parseIf method
Implementation
Statement parseIf() {
int start = token?.startOffset??0;
int line = token?.line??0;
assert(token?.text == 'if');
consume(Token.NAME);
consume(Token.LPAREN);
Expression condition = parseExpression();
consume(Token.RPAREN);
Statement thenBody = parseStatement();
Statement? elseBody;
if (tryName('else')) {
elseBody = parseStatement();
}
return new IfStatement(condition, thenBody, elseBody)
..start = start
..end = endOffset
..line = line;
}