62 lines
946 B
C
62 lines
946 B
C
#ifndef AST_H
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#define AST_H
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// Forward declaration
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struct ast_node;
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enum unop_kind
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{
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UNOP_IDENTITY,
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UNOP_NEGATE,
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UNOP_FACT,
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};
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enum binop_kind
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{
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BINOP_PLUS,
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BINOP_MINUS,
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BINOP_TIMES,
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BINOP_DIVIDES,
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BINOP_POW,
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};
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struct unop_node
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{
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enum unop_kind op;
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struct ast_node *tree;
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};
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struct binop_node
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{
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enum binop_kind op;
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struct ast_node *lhs;
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struct ast_node *rhs;
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};
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struct ast_node
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{
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enum node_kind
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{
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NODE_UNOP,
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NODE_BINOP,
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NODE_NUM,
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} kind;
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union ast_val
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{
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struct unop_node un_op;
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struct binop_node bin_op;
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int num;
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} val;
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};
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struct ast_node *make_num(int val);
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struct ast_node *make_unop(enum unop_kind op, struct ast_node *tree);
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struct ast_node *make_binop(enum binop_kind op, struct ast_node *lhs,
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struct ast_node *rhs);
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void destroy_ast(struct ast_node *ast);
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#endif /* !AST_H */
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