exam3virtual_syntaxtree.xml

这是一个用java语言编写的小型C语言的语法分析器。

<?xml version="1.0"?>
<root>
    <tree line="1" nodetype="ClassDecl" nodestring="shape">
        <child>
            <tree line="2" nodetype="VarDecl" nodestring="a" vartype="int" modifier="" isArray="0" />
            <tree line="3" nodetype="FunDecl" nodestring="shape" rettype="void" modifier="constructor" />
            <tree line="4" nodetype="FunDecl" nodestring="draw" rettype="void" isVirtual="1">
                <child>
                    <tree line="4" nodetype="AssignStm" nodestring="=">
                        <child>
                            <tree line="4" nodetype="VarID" nodestring="a" isArray="0" />
                        </child>
                        <child>
                            <tree line="4" nodetype="ConstID" nodestring="0" />
                        </child>
                    </tree>
                </child>
            </tree>
        </child>
    </tree>
    <tree line="6" nodetype="ClassDecl" nodestring="line">
        <child>
            <tree line="6" nodetype="BaseClsID" nodestring="shape" modifier="public" />
        </child>
        <child>
            <tree line="7" nodetype="FunDecl" nodestring="line" rettype="void" modifier="constructor" />
            <tree line="8" nodetype="FunDecl" nodestring="draw" rettype="void">
                <child>
                    <tree line="8" nodetype="AssignStm" nodestring="=">
                        <child>
                            <tree line="8" nodetype="VarID" nodestring="a" isArray="0" />
                        </child>
                        <child>
                            <tree line="8" nodetype="ConstID" nodestring="1" />
                        </child>
                    </tree>
                </child>
            </tree>
        </child>
    </tree>
    <tree line="10" nodetype="ClassDecl" nodestring="circle">
        <child>
            <tree line="10" nodetype="BaseClsID" nodestring="shape" modifier="public" />
        </child>
        <child>
            <tree line="11" nodetype="FunDecl" nodestring="circle" rettype="void" modifier="constructor" />
            <tree line="12" nodetype="FunDecl" nodestring="draw" rettype="void">
                <child>
                    <tree line="12" nodetype="AssignStm" nodestring="=">
                        <child>
                            <tree line="12" nodetype="VarID" nodestring="a" isArray="0" />
                        </child>
                        <child>
                            <tree line="12" nodetype="ConstID" nodestring="2" />
                        </child>
                    </tree>
                </child>
            </tree>
        </child>
    </tree>
    <tree line="14" nodetype="FunDecl" nodestring="foo" rettype="void">
        <child>
            <tree line="14" nodetype="Para" nodestring="s" vartype="shape" isArray="0" />
        </child>
        <child>
            <tree line="15" nodetype="ObjectVar" nodestring="s">
                <child>
                    <tree line="15" nodetype="FunCall" nodestring="draw" />
                </child>
            </tree>
        </child>
    </tree>
    <tree line="17" nodetype="FunDecl" nodestring="main" rettype="void">
        <child>
            <tree line="18" nodetype="VarDecl" nodestring="s" vartype="shape" modifier="" isArray="0" />
            <tree line="18" nodetype="VarDecl" nodestring="l" vartype="shape" modifier="" isArray="0" />
            <tree line="18" nodetype="VarDecl" nodestring="c" vartype="shape" modifier="" isArray="0" />
            <tree line="19" nodetype="AssignStm" nodestring="=">
                <child>
                    <tree line="19" nodetype="VarID" nodestring="s" isArray="0" />
                </child>
                <child>
                    <tree line="19" nodetype="NewStm" nodestring="new">
                        <child>
                            <tree line="19" nodetype="FunCall" nodestring="shape" />
                        </child>
                    </tree>
                </child>
            </tree>
            <tree line="20" nodetype="AssignStm" nodestring="=">
                <child>
                    <tree line="20" nodetype="VarID" nodestring="l" isArray="0" />
                </child>
                <child>
                    <tree line="20" nodetype="NewStm" nodestring="new">
                        <child>
                            <tree line="20" nodetype="FunCall" nodestring="line" />
                        </child>
                    </tree>
                </child>
            </tree>
            <tree line="21" nodetype="AssignStm" nodestring="=">
                <child>
                    <tree line="21" nodetype="VarID" nodestring="c" isArray="0" />
                </child>
                <child>
                    <tree line="21" nodetype="NewStm" nodestring="new">
                        <child>
                            <tree line="21" nodetype="FunCall" nodestring="circle" />
                        </child>
                    </tree>
                </child>
            </tree>
            <tree line="22" nodetype="FunCall" nodestring="foo">
                <child>
                    <tree line="22" nodetype="VarID" nodestring="s" isArray="0" />
                </child>
            </tree>
            <tree line="23" nodetype="FunCall" nodestring="foo">
                <child>
                    <tree line="23" nodetype="VarID" nodestring="l" isArray="0" />
                </child>
            </tree>
            <tree line="24" nodetype="FunCall" nodestring="foo">
                <child>
                    <tree line="24" nodetype="VarID" nodestring="c" isArray="0" />
                </child>
            </tree>
        </child>
    </tree>
</root>