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#ifndef AST_H
#define AST_H
#include "scope.h"
struct stmt_node;
struct expr_node;
struct type_ref_node {
struct type_ref type;
};
struct int_lit_node {
integral_t val;
};
struct float_lit_node {
floating_t val;
};
struct char_lit_node {
char val;
};
struct str_lit_node {
char* val;
};
struct var_ref_node {
struct var_def* def_ref;
};
struct var_decl_node {
struct type_ref_node type;
struct var_def* def_ref;
struct expr_node* initial_value;
};
struct assign_node {
struct expr_node* lval;
struct expr_node* rval;
};
struct expr_list_node {
struct expr_node* expr;
struct expr_list_node* next;
};
struct call_node {
/* TODO: function pointers */
struct fn_decl_node* called_fn_ref; /* borrowed */
struct expr_list_node* args;
};
struct unary_node {
enum {
UNARY_NEG,
} op;
struct expr_node* expr;
};
struct binary_node {
enum {
BINARY_ADD,
BINARY_SUB,
BINARY_MUL,
BINARY_DIV,
} op;
struct expr_node* lhs;
struct expr_node* rhs;
};
struct expr_node {
enum {
EXPR_INT_LIT,
EXPR_FLOAT_LIT,
EXPR_CHAR_LIT,
EXPR_STR_LIT,
EXPR_VAR_REF,
EXPR_ASSIGN,
EXPR_CALL,
EXPR_UNARY,
EXPR_BINARY,
} type;
union {
struct int_lit_node int_lit;
struct float_lit_node float_lit;
struct char_lit_node char_lit;
struct str_lit_node str_lit;
struct var_ref_node var_ref;
struct assign_node assign;
struct call_node call;
struct unary_node unary;
struct binary_node binary;
} inner;
const struct type_def* resolved_type;
};
struct group_node {
struct stmt_node* head;
struct scope* scope;
};
struct decl_list_node {
struct var_decl_node* decl;
struct decl_list_node* next;
};
struct fn_decl_node {
struct type_ref_node return_type;
char* name;
struct decl_list_node* args;
struct group_node body;
struct scope* scope;
const struct type_def* resolved_return_type;
};
struct return_node {
struct expr_node* ret_val; /* null to return void */
};
struct if_node {
struct expr_node* cond;
struct stmt_node* true_branch;
struct stmt_node* false_branch;
struct scope* scope;
};
struct loop_init_node {
enum {
INIT_EXPR_LIST,
INIT_DECL,
} type;
union {
struct expr_list_node* expr_list;
struct var_decl_node* decl;
};
};
struct loop_node {
struct loop_init_node* init; /* null if absent */
struct expr_node* cond; /* null if absent */
struct expr_node* incr; /* null if absent */
struct stmt_node* body;
struct scope* scope;
};
struct stmt_node {
enum {
STMT_EMPTY,
STMT_EXPR,
STMT_VAR_DECL,
STMT_RETURN,
STMT_GROUP,
STMT_IF,
STMT_LOOP,
} type;
union {
struct expr_node expr;
struct var_decl_node var_decl;
struct return_node return_;
struct group_node group;
struct if_node if_;
struct loop_node loop;
} inner;
struct stmt_node* next;
};
struct root_node {
enum {
ROOT_FN_DECL,
} type;
union {
struct fn_decl_node fn_decl;
} inner;
struct root_node* next;
};
struct ast {
struct root_node* root_node;
struct scope* root_scope;
/* nice shortcuts to have */
const struct type_def* void_type;
const struct type_def* char_type;
const struct type_def* integral_type;
const struct type_def* decimal_type;
const struct type_def* pointer_type;
};
void ast_destroy(struct ast* ast);
#endif
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