floraachy/Nasal-Interpreter
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This commit is contained in:
Valk Richard Li
2019-09-05 20:43:36 +08:00
committed by GitHub
parent 225b079fc7
commit 493b09acfe
2 changed files with 49 additions and 77 deletions
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version0.11/nasal_lexer.h
+36 -56
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@@ -11,14 +11,7 @@
#define NUMBER 3 // number
#define RESERVEWORD 4 // reserve word
#define STRING 5 // string
#define CHAR 6 // char
#define CALL_LIST 7 // id[
#define CALL_FUNC 8 // id(
#define FUNC_HEAD 9 // func(
#define DYNAMIC_ID 10 // id...
#define IF_HEAD 11 // if (
#define ELSIF_HEAD 12 // elsif (
#define WHILE_HEAD 13 // while (
#define DYNAMIC_ID 6 // id...
#define FAIL -1 //fail
#define SCANEND -2 //complete scanning
#define ERRORFOUND -3 //error occurred
@@ -176,33 +169,11 @@ class nasal_lexer
syn=IDENTIFIER;
else
syn=RESERVEWORD;
if((syn==IDENTIFIER) && ((source[ptr]=='(') || (source[ptr]=='[') || (source[ptr]=='.' && source[ptr+1]=='.' && source[ptr+2]=='.')))
if((syn==IDENTIFIER) && source[ptr]=='.' && source[ptr+1]=='.' && source[ptr+2]=='.')
{
__token+=source[ptr];
if(source[ptr]=='(')
syn=CALL_FUNC;
else if(source[ptr]=='[')
syn=CALL_LIST;
else if(source[ptr]=='.' && source[ptr+1]=='.' && source[ptr+2]=='.')
{
__token+="..";
syn=DYNAMIC_ID;
ptr+=2;
}
++ptr;
}
else if((syn==RESERVEWORD) && ((__token=="func") || (__token=="if") || (__token=="elsif") || (__token=="while")) && (source[ptr]=='('))
{
if(__token=="func")
syn=FUNC_HEAD;
else if(__token=="if")
syn=IF_HEAD;
else if(__token=="elsif")
syn=ELSIF_HEAD;
else if(__token=="while")
syn=WHILE_HEAD;
__token+=source[ptr];
++ptr;
__token+="...";
syn=DYNAMIC_ID;
ptr+=3;
}
}
else if(isNumber(temp))
@@ -263,17 +234,40 @@ class nasal_lexer
}
else if(temp=='\'')
{
syn=STRING;
__token+=temp;
++ptr;
temp=source[ptr];
__token+=temp;
++ptr;
temp=source[ptr];
__token+=temp;
++ptr;
if(temp!='\'')
std::cout<<">>[Lexer] Abnormal char type detected: "<<__token<<" ."<<std::endl;
syn=CHAR;
while(temp!='\'')
{
if(temp=='\\')
{
__token+=temp;
++ptr;
temp=source[ptr];
__token+=temp;
++ptr;
temp=source[ptr];
}
else
{
__token+=temp;
++ptr;
temp=source[ptr];
}
if(temp==0 || temp=='\n')
break;
}
//add the last char \"
if(temp=='\'')
{
__token+=temp;
++ptr;
}
else
__token+=" __missing_end_of_string";
}
else if(temp=='=' || temp=='+' || temp=='-' || temp=='*' || temp=='!' || temp=='/' || temp=='<' || temp=='>' || temp=='~')
{
@@ -396,22 +390,8 @@ class nasal_lexer
std::cout<<"( ReserveWord | ";
else if(temp.type==STRING)
std::cout<<"( String | ";
else if(temp.type==CHAR)
std::cout<<"( Char | ";
else if(temp.type==CALL_LIST)
std::cout<<"( Call list head | ";
else if(temp.type==CALL_FUNC)
std::cout<<"( Call func head | ";
else if(temp.type==FUNC_HEAD)
std::cout<<"( Func head | ";
else if(temp.type==DYNAMIC_ID)
std::cout<<"( Identifier | ";
else if(temp.type==IF_HEAD)
std::cout<<"( If head | ";
else if(temp.type==ELSIF_HEAD)
std::cout<<"( Elsif head | ";
else if(temp.type==WHILE_HEAD)
std::cout<<"( While head | ";
std::cout<<temp.content<<" )"<<std::endl;
}
return;