📄 parser.html
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<A NAME="declbegsys"><!-- --></A><H3>
declbegsys</H3>
<PRE>
private java.util.BitSet <B>declbegsys</B></PRE>
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<DL>
</DL>
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<A NAME="statbegsys"><!-- --></A><H3>
statbegsys</H3>
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private java.util.BitSet <B>statbegsys</B></PRE>
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</DL>
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<A NAME="facbegsys"><!-- --></A><H3>
facbegsys</H3>
<PRE>
private java.util.BitSet <B>facbegsys</B></PRE>
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<DL>
</DL>
</DL>
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<A NAME="symtype"><!-- --></A><H3>
symtype</H3>
<PRE>
private int <B>symtype</B></PRE>
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<DD>当前符号的符号码，由nextsym()读入
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<DT><B>See Also:</B><DD><A HREF="Parser.html#nextsym()"><CODE>nextsym()</CODE></A></DL>
</DL>
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<A NAME="sym"><!-- --></A><H3>
sym</H3>
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private <A HREF="Symbol.html" title="class in <Unnamed>">Symbol</A> <B>sym</B></PRE>
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<DD>当前符号，由nextsym()读入
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<DL>
<DT><B>See Also:</B><DD><A HREF="Parser.html#nextsym()"><CODE>nextsym()</CODE></A></DL>
</DL>
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<A NAME="dx"><!-- --></A><H3>
dx</H3>
<PRE>
private int <B>dx</B></PRE>
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<DD>当前作用域的堆栈帧大小，或者说数据大小（data size）
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</DL>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<B>Constructor Detail</B></FONT></TH>
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<A NAME="Parser(Scanner, Table, Interpreter)"><!-- --></A><H3>
Parser</H3>
<PRE>
public <B>Parser</B>(<A HREF="Scanner.html" title="class in <Unnamed>">Scanner</A> l,
<A HREF="Table.html" title="class in <Unnamed>">Table</A> t,
<A HREF="Interpreter.html" title="class in <Unnamed>">Interpreter</A> i)</PRE>
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<DD>构造并初始化语法分析器，这里包含了C语言版本中init()函数的一部分代码
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<DT><B>Parameters:</B><DD><CODE>l</CODE> - 编译器的词法分析器<DD><CODE>t</CODE> - 编译器的符号表<DD><CODE>i</CODE> - 编译器的目标代码生成器</DL>
</DL>
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<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
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<A NAME="parse()"><!-- --></A><H3>
parse</H3>
<PRE>
public void <B>parse</B>()</PRE>
<DL>
<DD>启动语法分析过程，此前必须先调用一次nextsym()
<P>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="Parser.html#nextsym()"><CODE>nextsym()</CODE></A></DL>
</DD>
</DL>
<HR>
<A NAME="nextsym()"><!-- --></A><H3>
nextsym</H3>
<PRE>
public void <B>nextsym</B>()</PRE>
<DL>
<DD>获得下一个语法符号，这里只是简单调用一下getsym()
<P>
<DD><DL>
</DL>
</DD>
</DL>
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<A NAME="test(java.util.BitSet, java.util.BitSet, int)"><!-- --></A><H3>
test</H3>
<PRE>
void <B>test</B>(java.util.BitSet s1,
java.util.BitSet s2,
int errcode)</PRE>
<DL>
<DD>测试当前符号是否合法
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>s1</CODE> - 我们需要的符号<DD><CODE>s2</CODE> - 如果不是我们需要的，则需要一个补救用的集合<DD><CODE>errcode</CODE> - 错误号</DL>
</DD>
</DL>
<HR>
<A NAME="block(int, java.util.BitSet)"><!-- --></A><H3>
block</H3>
<PRE>
public void <B>block</B>(int lev,
java.util.BitSet fsys)</PRE>
<DL>
<DD>分析<分程序>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>lev</CODE> - 当前分程序所在层<DD><CODE>fsys</CODE> - 当前模块后跟符号集</DL>
</DD>
</DL>
<HR>
<A NAME="constdeclaration(int)"><!-- --></A><H3>
constdeclaration</H3>
<PRE>
void <B>constdeclaration</B>(int lev)</PRE>
<DL>
<DD>分析<常量说明部分>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>lev</CODE> - 当前所在的层次</DL>
</DD>
</DL>
<HR>
<A NAME="vardeclaration(int)"><!-- --></A><H3>
vardeclaration</H3>
<PRE>
void <B>vardeclaration</B>(int lev)</PRE>
<DL>
<DD>分析<变量说明部分>
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<DD><DL>
<DT><B>Parameters:</B><DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="statement(java.util.BitSet, int)"><!-- --></A><H3>
statement</H3>
<PRE>
void <B>statement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseWhileStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseWhileStatement</H3>
<PRE>
private void <B>parseWhileStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<当型循环语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseBeginStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseBeginStatement</H3>
<PRE>
private void <B>parseBeginStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<复合语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseIfStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseIfStatement</H3>
<PRE>
private void <B>parseIfStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<条件语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseCallStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseCallStatement</H3>
<PRE>
private void <B>parseCallStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<过程调用语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseWriteStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseWriteStatement</H3>
<PRE>
private void <B>parseWriteStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<写语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseReadStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseReadStatement</H3>
<PRE>
private void <B>parseReadStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<读语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="parseAssignStatement(java.util.BitSet, int)"><!-- --></A><H3>
parseAssignStatement</H3>
<PRE>
private void <B>parseAssignStatement</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<赋值语句>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="expression(java.util.BitSet, int)"><!-- --></A><H3>
expression</H3>
<PRE>
private void <B>expression</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<表达式>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="term(java.util.BitSet, int)"><!-- --></A><H3>
term</H3>
<PRE>
private void <B>term</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<项>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="factor(java.util.BitSet, int)"><!-- --></A><H3>
factor</H3>
<PRE>
private void <B>factor</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<因子>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="condition(java.util.BitSet, int)"><!-- --></A><H3>
condition</H3>
<PRE>
private void <B>condition</B>(java.util.BitSet fsys,
int lev)</PRE>
<DL>
<DD>分析<条件>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fsys</CODE> - 后跟符号集<DD><CODE>lev</CODE> - 当前层次</DL>
</DD>
</DL>
<HR>
<A NAME="debug(java.lang.String)"><!-- --></A><H3>
debug</H3>
<PRE>
void <B>debug</B>(java.lang.String msg)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
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