} LslCharIter;

void lsl_iter_init(LslCharIter* r, SourceCharIter* source_char_iter);
LslChar lsl_iter_next(LslCharIter* r);

typedef enum {
    Tok_Eof,
    Tok_Eol,
    Tok_Ident,
    Tok_Int,
    Tok_Str,
    Tok_Char,
    Tok_HeaderName,
    Tok_Newline = '\n', // NOTE: has value 10
    Tok_Semicolon = ';',
    Tok_LParen = '(',
    Tok_RParen = ')',
    Tok_LBrace = '{',
    Tok_RBrace = '}',
} TokTy;

typedef struct {
    TokTy ty;
    char* text;
    int line;
    int col;
} Tok;

typedef struct {
    LslCharIter* lsl_char_iter;
    LslChar curr;
} Lexer;

void lexer_init(Lexer* r, LslCharIter* lsl_char_iter);
Tok lexer_next(Lexer* l);

#endif