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Lecture 11

# Term dan grossman dan grossman while next symbol is

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Unformatted text preview: CSE341: Programming Languages Languages // parse // parse L// term 1:= factor { * factor }* ecture : // expr ::= term { + Lecture 1 term }* Course ExprNode exprCourse Mechanics Mechanics () { ExprNode term() { ML Variable Bindings p2; ExprNode op1, op2; ML Variable Bindings ExprNode op1, o op1 = term(); op1 = factor(); Dan Grossman symbol is TIMES) { while (next symbol is PLUS) { while (next Dan Grossman FallgetNextToken(); getNextToken(); Fall 2011 2011 op2 = term(); op2 = factor(); op1 = CreatePlusNode(op1, op2); op1 = CreateMultNode(op1, op2); } } return op1; return op1; } } Winter 2013 UW CSE 401 (Michael Ringenburg) 31 Code for Expressions (2) CSE341: Programming CSE341: Programming Languages Languages // parse Lecture 1 Lecture 1 // factor ::= int | id | ( expr ) c Course Mechanics Course Mechanicsase ID: ExprNode factor() { res = p Bindings ML Variable rocessIdenVﬁer(); ExprNode res; Variable Bindings ML break; switch(nextToken) { case LPAREN: Dan Grossman Dan Grossman getNextToken(); case INT: Fall 2011 Fall 2011 res = expr(); res = processIntConstant(); getNextToken();...
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