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#ifndef CRBC_ABSTR_H
#define CRBC_ABSTR_H
#include <stdio.h> // FILE, fprintf()
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
// ===== EXPRESSIONS =====
enum ExprKind {
EXPR_INT, EXPR_BOOL,
EXPR_CHAR, EXPR_STRING,
EXPR_IDENT
};
// fwd.
typedef struct Expr Expr;
typedef struct ExprInt ExprInt;
typedef struct ExprChar ExprChar;
typedef struct ExprBool ExprBool;
typedef struct ExprString ExprString;
typedef struct ExprIdent ExprIdent;
typedef struct ExprBinary ExprBinary;
struct Expr {
enum ExprKind kind;
union {
ExprInt *intLiteral;
ExprBool *boolLiteral;
ExprChar *charLiteral;
ExprString *stringLiteral;
ExprIdent *ident;
} as;
};
struct ExprInt {
int value;
};
//
struct ExprChar {
char value;
};
//
struct ExprBool {
bool value;
};
//
struct ExprString {
char *value;
};
//
struct ExprIdent {
char *name;
};
//
struct ExprBinary {
Expr *left;
Expr *right;
char op;
};
// ===== STATEMENTS =====
typedef struct Stmt Stmt;
typedef struct Block Block;
struct Stmt {
int _dummy;
};
struct Block {
int _dummy;
};
// ===== DECLARATIONS =====
enum DeclKind {
DECL_VAR,
DECL_FUNC,
DECL_TYPE_STRUCT,
DECL_TYPE_ENUM,
DECL_TYPE_UNION
};
// fwd.
typedef struct Decl Decl;
typedef struct DeclVar DeclVar;
typedef struct DeclFunc DeclFunc;
typedef struct DeclTypeStruct DeclTypeStruct;
typedef struct EnumMember EnumMember;
typedef struct DeclTypeEnum DeclTypeEnum;
typedef struct DeclTypeUnion DeclTypeUnion;
struct Decl {
enum DeclKind kind;
union {
DeclVar *var;
DeclFunc *func;
DeclTypeStruct *typeStruct;
DeclTypeEnum *typeEnum;
DeclTypeUnion *typeUnion;
} as;
};
// variable declaration
struct DeclVar {
char *ident;
char *type; // TODO: replace with Type*
Expr *init; // NULL => declaration only
};
struct DeclFunc {
char *ident;
char *return_type; // NULL => inferred
char *params; // TODO: param list
Block *body; // NULL => forward declaration
};
struct DeclTypeStruct {
char *ident;
char *members; // TODO: member list
};
struct EnumMember {
char *name;
char *value; // NULL => implicit
};
struct DeclTypeEnum {
char *ident;
EnumMember *members;
};
// union type declaration
struct DeclTypeUnion {
char *ident;
char *members; // TODO: member list
};
// ===== FUNCTIONS =====
static inline Decl *DeclareVariable(const char *ident, const char *type, Expr *init) {
Decl *decl = malloc(sizeof *decl);
DeclVar *var = malloc(sizeof *var);
var->ident = strdup(ident);
var->type = type ? strdup(type) : NULL;
var->init = init;
decl->kind = DECL_VAR;
decl->as.var = var;
return decl;
}
static inline Expr *ExprIntLiteral(int value) {
Expr *expr = malloc(sizeof *expr);
ExprInt *lit = malloc(sizeof *lit);
lit->value = value;
expr->kind = EXPR_INT;
expr->as.intLiteral = lit;
return expr;
}
#endif
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