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<span style="color: #000080;font-style:italic;">--
-- demo\rosetta\Compiler\parse.e
-- =============================
--
-- The reusable part of parse.exw
--</span>
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">lex</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">tok</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">errd</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">args</span><span style="color: #0000FF;">={})</span>
<span style="color: #0000FF;">{</span><span style="color: #000000;">tok_line</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tok_col</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tok</span>
<span style="color: #000000;">error</span><span style="color: #0000FF;">(</span><span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span><span style="color: #000000;">args</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #008080;">global</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">toks</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">next_tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">toks</span><span style="color: #0000FF;">[</span><span style="color: #000000;">next_tok</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">next_tok</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">tok</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">tk</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">tk</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">s</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">errd</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%s: Expecting '%s', found '%s'\n"</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">s</span><span style="color: #0000FF;">],</span> <span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">tk</span><span style="color: #0000FF;">]})</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">p</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">node</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">op</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">switch</span> <span style="color: #000000;">op</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_LeftParen</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"expr"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tk_RightParen</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_sub</span><span style="color: #0000FF;">:</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_add</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">node</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">precedences</span><span style="color: #0000FF;">[</span><span style="color: #000000;">tk_neg</span><span style="color: #0000FF;">]);</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">op</span><span style="color: #0000FF;">==</span><span style="color: #000000;">tk_sub</span><span style="color: #0000FF;">?{</span><span style="color: #000000;">tk_neg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">node</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">}:</span><span style="color: #000000;">node</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_not</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_not</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">precedences</span><span style="color: #0000FF;">[</span><span style="color: #000000;">tk_not</span><span style="color: #0000FF;">]),</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">4</span><span style="color: #0000FF;">]}</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Integer</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Integer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">4</span><span style="color: #0000FF;">]}</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #008080;">default</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">errd</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Expecting a primary, found: %s\n"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">op</span><span style="color: #0000FF;">])</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">switch</span>
<span style="color: #000000;">op</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">narys</span><span style="color: #0000FF;">[</span><span style="color: #000000;">op</span><span style="color: #0000FF;">]=</span><span style="color: #000000;">BINARY</span>
<span style="color: #008080;">and</span> <span style="color: #000000;">precedences</span><span style="color: #0000FF;">[</span><span style="color: #000000;">op</span><span style="color: #0000FF;">]>=</span><span style="color: #000000;">p</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">x</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">op</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">precedences</span><span style="color: #0000FF;">[</span><span style="color: #000000;">op</span><span style="color: #0000FF;">]+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)}</span>
<span style="color: #000000;">op</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">x</span><span style="color: #0000FF;">;</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">paren_expr</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">msg</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_LeftParen</span><span style="color: #0000FF;">);</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #000000;">msg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_RightParen</span><span style="color: #0000FF;">);</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">t</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">s</span>
<span style="color: #008080;">switch</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_if</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">condition</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">paren_expr</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"If-cond"</span><span style="color: #0000FF;">);</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">ifblock</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">();</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">elseblock</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">;</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">==</span> <span style="color: #000000;">tk_else</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">elseblock</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">();</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_if</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">condition</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_if</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">ifblock</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">elseblock</span><span style="color: #0000FF;">}}</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_putc</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">paren_expr</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Prtc"</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_putc</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">}</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Putc"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_Semicolon</span><span style="color: #0000FF;">);</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_print</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Print"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tk_LeftParen</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">==</span> <span style="color: #000000;">tk_String</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Prints</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_String</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">4</span><span style="color: #0000FF;">]},</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">}</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #008080;">else</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Printi</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">),</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Sequence</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]!=</span><span style="color: #000000;">tk_Comma</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Print"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_Comma</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Print"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_RightParen</span><span style="color: #0000FF;">);</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Print"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_Semicolon</span><span style="color: #0000FF;">);</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Semicolon</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">:</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">v</span>
<span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">4</span><span style="color: #0000FF;">]}</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"assign"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_assign</span><span style="color: #0000FF;">);</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">expr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">);</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_assign</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">v</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">}</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"assign"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_Semicolon</span><span style="color: #0000FF;">);</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_while</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">paren_expr</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"while"</span><span style="color: #0000FF;">);</span>
<span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">();</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_while</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_LeftBrace</span><span style="color: #0000FF;">:</span> <span style="color: #000080;font-style:italic;">/* {stmt} */</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"LeftBrace"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_LeftBrace</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">],{</span><span style="color: #000000;">tk_RightBrace</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tk_EOI</span><span style="color: #0000FF;">})</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Sequence</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">()}</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #000000;">expect</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"LeftBrace"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tk_RightBrace</span><span style="color: #0000FF;">);</span>
<span style="color: #008080;">break</span><span style="color: #0000FF;">;</span>
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_EOI</span><span style="color: #0000FF;">:</span>
<span style="color: #008080;">break</span><span style="color: #0000FF;">;</span>
<span style="color: #008080;">default</span><span style="color: #0000FF;">:</span>
<span style="color: #000000;">errd</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"expecting start of statement, found '%s'\n"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">tkNames</span><span style="color: #0000FF;">[</span><span style="color: #000000;">tok</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]]);</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">switch</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">t</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">global</span> <span style="color: #008080;">function</span> <span style="color: #000000;">parse</span><span style="color: #0000FF;">()</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #004600;">NULL</span>
<span style="color: #000000;">tok</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">get_tok</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">stmt</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">=</span><span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">tk_Sequence</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">}</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">t</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
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