57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/* ast.h */
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#pragma once
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#ifndef _LLP_AST_H_
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#define _LLP_AST_H
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#include <inttypes.h>
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#include <stdio.h>
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struct AST {
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enum AST_type { AST_BINOP, AST_UNOP, AST_LIT } type;
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union {
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struct binop {
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enum binop_type { BIN_PLUS, BIN_MINUS, BIN_MUL, BIN_DIV } type;
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struct AST *left, *right;
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} as_binop;
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struct unop {
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enum unop_type { UN_NEG } type;
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struct AST *operand;
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} as_unop;
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struct literal {
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int64_t value;
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} as_literal;
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};
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};
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struct AST *newnode(struct AST ast);
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struct AST _lit(int64_t value);
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struct AST *lit(int64_t value);
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struct AST _unop(enum unop_type type, struct AST *operand);
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struct AST *unop(enum unop_type type, struct AST *operand);
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struct AST _binop(enum binop_type type, struct AST *left, struct AST *right);
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struct AST *binop(enum binop_type type, struct AST *left, struct AST *right);
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#define DECLARE_BINOP(fun, code) \
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static struct AST *fun(struct AST *left, struct AST *right) { \
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return binop(BIN_##code, left, right); \
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}
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DECLARE_BINOP(add, PLUS)
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DECLARE_BINOP(mul, MUL)
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DECLARE_BINOP(sub, MINUS)
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DECLARE_BINOP(divide, DIV)
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#undef DECLARE_BINOP
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#define DECLARE_UNOP(fun, code) \
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static struct AST *fun(struct AST *operand) { \
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return unop(UN_##code, operand); \
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}
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DECLARE_UNOP(neg, NEG)
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#undef DECLARE_UNOP
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void print_ast(FILE *f, struct AST *ast);
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int64_t calc_ast(struct AST *ast);
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void p_print_ast(FILE *f, struct AST *ast);
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#endif
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