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- typedef enum {
- NODE_COMMAND = 0,
- NODE_PIPE = 1,
- NODE_CONJ = 2,
- NODE_DISJ = 3,
- } NodeType;
- struct AST {
- NodeType type;
- union {
- char **tokens;
- struct {
- struct AST *l;
- struct AST *r;
- } child;
- } node;
- };
- extern char *operator_for[];
- struct AST* parse_tokens(region *r, char **tokens, int *bg_flag);
- struct AST* parse(region *r, string_port *port, int *bg_flag);
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