49 lines
1.6 KiB
Java
Executable File
49 lines
1.6 KiB
Java
Executable File
package frontend.ast.func;
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import frontend.ast.Node;
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import frontend.ast.SyntaxType;
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import frontend.lexer.TokenStream;
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import frontend.lexer.TokenType;
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import midend.symbol.Symbol;
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import midend.symbol.SymbolType;
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import midend.symbol.ArraySymbol;
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import error.Errors;
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import frontend.ast.token.TokenNode;
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import error.ErrorType;
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import error.Error;
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public class FuncFParam extends Node {
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public FuncFParam(TokenStream ts) {
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super(SyntaxType.FUNC_FORMAL_PARAM, ts);
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}
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public void parse(Errors errors) {
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TokenNode intkk = new TokenNode(this.ts);
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addChild(intkk);
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TokenNode ident = new TokenNode(this.ts);
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addChild(ident);
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if (getCurrToken().getType() == TokenType.LBRACK) {
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TokenNode lbrack = new TokenNode(this.ts);
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addChild(lbrack);
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if (getCurrToken().getType() == TokenType.RBRACK) {
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TokenNode rbrack = new TokenNode(this.ts);
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addChild(rbrack);
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} else {
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errors.addError(new Error(this.ts.peek(-1).getLine(), ErrorType.k));
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}
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}
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}
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public Symbol getSymbol() {
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if (getChildren().size() == 2) {
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TokenNode tn = (TokenNode) getChild(1);
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return new Symbol(tn.getName(), SymbolType.INT, tn.getLine());
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} else {
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TokenNode tn = (TokenNode) getChild(1);
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return new ArraySymbol(tn.getName(), SymbolType.INT_ARRAY, tn.getLine(), -1);
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//这里不求维数，因为函数形参为数组只是相当于一个指针
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}
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}
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} |