↓ 11 callersFunctionisNumericThis functions recognizes only numbers with digits, plus sign, minus sign, decimal point, e, or E. Hexadecimal and pointers not currently supported.
src/utils/general/ParseTools.cpp:12
↓ 8 callersFunctionbcf_hdr_get_hrec* Note that while querying of FLT,INFO,FMT,CTG lines is fast (the keys are hashed),
* the STR,GEN lines are searched for linearly in a linked list
src/utils/htslib/vcf.c:585