diff options
Diffstat (limited to 'Lexer.hh')
| -rw-r--r-- | Lexer.hh | 59 |
1 files changed, 59 insertions, 0 deletions
@@ -1,6 +1,8 @@ #ifndef PCC_LEXER_H #define PCC_LEXER_H +#include <map> + #include "Node.hh" #include "Parser.hh" @@ -10,6 +12,63 @@ YY_DECL; namespace pcc { namespace Lexer { +char* GetUnescapedChar(char* s, char* end, char* out) { + static std::map<char, char> escape_map = { + {'\'', '\''}, {'?', '\?'}, {'\\', '\\'}, {'a', '\a'}, {'b', '\b'}, + {'f', '\f'}, {'n', '\n'}, {'r', '\r'}, {'t', '\t'}, {'v', '\v'}}; + if (s[0] != '\\') { + *out = s[0]; + return s + 1; + } else if (s[1] == 'x') { + char c[3], *cend; + c[0] = s[2]; + if (end - s > 3) { + c[1] = s[3]; + c[2] = '\0'; + } else { + c[1] = '\0'; + } + *out = (char) std::strtol(c, &cend, 16); + return s + 2 + (cend - c); + } else if (s[1] >= '0' && s[1] <= '7') { + char c[4], *cend; + c[0] = s[1]; + if (end - s > 4) { + c[1] = s[2]; + c[2] = s[3]; + c[3] = '\0'; + } else if (end - s > 3) { + c[1] = s[2]; + c[2] = '\0'; + } else { + c[1] = '\0'; + } + *out = (char) std::strtol(c, &cend, 8); + return s + 1 + (cend - c); + } else { + *out = escape_map[s[1]]; + return s + 2; + } +} + +Parser::symbol_type make_BOOLEAN_LITERAL(bool b, pcc::Driver& driver, + const Parser::location_type& loc) { + return Parser::make_BOOLEAN_LITERAL( + std::make_shared<BooleanLiteralNode>(&driver, b), loc); +} + +Parser::symbol_type make_INTEGER_LITERAL(int v, pcc::Driver& driver, + const Parser::location_type& loc) { + return Parser::make_INTEGER_LITERAL( + std::make_shared<IntegerLiteralNode>(&driver, v), loc); +} + +Parser::symbol_type make_REAL_LITERAL(float v, pcc::Driver& driver, + const Parser::location_type& loc) { + return Parser::make_REAL_LITERAL( + std::make_shared<RealLiteralNode>(&driver, v), loc); +} + Parser::symbol_type make_STRING_LITERAL(char* s, pcc::Driver& driver, const Parser::location_type& loc) { return Parser::make_STRING_LITERAL( |