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Added Hexadecimal encoding and binary encoding to numbers using '0x' and '0b'
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parent
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commit
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31
src/clex.c
31
src/clex.c
@ -245,11 +245,38 @@ CToken parseString(CLexState *state) {
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return makeToken(state, TOKEN_STRING);
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}
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bool isHex(char c) {
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return isNumerical(c) || ('A' <= c && 'F' >= c) || ('a' <= c && 'f' >= c);
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}
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CToken parseNumber(CLexState *state) {
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// consume number
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while (isNumerical(peek(state)))
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switch (peek(state)) {
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case 'x': // hexadecimal number
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next(state);
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while (isHex(peek(state)))
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next(state);
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return makeToken(state, TOKEN_HEXNUMBER);
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case 'b': // binary number
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next(state);
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while (peek(state) == '0' || peek(state) == '1')
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next(state);
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return makeToken(state, TOKEN_BINNUMBER);
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default:
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if (!isNumerical(peek(state)))
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return makeError(state, "Unrecognized number encoding!");
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// if it is a number, fall through and parse normally
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}
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// consume number
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while (isNumerical(peek(state))) {
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next(state);
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}
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if (peek(state) == '.' && isNumerical(peekNext(state))) {
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next(state); // consume '.'
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@ -40,6 +40,8 @@ typedef enum {
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TOKEN_IDENTIFIER,
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TOKEN_STRING, // token.start is heap allocated and separate from the source string!
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TOKEN_NUMBER,
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TOKEN_HEXNUMBER,
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TOKEN_BINNUMBER,
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TOKEN_NIL,
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TOKEN_TRUE,
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TOKEN_FALSE,
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12
src/cparse.c
12
src/cparse.c
@ -407,6 +407,16 @@ static void number(CParseState *pstate, bool canAssign, Precedence prec) {
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writeConstant(pstate, cosmoV_newNumber(num));
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}
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static void hexnumber(CParseState *pstate, bool canAssign, Precedence prec) {
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cosmo_Number num = strtol(pstate->previous.start + 2, NULL, 16); // +2 to skip the '0x'
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writeConstant(pstate, cosmoV_newNumber(num));
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}
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static void binnumber(CParseState *pstate, bool canAssign, Precedence prec) {
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cosmo_Number num = strtol(pstate->previous.start + 2, NULL, 2); // +2 to skip the '0b'
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writeConstant(pstate, cosmoV_newNumber(num));
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}
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static void string(CParseState *pstate, bool canAssign, Precedence prec) {
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CObjString *strObj = cosmoO_takeString(pstate->state, pstate->previous.start, pstate->previous.length);
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writeConstant(pstate, cosmoV_newObj((CObj*)strObj));
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@ -922,6 +932,8 @@ ParseRule ruleTable[] = {
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[TOKEN_IDENTIFIER] = {variable, NULL, PREC_NONE},
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[TOKEN_STRING] = {string, NULL, PREC_NONE},
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[TOKEN_NUMBER] = {number, NULL, PREC_NONE},
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[TOKEN_HEXNUMBER] = {hexnumber, NULL, PREC_NONE},
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[TOKEN_BINNUMBER] = {binnumber, NULL, PREC_NONE},
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[TOKEN_NIL] = {literal, NULL, PREC_NONE},
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[TOKEN_TRUE] = {literal, NULL, PREC_NONE},
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[TOKEN_FALSE] = {literal, NULL, PREC_NONE},
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