Parse exponential expressions only when decimal is present

heoh · heoh · commit b48f81b5bc06 · 2025-10-24T18:50:32.000Z
diff --git a/pandas/_libs/src/parser/tokenizer.c b/pandas/_libs/src/parser/tokenizer.c
@@ -1831,7 +1831,7 @@ static int _str_copy_decimal_str_c(char *dst, size_t dst_sz, const char *src,
   }
 
   // Copy exponent if any
-  if ((ret = str_consume_nspan(&d, de - d, &s, 1, exponents)) > 0) {
+  if (decimal && (ret = str_consume_nspan(&d, de - d, &s, 1, exponents)) > 0) {
     SAFE_CONSUME_NSPAN(d, de, s, 1, signs);
     SAFE_CONSUME_SPAN(d, de, s, digits);
   } else if (ret < 0) {

Original file line number	Diff line number	Diff line change
`@@ -1831,7 +1831,7 @@ static int _str_copy_decimal_str_c(char dst, size_t dst_sz, const char src,`
`1831`	`1831`	`}`
`1832`	`1832`
`1833`	`1833`	`// Copy exponent if any`
`1834`		`- if ((ret = str_consume_nspan(&d, de - d, &s, 1, exponents)) > 0) {`
	`1834`	`+ if (decimal && (ret = str_consume_nspan(&d, de - d, &s, 1, exponents)) > 0) {`
`1835`	`1835`	`SAFE_CONSUME_NSPAN(d, de, s, 1, signs);`
`1836`	`1836`	`SAFE_CONSUME_SPAN(d, de, s, digits);`
`1837`	`1837`	`} else if (ret < 0) {`