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Nasal-Interpreter
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Finished all recognitions

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Valk Richard Li 2019-08-21 00:19:03 +08:00 committed by GitHub
parent d333b706ca
commit 5b7aa5e26f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 68 additions and 1 deletions
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69
version0.4/nasal_parse.h
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@ -45,6 +45,7 @@ class parse
bool identifiers_reduction();
bool hashmember_check();
bool hashmembers_reduction();
bool function_def();
bool statement_check();
bool statements_reduction();
bool definition_check();
@ -431,6 +432,67 @@ bool parse::assignment_check()
}
return false;
}
bool parse::function_def()
{
int tbl[10]={0};
std::stack<parse_unit> temp;
for(int i=0;i<10;++i)
{
if(parser.empty())
break;
temp.push(parser.top());
tbl[i]=temp.top().type;
parser.pop();
}
for(int i=0;i<10;++i)
{
if(temp.empty())
break;
parser.push(temp.top());
temp.pop();
}
if((tbl[7]==__var) && (tbl[6]==__identifier) && (tbl[5]==__equal) && (tbl[4]==__func) && (tbl[3]==__left_curve) && (tbl[2]==__right_curve) && (tbl[1]==__left_brace) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__function;
t.line=parser.top().line;
for(int i=0;i<8;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[8]==__var) && (tbl[7]==__identifier) && (tbl[6]==__equal) && (tbl[5]==__func) && (tbl[4]==__left_curve) && ((tbl[3]==__identifier) || (tbl[3]==__identifiers)) && (tbl[2]==__right_curve) && (tbl[1]==__left_brace) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__function;
t.line=parser.top().line;
for(int i=0;i<9;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[8]==__var) && (tbl[7]==__identifier) && (tbl[6]==__equal) && (tbl[5]==__func) && (tbl[4]==__left_curve) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__function;
t.line=parser.top().line;
for(int i=0;i<9;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[9]==__var) && (tbl[8]==__identifier) && (tbl[7]==__equal) && (tbl[6]==__func) && (tbl[5]==__left_curve) && ((tbl[4]==__identifier) || (tbl[4]==__identifiers)) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__function;
t.line=parser.top().line;
for(int i=0;i<10;++i)
parser.pop();
parser.push(t);
return true;
}
return false;
}
bool parse::statement_check()
{
int tbl[3]={0};
@ -450,7 +512,7 @@ bool parse::statement_check()
parser.push(temp.top());
temp.pop();
}
if((tbl[0]==__definition) || (tbl[0]==__assignment) || (tbl[0]==__func) || (tbl[0]==__loop) || (tbl[0]==__choose))
if((tbl[0]==__definition) || (tbl[0]==__assignment) || (tbl[0]==__function) || (tbl[0]==__loop) || (tbl[0]==__choose))
{
parse_unit t;
t.type=__statement;
@ -658,6 +720,11 @@ void parse::parse_work(token_list& lexer)
std::cout<<"line "<<parser.top().line<<": Assignment"<<std::endl;
continue;
}
if(function_def())
{
std::cout<<"line "<<parser.top().line<<": Definition for func()"<<std::endl;
continue;
}
if(statement_check())
{
std::cout<<"line "<<parser.top().line<<": Statement"<<std::endl;