33 lines
509 B
C
33 lines
509 B
C
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enum TokenType
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{
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IF, END, ID, NUM, READ, WrITE, UNTIL, ....
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}
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enum NodeKind { statement, expression };
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enum StatKind { if, repeat, assign, read, write };
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enum ExpKind { op, const, id };
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enum ExpType { void, integer, boolean };
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struct treenode
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{
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treenode* child[3]; //
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treenode* sibling; // <---- next statement...
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int lineno;
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NodeKind node_kind;
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union {
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statkind s;
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expkind e;
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} kind;
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union {
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TokenType Op;
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int val;
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char* name;
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} attr;
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exptype type; <- for type checking...
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};
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