Custom Language Compiler

I need a program to read the language from a file and tell if the syntax is correct but also show if there is an error and specify it with line:column and what's wrong. Language Specification: Data Types: pint = integer pchar = char pfloat = float pdouble = double if statements with the name of "pif" for and while loops with the names "pfor and pwhile" printf and scanf methods arithmetic validations all opening/closing tokens must be a lowercase "p" all variable names must start with a uppercase "P" there is no need to generate an executable, only the lexer/parser with error handling and correction suggestion code example: pint number = 10; pif p number < 20 p p printf p "20 is bigger than " + number p; p the code above is a valid example, if it was missing a semicolon for example it would have to show there was an error in line X and Column X and it was expecting a semicolon but found X You can use flex, bison, antlr or whatever lib or language you prefer.