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Improved position reporting of script errors

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git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@931 0fc631ac-6414-0410-93d0-97cfa31319b6
This commit is contained in:
twanvl
2008-06-01 01:07:45 +00:00
parent 97ccf34dce
commit 5b47f6f498
5 changed files with 36 additions and 25 deletions
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src/script/parser.cpp
+20 -18
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@@ -41,6 +41,7 @@ struct Token {
TokenType type;
String value;
bool newline; ///< Is there a newline between this token and the previous one?
size_t pos; ///< Start position of the token
inline bool operator == (TokenType t) const { return type == t; }
inline bool operator != (TokenType t) const { return type != t; }
@@ -92,7 +93,7 @@ class TokenIterator {
stack<MoreInput> more; ///< Read tokens from here when we are done with the current input
/// Add a token to the buffer, with the current newline value, resets newline
void addToken(TokenType type, const String& value);
void addToken(TokenType type, const String& value, size_t start);
/// Read the next token, and add it to the buffer
void readToken();
/// Read the next token which is a string (after the opening ")
@@ -154,8 +155,8 @@ void TokenIterator::putBack() {
buffer.insert(buffer.begin(), t);
}
void TokenIterator::addToken(TokenType type, const String& value) {
Token t = {type, value, newline};
void TokenIterator::addToken(TokenType type, const String& value, size_t start) {
Token t = {type, value, newline, start};
buffer.push_back(t);
newline = false;
}
@@ -170,7 +171,7 @@ void TokenIterator::readToken() {
more.pop();
} else {
// EOF
addToken(TOK_EOF, _("end of input"));
addToken(TOK_EOF, _("end of input"), input.size());
}
return;
}
@@ -200,7 +201,7 @@ void TokenIterator::readToken() {
// name
size_t start = pos - 1;
while (pos < input.size() && isAlnum_(input.GetChar(pos))) ++pos;
addToken(TOK_NAME, cannocial_name_form(input.substr(start, pos-start))); // convert name to cannocial form
addToken(TOK_NAME, cannocial_name_form(input.substr(start, pos-start)), start); // convert name to cannocial form
} else if (isDigit(c)) {
// number
size_t start = pos - 1;
@@ -208,16 +209,16 @@ void TokenIterator::readToken() {
String num = input.substr(start, pos-start);
addToken(
num.find_first_of('.') == String::npos ? TOK_INT : TOK_DOUBLE,
num
num, start
);
} else if (isOper(c)) {
// operator
if (pos < input.size() && isLongOper(input.substr(pos - 1, 2))) {
// long operator
addToken(TOK_OPER, input.substr(pos - 1, 2));
addToken(TOK_OPER, input.substr(pos - 1, 2), pos-1);
pos += 1;
} else {
addToken(TOK_OPER, input.substr(pos - 1, 1));
addToken(TOK_OPER, input.substr(pos - 1, 1), pos-1);
}
} else if (c==_('"')) {
// string
@@ -226,16 +227,16 @@ void TokenIterator::readToken() {
} else if (c == _('}') && !open_braces.empty() && open_braces.top() != BRACE_PAREN) {
// closing smart string, resume to string parsing
// "a{e}b" --> "a" "{ e }" "b"
addToken(TOK_RPAREN, _("}\""));
addToken(TOK_RPAREN, _("}\""), pos-1);
readStringToken();
} else if (isLparen(c)) {
// paranthesis/brace
open_braces.push(BRACE_PAREN);
addToken(TOK_LPAREN, String(1,c));
addToken(TOK_LPAREN, String(1,c), pos-1);
} else if (isRparen(c)) {
// paranthesis/brace
if (!open_braces.empty()) open_braces.pop();
addToken(TOK_RPAREN, String(1,c));
addToken(TOK_RPAREN, String(1,c), pos-1);
} else if(c==_('#')) {
// comment untill end of line
while (pos < input.size() && input[pos] != _('\n')) ++pos;
@@ -246,17 +247,18 @@ void TokenIterator::readToken() {
}
void TokenIterator::readStringToken() {
size_t start = max((size_t)1, pos) - 1;
String str;
while (true) {
if (pos >= input.size()) {
if (!open_braces.empty() && open_braces.top() == BRACE_STRING_MODE) {
// in string mode: end of input = end of string
addToken(TOK_STRING, str);
addToken(TOK_STRING, str, start);
return;
} else {
add_error(_("Unexpected end of input in string constant"));
// fix up
addToken(TOK_STRING, str);
addToken(TOK_STRING, str, start);
return;
}
}
@@ -264,7 +266,7 @@ void TokenIterator::readStringToken() {
// parse the string constant
if (c == _('"') && !open_braces.empty() && open_braces.top() == BRACE_STRING) {
// end of string
addToken(TOK_STRING, str);
addToken(TOK_STRING, str, start);
open_braces.pop();
return;
} else if (c == _('\\')) {
@@ -272,7 +274,7 @@ void TokenIterator::readStringToken() {
if (pos >= input.size()) {
add_error(_("Unexpected end of input in string constant"));
// fix up
addToken(TOK_STRING, str);
addToken(TOK_STRING, str, start);
return;
}
c = input.GetChar(pos++);
@@ -282,8 +284,8 @@ void TokenIterator::readStringToken() {
} else if (c == _('{')) {
// smart string
// "a{e}b" --> "a" "{ e }" "b"
addToken(TOK_STRING, str);
addToken(TOK_LPAREN, _("\"{"));
addToken(TOK_STRING, str, start);
addToken(TOK_LPAREN, _("\"{"), pos-1);
return;
} else {
str += c;
@@ -302,7 +304,7 @@ void TokenIterator::add_error(const String& message) {
errors.push_back(ScriptParseError(pos, line, filename, message));
}
void TokenIterator::expected(const String& expected) {
size_t error_pos = pos - peek(0).value.size();
size_t error_pos = peek(0).pos;
if (!errors.empty() && errors.back().start == pos) return; // already an error here
// find line number
int line = 1;