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add syntax checking with issue highlighting

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hasslesstech
2026-10-06 21:02:40 +03:00
parent 0b97baca48
commit 65eb6cf0b1
5 changed files with 231 additions and 15 deletions
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src/syntaxer.cpp
+208 -6
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@@ -1,18 +1,215 @@
#include "syntaxer.hpp"
#include "parser.hpp"
#include "expression.hpp"
#include <vector>
#include "parser.hpp"
#include "print.h"
#include "syntaxer.hpp"
#include <stack>
#include <vector>
namespace Syntax {
#if 0
std::vector<SyntaxIssue> check_syntax(std::vector<Expression::Token>& tv);
static void highlight_issue(const std::vector<Expression::Token>& tv, const int location)
{
int start = location - 7 < 0 ? 0 : location - 7;
int finish = location + 7 > tv.size() - 1 ? tv.size() - 1 : location + 7;
std::cout << " >>> ";
for (int i = start; i <= finish; i++)
{
if (i == location)
{
std::cout << "\033[31m" << *tv[i].to_math_str() << "\033[0m ";
}
else
{
std::cout << *tv[i].to_math_str() << " ";
}
}
std::cout << "\n";
}
#endif
int check_syntax(std::vector<Expression::Token>& tv)
{
int problem_cnt = 0;
// check token type sequence
{
for (int i = 0, l = tv.size() - 1, pc; pc = problem_cnt, i < l; i++)
{
switch (tv[i].t)
{
case Expression::Token::VAR:
case Expression::Token::CONST:
switch (tv[i+1].t)
{
case Expression::Token::OPERATOR:
switch (tv[i+1].v.o)
{
case Expression::Token::OPA:
pr_warn("Expected operator at token " << i << ", got opening bracket");
problem_cnt++;
break;
case Expression::Token::CPA:
break;
default:
break;
}
break;
case Expression::Token::VAR:
pr_warn("Expected operator at token " << i << ", got variable");
problem_cnt++;
break;
case Expression::Token::CONST:
pr_warn("Expected operator at token " << i << ", got constant");
problem_cnt++;
break;
default:
pr_warn("Impossible token type, this is a bug!");
break;
}
break;
case Expression::Token::OPERATOR:
switch (tv[i].v.o)
{
case Expression::Token::OPA:
switch (tv[i+1].t)
{
case Expression::Token::OPERATOR:
switch (tv[i+1].v.o)
{
case Expression::Token::OPA:
break;
case Expression::Token::CPA:
pr_warn("Expected value at token " << i << ", got closing bracket");
problem_cnt++;
break;
default:
pr_warn("Expected value at token " << i << ", got operator");
problem_cnt++;
break;
}
break;
case Expression::Token::CONST:
case Expression::Token::VAR:
break;
default:
pr_warn("Impossible token type, this is a bug!");
break;
}
break;
case Expression::Token::CPA:
switch (tv[i+1].t)
{
case Expression::Token::OPERATOR:
switch (tv[i+1].v.o)
{
case Expression::Token::CPA:
break;
case Expression::Token::OPA:
pr_warn("Expected operator at token " << i << ", got opening bracket");
problem_cnt++;
break;
default:
break;
}
break;
case Expression::Token::CONST:
pr_warn("Expected operator at token " << i << ", got constant");
problem_cnt++;
break;
case Expression::Token::VAR:
pr_warn("Expected operator at token " << i << ", got variable");
problem_cnt++;
break;
default:
pr_warn("Impossible token type, this is a bug!");
break;
}
break;
default:
switch (tv[i+1].t)
{
case Expression::Token::OPERATOR:
switch (tv[i+1].v.o)
{
case Expression::Token::CPA:
pr_warn("Expected value at token " << i << ", got closing bracket");
problem_cnt++;
break;
case Expression::Token::OPA:
break;
default:
pr_warn("Expected value at token " << i << ", got operator");
problem_cnt++;
break;
}
break;
case Expression::Token::CONST:
break;
case Expression::Token::VAR:
break;
default:
pr_warn("Impossible token type, this is a bug!");
break;
}
break;
}
break;
default:
pr_warn("Impossible token type, this is a bug!");
break;
}
if (pc != problem_cnt)
{
highlight_issue(tv, i + 1);
}
}
}
// check bracket matching
{
std::stack<int> s;
for (int i = 0, l = tv.size(); i < l; i++)
{
if (tv[i].t == Expression::Token::OPERATOR)
{
switch (tv[i].v.o)
{
case Expression::Token::OPA:
s.push(i);
break;
case Expression::Token::CPA:
if (s.size())
{
s.pop();
}
else
{
pr_warn("Missing opening bracket at token " << i);
problem_cnt++;
highlight_issue(tv, i);
}
break;
default:
break;
}
}
}
for (int i = 0, l = s.size(); i < l; i++)
{
problem_cnt++;
pr_warn("Opening bracket at token " << s.top() << " expected a closing bracket, but none found");
highlight_issue(tv, s.top());
s.pop();
}
}
return problem_cnt;
}
// get mop = Math OPerator location (=absolute index in std::vector<Expression::Token>)
// mapper of 'priority vector index' -> 'token vector index'
@@ -377,6 +574,11 @@ void apply_corrections(std::vector<Expression::Token>& tv)
std::vector<int> mp;
create_prios_vector(tv, mp);
if (mp.size() == 0)
{
return;
}
for (int current_prio_level = mp[get_max_index(mp)]; current_prio_level >= 0; current_prio_level--)
{
// calculate how many ranges need to be processed at this level