21sh/ll-expr/src/ast/ast.c


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#include "ast.h"

#include <err.h>
#include <stdlib.h>

struct ast *ast_new(enum ast_type type)
{
    struct ast *new = calloc(1, sizeof(struct ast));
    if (!new)
        return NULL;
    new->type = type;
    return new;
}

void ast_free(struct ast *ast)
{
    if (ast == NULL)
        return;

    ast_free(ast->left);
    ast->left = NULL;

    ast_free(ast->right);
    ast->right = NULL;

    free(ast);
}