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This commit is contained in:
Valk Richard Li
2020-10-27 19:54:47 +08:00
parent b612f73ff7
commit 2923d24e6c
4 changed files with 166 additions and 454 deletions
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test/lexer.nas
+40 -25
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@@ -1,22 +1,10 @@
import("lib.nas");
var s=io.fin("lexer.nas");
var s=io.fin("a.nas");
s=split('',s);
var len=size(s);
var ptr=0;
var cmp=func(s1,s2)
{
var size1=size(s1);
var size2=size(s2);
if(size1!=size2)
return size1<size2;
for(var i=0;i<size1;i+=1)
if(s1[i]>s2[i])
return 0;
return 1;
}
var jump_note=func()
{
while(ptr<len and s[ptr]!='\n')
@@ -30,10 +18,10 @@ var generate_id=func()
var tmp="";
while(ptr<len)
{
if('a'[0]<=s[ptr][0] and s[ptr][0]<='z'[0]
or 'A'[0]<=s[ptr][0] and s[ptr][0]<='Z'[0]
if('a'<=s[ptr] and s[ptr]<='z'
or 'A'<=s[ptr] and s[ptr]<='Z'
or s[ptr]=='_'
or '0'[0]<=s[ptr][0] and s[ptr][0]<='9'[0])
or '0'<=s[ptr] and s[ptr]<='9')
tmp~=s[ptr];
else
break;
@@ -86,7 +74,7 @@ var generate_number=func()
if(s[ptr]=='x')
{
ptr+=1;
while(ptr<len and ('a'[0]<=s[ptr][0] and s[ptr][0]<='f'[0] or '0'[0]<=s[ptr][0] and s[ptr][0]<='9'[0]))
while(ptr<len and ('a'<=s[ptr] and s[ptr]<='f' or '0'<=s[ptr] and s[ptr]<='9'))
{
number~=s[ptr];
ptr+=1;
@@ -96,7 +84,7 @@ var generate_number=func()
elsif(s[ptr]=='o')
{
ptr+=1;
while(ptr<len and ('0'[0]<=s[ptr][0] and s[ptr][0]<='7'[0]))
while(ptr<len and ('0'<=s[ptr] and s[ptr]<='7'))
{
number~=s[ptr];
ptr+=1;
@@ -104,7 +92,7 @@ var generate_number=func()
return num(number);
}
while(ptr<len and ('0'[0]<=s[ptr][0] and s[ptr][0]<='9'[0]))
while(ptr<len and ('0'<=s[ptr] and s[ptr]<='9'))
{
number~=s[ptr];
ptr+=1;
@@ -113,6 +101,27 @@ var generate_number=func()
number~=s[ptr];
else
return num(number);
ptr+=1;
while(ptr<len and ('0'<=s[ptr] and s[ptr]<='9'))
{
number~=s[ptr];
ptr+=1;
}
if(s[ptr]=='e' or s[ptr]=='E')
number~=s[ptr];
else
return num(number);
ptr+=1;
if(s[ptr]=='-' or s[ptr]=='+')
{
number~=s[ptr];
ptr+=1;
}
while(ptr<len and ('0'<=s[ptr] and s[ptr]<='9'))
{
number~=s[ptr];
ptr+=1;
}
return num(number);
}
@@ -150,22 +159,28 @@ var generate_operator=func()
return tmp;
}
var cnt=0;
var token=[];
while(ptr<len)
{
if(s[ptr]=='#')
jump_note();
elsif('a'[0]<=s[ptr][0] and s[ptr][0]<='z'[0] or 'A'[0]<=s[ptr][0] and s[ptr][0]<='Z'[0] or s[ptr]=='_')
print("(",cnt+=1," | ",generate_id(),")");
elsif('a'<=s[ptr] and s[ptr]<='z' or 'A'<=s[ptr] and s[ptr]<='Z' or s[ptr]=='_')
append(token,generate_id());
elsif(s[ptr]=='\'' or s[ptr]=='\"')
print("(",cnt+=1," | \"",generate_str(),"\")");
elsif('0'[0]<=s[ptr][0] and s[ptr][0]<='9'[0])
print("(",cnt+=1," | ",generate_number(),")");
append(token,generate_str());
elsif('0'<=s[ptr] and s[ptr]<='9')
append(token,generate_number());
else
{
var tmp=generate_operator();
if(size(tmp))
print("(",cnt+=1," | ",tmp,")");
append(token,tmp);
}
if(ptr>=len)
break;
}
foreach(var i;token)
{
print("(",cnt," | ",i,")");
cnt+=1;
}