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scientific notation lexing

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Timerix22 2023-12-25 21:11:13 +06:00
parent 2a4f92fe35
commit e30cfc6cf4
1 changed files with 10 additions and 1 deletions
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11
src/Lexer.fu
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@ -48,10 +48,19 @@ class Lexer {
case '/': AddStaticToken(TokDiv); break; case '/': AddStaticToken(TokDiv); break;
case '+': AddStaticToken(TokAdd); break; case '+': AddStaticToken(TokAdd); break;
case '-': case '-':
if(i != 0 && ExprStr[i-1] != '(') // if '-' is not the first char and previous char isn't '(' or 'e' or 'E'
if(i != 0 && ExprStr[i-1] != '('
&& ExprStr[i-1] != 'e' && ExprStr[i-1] != 'E')
AddStaticToken(TokSub); AddStaticToken(TokSub);
// else '-' is a part of numeric expression // else '-' is a part of numeric expression
break; break;
case 'e':
case 'E':
// if token starts with 'E' it is a literal
if(i == tokBegin)
tokType = Token.Type_Literal;
// else 'E' is a part of literal or number (sientific notation)
break;
// try end token and skip current char // try end token and skip current char
case ' ': case '\t': case '\n': case '\r': case ' ': case '\t': case '\n': case '\r':
TryEndToken(); TryEndToken();