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This commit is contained in:
petermlm
2016-04-17 18:51:04 +01:00
parent af6489125f
commit aa17e0723e
2 changed files with 67 additions and 67 deletions
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106
examples/tree_traversal.c
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@@ -2,72 +2,72 @@
int main(int argc, char *argv[]) {
mpc_parser_t *Input = mpc_new("input");
mpc_parser_t *Node = mpc_new("node");
mpc_parser_t *Leaf = mpc_new("leaf");
mpc_ast_t *ast, *tree, *child, *child_sub;
mpc_result_t r;
int index, lb;
mpc_parser_t *Input = mpc_new("input");
mpc_parser_t *Node = mpc_new("node");
mpc_parser_t *Leaf = mpc_new("leaf");
mpc_ast_t *ast, *tree, *child, *child_sub;
mpc_result_t r;
int index, lb;
mpca_lang(MPCA_LANG_PREDICTIVE,
" node : '(' <node> ',' /foo/ ',' <node> ')' | <leaf>;"
" leaf : /bar/;"
" input : /^/ <node> /$/;",
Node, Leaf, Input, NULL);
mpca_lang(MPCA_LANG_PREDICTIVE,
" node : '(' <node> ',' /foo/ ',' <node> ')' | <leaf>;"
" leaf : /bar/;"
" input : /^/ <node> /$/;",
Node, Leaf, Input, NULL);
if (argc > 1) {
if (mpc_parse_contents(argv[1], Input, &r)) {
ast = r.output;
} else {
mpc_err_print(r.error);
mpc_err_delete(r.error);
mpc_cleanup(3, Node, Leaf, Input);
return EXIT_FAILURE;
}
if (argc > 1) {
if (mpc_parse_contents(argv[1], Input, &r)) {
ast = r.output;
} else {
if (mpc_parse_pipe("<stdin>", stdin, Input, &r)) {
ast = r.output;
} else {
mpc_err_print(r.error);
mpc_err_delete(r.error);
mpc_cleanup(3, Node, Leaf, Input);
return EXIT_FAILURE;
}
mpc_err_print(r.error);
mpc_err_delete(r.error);
mpc_cleanup(3, Node, Leaf, Input);
return EXIT_FAILURE;
}
/* Get index or child of tree */
tree = ast->children[1];
} else {
index = mpc_ast_get_index(tree, "node|>");
child = mpc_ast_get_child(tree, "node|>");
if(child == NULL) {
mpc_cleanup(3, Node, Leaf, Input);
mpc_ast_delete(ast);
return EXIT_FAILURE;
if (mpc_parse_pipe("<stdin>", stdin, Input, &r)) {
ast = r.output;
} else {
mpc_err_print(r.error);
mpc_err_delete(r.error);
mpc_cleanup(3, Node, Leaf, Input);
return EXIT_FAILURE;
}
printf("Index: %d; Child: \"%s\"\n", index, child->tag);
}
/* Get multiple indexes or children of trees */
index = mpc_ast_get_index_lb(child, "node|leaf|regex", 0);
child_sub = mpc_ast_get_child_lb(child, "node|leaf|regex", 0);
/* Get index or child of tree */
tree = ast->children[1];
while(index != -1) {
printf("-- Index: %d; Child: \"%s\"\n", index, child_sub->tag);
index = mpc_ast_get_index(tree, "node|>");
child = mpc_ast_get_child(tree, "node|>");
lb = index + 1;
index = mpc_ast_get_index_lb(child, "node|leaf|regex", lb);
child_sub = mpc_ast_get_child_lb(child, "node|leaf|regex", lb);
}
/* Clean up and return */
if(child == NULL) {
mpc_cleanup(3, Node, Leaf, Input);
mpc_ast_delete(ast);
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
printf("Index: %d; Child: \"%s\"\n", index, child->tag);
/* Get multiple indexes or children of trees */
index = mpc_ast_get_index_lb(child, "node|leaf|regex", 0);
child_sub = mpc_ast_get_child_lb(child, "node|leaf|regex", 0);
while(index != -1) {
printf("-- Index: %d; Child: \"%s\"\n", index, child_sub->tag);
lb = index + 1;
index = mpc_ast_get_index_lb(child, "node|leaf|regex", lb);
child_sub = mpc_ast_get_child_lb(child, "node|leaf|regex", lb);
}
/* Clean up and return */
mpc_cleanup(3, Node, Leaf, Input);
mpc_ast_delete(ast);
return EXIT_SUCCESS;
}