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Compiler/AST interpreter (view source)

Revision as of 13:31, 6 January 2022

17,736 bytes added ,  2 years ago
m
→‎{{header|Phix}}: added syntax colouring, marked p2js compatible
m (Update Zig to 0.9.0)
m (→‎{{header|Phix}}: added syntax colouring, marked p2js compatible)
Line 2,402:
=={{header|Phix}}==
Reusing parse.e from the [[Compiler/syntax_analyzer#Phix|Syntax Analyzer task]]
<!--<lang Phix>(phixonline)-->
<span style="color: #000080;font-style:italic;">--
-- demo\rosetta\Compiler\interp.exw
-- demo\rosetta\Compiler\interp.exw
-- ================================
-- ================================
 
--</span>
include parse.e
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 
<span style="color: #008080;">include</span> <span style="color: #000000;">parse</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
sequence vars = {},
vals = {}
<span style="color: #004080;">sequence</span> <span style="color: #000000;">vars</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{},</span>
 
<span style="color: #000000;">vals</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
function var_idx(sequence inode)
if inode[1]!=tk_Identifier then ?9/0 end if
<span style="color: #008080;">function</span> <span style="color: #000000;">var_idx</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">inode</span><span style="color: #0000FF;">)</span>
string ident = inode[2]
<span style="color: #008080;">if</span> <span style="color: #000000;">inode</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]!=</span><span style="color: #000000;">tk_Identifier</span> <span style="color: #008080;">then</span> <span style="color: #0000FF;">?</span><span style="color: #000000;">9</span><span style="color: #0000FF;">/</span><span style="color: #000000;">0</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
integer n = find(ident,vars)
<span style="color: #004080;">string</span> <span style="color: #000000;">ident</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">inode</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">]</span>
if n=0 then
<span style="color: #004080;">integer</span> <span style="color: #000000;">n</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ident</span><span style="color: #0000FF;">,</span><span style="color: #000000;">vars</span><span style="color: #0000FF;">)</span>
vars = append(vars,ident)
<span style="color: #008080;">if</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
vals = append(vals,0)
<span style="color: #000000;">vars</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vars</span><span style="color: #0000FF;">,</span><span style="color: #000000;">ident</span><span style="color: #0000FF;">)</span>
n = length(vars)
<span style="color: #000000;">vals</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vals</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #000000;">n</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">vars</span><span style="color: #0000FF;">)</span>
return n
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #008080;">return</span> <span style="color: #000000;">n</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function interp(object t)
if t!=NULL then
<span style="color: #008080;">function</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
integer ntype = t[1]
<span style="color: #008080;">if</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">!=</span><span style="color: #004600;">NULL</span> <span style="color: #008080;">then</span>
object t2 = t[2],
<span style="color: #004080;">integer</span> <span style="color: #000000;">ntype</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
t3 = iff(length(t)=3?t[3]:0)
<span style="color: #004080;">object</span> <span style="color: #000000;">t2</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">],</span>
switch ntype do
<span style="color: #000000;">t3</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">3</span><span style="color: #0000FF;">?</span><span style="color: #000000;">t</span><span style="color: #0000FF;">[</span><span style="color: #000000;">3</span><span style="color: #0000FF;">]:</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
case tk_Sequence: {} = interp(t2) {} = interp(t3)
<span style="color: #008080;">switch</span> <span style="color: #000000;">ntype</span> <span style="color: #008080;">do</span>
case tk_assign: vals[var_idx(t2)] = interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Sequence</span><span style="color: #0000FF;">:</span> <span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_Identifier: return vals[var_idx(t)]
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_assign</span><span style="color: #0000FF;">:</span> <span style="color: #000000;">vals</span><span style="color: #0000FF;">[</span><span style="color: #000000;">var_idx</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_Integer: return t2
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Identifier</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">vals</span><span style="color: #0000FF;">[</span><span style="color: #000000;">var_idx</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)]</span>
case tk_String: return t2
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Integer</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">t2</span>
case tk_lt: return interp(t2) < interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_String</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">t2</span>
case tk_add: return interp(t2) + interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_lt</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;"><</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_sub: return interp(t2) - interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_add</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">+</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_while: while interp(t2) do {} = interp(t3) end while
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_sub</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_Prints: puts(1,interp(t2))
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_while</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">while</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> <span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
case tk_Printi: printf(1,"%d",interp(t2))
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Prints</span><span style="color: #0000FF;">:</span> <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">))</span>
case tk_putc: printf(1,"%c",interp(t2))
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_Printi</span><span style="color: #0000FF;">:</span> <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">))</span>
case tk_and: return interp(t2) and interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_putc</span><span style="color: #0000FF;">:</span> <span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%c"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">))</span>
case tk_or: return interp(t2) or interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_and</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">and</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_le: return interp(t2) <= interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_or</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">or</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_ge: return interp(t2) >= interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_le</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;"><=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_ne: return interp(t2) != interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_ge</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">>=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_gt: return interp(t2) > interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_ne</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">!=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_mul: return interp(t2) * interp(t3)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_gt</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">></span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_div: return trunc(interp(t2)/interp(t3))
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_mul</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span> <span style="color: #0000FF;">*</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">)</span>
case tk_mod: return remainder(interp(t2),interp(t3))
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_div</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #7060A8;">trunc</span><span style="color: #0000FF;">(</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)/</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">))</span>
case tk_if: {} = interp(t3[iff(interp(t2)?2:3)])
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_mod</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">),</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">))</span>
case tk_not: return not interp(t2)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_if</span><span style="color: #0000FF;">:</span> <span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t3</span><span style="color: #0000FF;">[</span><span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)?</span><span style="color: #000000;">2</span><span style="color: #0000FF;">:</span><span style="color: #000000;">3</span><span style="color: #0000FF;">)])</span>
case tk_neg: return - interp(t2)
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_not</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #008080;">not</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span>
else
<span style="color: #008080;">case</span> <span style="color: #000000;">tk_neg</span><span style="color: #0000FF;">:</span> <span style="color: #008080;">return</span> <span style="color: #0000FF;">-</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t2</span><span style="color: #0000FF;">)</span>
error("unknown node type")
<span style="color: #008080;">else</span>
end switch
<span style="color: #000000;">error</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"unknown node type"</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">switch</span>
return NULL
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end function
<span style="color: #008080;">return</span> <span style="color: #004600;">NULL</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
procedure main(sequence cl)
open_files(cl)
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">cl</span><span style="color: #0000FF;">)</span>
toks = lex()
<span style="color: #000000;">open_files</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cl</span><span style="color: #0000FF;">)</span>
object t = parse()
<span style="color: #000000;">toks</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">lex</span><span style="color: #0000FF;">()</span>
{} = interp(t)
<span style="color: #004080;">object</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">parse</span><span style="color: #0000FF;">()</span>
close_files()
<span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">interp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span>
end procedure
<span style="color: #000000;">close_files</span><span style="color: #0000FF;">()</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
--main(command_line())
main({0,0,"primes.c"})</lang>
<span style="color: #000080;font-style:italic;">--main(command_line())</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">({</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"primes.c"</span><span style="color: #0000FF;">})</span>
<!--</lang>-->
{{out}}
<pre>
Petelomax
7,806

edits

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