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dchar[], not dstring in Reader/Scanner. Will be changed back where possible.

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This commit is contained in:
Ferdinand Majerech 2014-07-24 03:06:24 +02:00
parent 7ae6098bd9
commit 02494914e4
2 changed files with 49 additions and 44 deletions
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18
source/dyaml/reader.d
View file

@ -157,7 +157,7 @@ final class Reader
/// buffer; in that case the returned slice will be shorter. /// buffer; in that case the returned slice will be shorter.
/// ///
/// Returns: Characters starting at current position or an empty slice if out of bounds. /// Returns: Characters starting at current position or an empty slice if out of bounds.
dstring prefix(size_t length) @safe pure nothrow const @nogc dchar[] prefix(size_t length) @safe pure nothrow @nogc
{ {
return slice(0, length); return slice(0, length);
} }
@ -173,12 +173,13 @@ final class Reader
/// slice will be shorter. /// slice will be shorter.
/// ///
/// Returns: Slice into the internal buffer or an empty slice if out of bounds. /// Returns: Slice into the internal buffer or an empty slice if out of bounds.
dstring slice(size_t start, size_t end) @trusted pure nothrow const @nogc dchar[] slice(size_t start, size_t end) @trusted pure nothrow @nogc
{ {
start += bufferOffset_; start += bufferOffset_;
end = min(buffer_.length, end + bufferOffset_); end = min(buffer_.length, end + bufferOffset_);
assert(end >= start, "Trying to read a slice that starts after its end");
return end > start ? cast(dstring)buffer_[start .. end] : ""; return buffer_[start .. end];
} }
/// Get the next character, moving buffer position beyond it. /// Get the next character, moving buffer position beyond it.
@ -199,7 +200,7 @@ final class Reader
/// Params: length = Number or characters to get. /// Params: length = Number or characters to get.
/// ///
/// Returns: Characters starting at current position. /// Returns: Characters starting at current position.
dstring get(size_t length) @safe pure nothrow @nogc dchar[] get(size_t length) @safe pure nothrow @nogc
{ {
auto result = prefix(length); auto result = prefix(length);
forward(length); forward(length);
@ -315,14 +316,17 @@ public:
/// ///
/// Any Transactions on the slice must be committed or destroyed before the slice /// Any Transactions on the slice must be committed or destroyed before the slice
/// is finished. /// is finished.
///
/// Returns a string; once a slice is finished it is definitive that its contents
/// will not be changed.
dstring finish() @system pure nothrow @nogc dstring finish() @system pure nothrow @nogc
{ {
assert(inProgress, "sliceFinish called without sliceBegin"); assert(inProgress, "sliceFinish called without sliceBegin");
assert(endStackUsed_ == 0, "Finishing a slice with running transactions."); assert(endStackUsed_ == 0, "Finishing a slice with running transactions.");
const result = cast(dstring)reader_.buffer_[start_ .. end_]; const result = reader_.buffer_[start_ .. end_];
start_ = end_ = size_t.max; start_ = end_ = size_t.max;
return result; return cast(dstring)result;
} }
/// Write a string to the slice being built. /// Write a string to the slice being built.
@ -333,7 +337,7 @@ public:
/// end of the slice being built, the slice is extended (trivial operation). /// end of the slice being built, the slice is extended (trivial operation).
/// ///
/// See_Also: begin /// See_Also: begin
void write(dstring str) @system pure nothrow @nogc void write(dchar[] str) @system pure nothrow @nogc
{ {
assert(inProgress, "sliceWrite called without sliceBegin"); assert(inProgress, "sliceWrite called without sliceBegin");

73
source/dyaml/scanner.d
View file

@ -21,6 +21,7 @@ import std.ascii : isAlphaNum, isDigit, isHexDigit;
import std.exception; import std.exception;
import std.string; import std.string;
import std.typecons; import std.typecons;
import std.traits : Unqual;
import std.utf; import std.utf;
import dyaml.fastcharsearch; import dyaml.fastcharsearch;
@ -800,7 +801,7 @@ final class Scanner
} }
/// Scan a string of alphanumeric or "-_" characters. /// Scan a string of alphanumeric or "-_" characters.
dstring scanAlphaNumeric(string name)(const Mark startMark) @safe pure dchar[] scanAlphaNumeric(string name)(const Mark startMark) @safe pure
{ {
uint length = 0; uint length = 0;
dchar c = reader_.peek(); dchar c = reader_.peek();
@ -819,7 +820,7 @@ final class Scanner
} }
/// Scan all characters until next line break. /// Scan all characters until next line break.
dstring scanToNextBreak() @safe pure nothrow @nogc dchar[] scanToNextBreak() @safe pure nothrow @nogc
{ {
uint length = 0; uint length = 0;
while(!"\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(length))) while(!"\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek(length)))
@ -873,8 +874,8 @@ final class Scanner
//Skip the '%'. //Skip the '%'.
reader_.forward(); reader_.forward();
const name = scanDirectiveName(startMark); auto name = scanDirectiveName(startMark);
const value = name == "YAML" ? scanYAMLDirectiveValue(startMark): auto value = name == "YAML" ? scanYAMLDirectiveValue(startMark):
name == "TAG" ? scanTagDirectiveValue(startMark) : ""; name == "TAG" ? scanTagDirectiveValue(startMark) : "";
Mark endMark = reader_.mark; Mark endMark = reader_.mark;
@ -887,10 +888,10 @@ final class Scanner
} }
///Scan name of a directive token. ///Scan name of a directive token.
dstring scanDirectiveName(const Mark startMark) @trusted dchar[] scanDirectiveName(const Mark startMark) @trusted
{ {
//Scan directive name. //Scan directive name.
const name = scanAlphaNumeric!"a directive"(startMark); auto name = scanAlphaNumeric!"a directive"(startMark);
enforce(" \0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()), enforce(" \0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()),
new Error("While scanning a directive", startMark, new Error("While scanning a directive", startMark,
@ -900,11 +901,11 @@ final class Scanner
} }
///Scan value of a YAML directive token. Returns major, minor version separated by '.'. ///Scan value of a YAML directive token. Returns major, minor version separated by '.'.
dstring scanYAMLDirectiveValue(const Mark startMark) @trusted dchar[] scanYAMLDirectiveValue(const Mark startMark) @trusted
{ {
findNextNonSpace(); findNextNonSpace();
dstring result = scanYAMLDirectiveNumber(startMark); dchar[] result = scanYAMLDirectiveNumber(startMark);
enforce(reader_.peek() == '.', enforce(reader_.peek() == '.',
new Error("While scanning a directive", startMark, new Error("While scanning a directive", startMark,
"expected a digit or '.', but found: " "expected a digit or '.', but found: "
@ -921,7 +922,7 @@ final class Scanner
} }
/// Scan a number from a YAML directive. /// Scan a number from a YAML directive.
dstring scanYAMLDirectiveNumber(const Mark startMark) @safe pure dchar[] scanYAMLDirectiveNumber(const Mark startMark) @safe pure
{ {
enforce(isDigit(reader_.peek()), enforce(isDigit(reader_.peek()),
new Error("While scanning a directive", startMark, new Error("While scanning a directive", startMark,
@ -936,7 +937,7 @@ final class Scanner
} }
///Scan value of a tag directive. ///Scan value of a tag directive.
dstring scanTagDirectiveValue(const Mark startMark) @safe dchar[] scanTagDirectiveValue(const Mark startMark) @safe
{ {
findNextNonSpace(); findNextNonSpace();
const handle = scanTagDirectiveHandle(startMark); const handle = scanTagDirectiveHandle(startMark);
@ -945,9 +946,9 @@ final class Scanner
} }
///Scan handle of a tag directive. ///Scan handle of a tag directive.
dstring scanTagDirectiveHandle(const Mark startMark) @trusted dchar[] scanTagDirectiveHandle(const Mark startMark) @trusted
{ {
const value = scanTagHandle("directive", startMark); auto value = scanTagHandle("directive", startMark);
enforce(reader_.peek() == ' ', enforce(reader_.peek() == ' ',
new Error("While scanning a directive handle", startMark, new Error("While scanning a directive handle", startMark,
"expected ' ', but found: " ~ to!string(reader_.peek()), "expected ' ', but found: " ~ to!string(reader_.peek()),
@ -956,9 +957,9 @@ final class Scanner
} }
///Scan prefix of a tag directive. ///Scan prefix of a tag directive.
dstring scanTagDirectivePrefix(const Mark startMark) @trusted dchar[] scanTagDirectivePrefix(const Mark startMark) @trusted
{ {
const value = scanTagURI("directive", startMark); auto value = scanTagURI("directive", startMark);
enforce(" \0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()), enforce(" \0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()),
new Error("While scanning a directive prefix", startMark, new Error("While scanning a directive prefix", startMark,
"expected ' ', but found" ~ to!string(reader_.peek()), "expected ' ', but found" ~ to!string(reader_.peek()),
@ -998,7 +999,7 @@ final class Scanner
const dchar i = reader_.get(); const dchar i = reader_.get();
dstring value = i == '*' ? scanAlphaNumeric!("an alias")(startMark) dchar[] value = i == '*' ? scanAlphaNumeric!("an alias")(startMark)
: scanAlphaNumeric!("an anchor")(startMark); : scanAlphaNumeric!("an anchor")(startMark);
enforce((" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()) || enforce((" \t\0\n\r\u0085\u2028\u2029"d.canFind(reader_.peek()) ||
@ -1023,8 +1024,8 @@ final class Scanner
{ {
const startMark = reader_.mark; const startMark = reader_.mark;
dchar c = reader_.peek(1); dchar c = reader_.peek(1);
dstring handle = ""; dchar[] handle;
dstring suffix; dchar[] suffix;
if(c == '<') if(c == '<')
{ {
@ -1038,7 +1039,7 @@ final class Scanner
} }
else if(" \t\0\n\r\u0085\u2028\u2029"d.canFind(c)) else if(" \t\0\n\r\u0085\u2028\u2029"d.canFind(c))
{ {
suffix = "!"; suffix = "!"d.dup;
reader_.forward(); reader_.forward();
} }
else else
@ -1060,7 +1061,7 @@ final class Scanner
if(useHandle) { handle = scanTagHandle("tag", startMark); } if(useHandle) { handle = scanTagHandle("tag", startMark); }
else else
{ {
handle = "!"; handle = "!"d.dup;
reader_.forward(); reader_.forward();
} }
@ -1106,7 +1107,7 @@ final class Scanner
endMark = scalarBreaks[1]; endMark = scalarBreaks[1];
} }
dstring lineBreak = ""; dchar[] lineBreak = ""d.dup;
//Using appender_, so clear it when we're done. //Using appender_, so clear it when we're done.
scope(exit){appender_.clear();} scope(exit){appender_.clear();}
@ -1117,7 +1118,7 @@ final class Scanner
appender_.put(breaks); appender_.put(breaks);
const bool leadingNonSpace = !" \t"d.canFind(reader_.peek()); const bool leadingNonSpace = !" \t"d.canFind(reader_.peek());
appender_.put(scanToNextBreak()); appender_.put(scanToNextBreak());
lineBreak = ""d ~ scanLineBreak(); lineBreak = [scanLineBreak()];
auto scalarBreaks = scanBlockScalarBreaks(indent); auto scalarBreaks = scanBlockScalarBreaks(indent);
breaks = scalarBreaks[0]; breaks = scalarBreaks[0];
@ -1152,7 +1153,7 @@ final class Scanner
if(chomping != Chomping.Strip){appender_.put(lineBreak);} if(chomping != Chomping.Strip){appender_.put(lineBreak);}
if(chomping == Chomping.Keep){appender_.put(breaks);} if(chomping == Chomping.Keep){appender_.put(breaks);}
return scalarToken(startMark, endMark, utf32To8(cast(dstring)appender_.data), style); return scalarToken(startMark, endMark, utf32To8(appender_.data), style);
} }
///Scan chomping and indentation indicators of a scalar token. ///Scan chomping and indentation indicators of a scalar token.
@ -1269,7 +1270,7 @@ final class Scanner
} }
reader_.forward(); reader_.forward();
return scalarToken(startMark, reader_.mark, utf32To8(cast(dstring)appender_.data), quotes); return scalarToken(startMark, reader_.mark, utf32To8(appender_.data), quotes);
} }
///Scan nonspace characters in a flow scalar. ///Scan nonspace characters in a flow scalar.
@ -1338,7 +1339,7 @@ final class Scanner
to!string(reader_.peek(i)), reader_.mark)); to!string(reader_.peek(i)), reader_.mark));
} }
dstring hex = reader_.get(length); dchar[] hex = reader_.get(length);
appender_.put(cast(dchar)parse!int(hex, 16)); appender_.put(cast(dchar)parse!int(hex, 16));
} }
else if("\n\r\u0085\u2028\u2029"d.canFind(c)) else if("\n\r\u0085\u2028\u2029"d.canFind(c))
@ -1390,9 +1391,9 @@ final class Scanner
} }
/// Scan line breaks in a flow scalar. /// Scan line breaks in a flow scalar.
dstring scanFlowScalarBreaks(const Mark startMark) @safe pure dchar[] scanFlowScalarBreaks(const Mark startMark) @safe pure
{ {
auto appender = appender!dstring(); auto appender = appender!(dchar[])();
for(;;) for(;;)
{ {
// Instead of checking indentation, we check for document separators. // Instead of checking indentation, we check for document separators.
@ -1426,7 +1427,6 @@ final class Scanner
// We allow zero indentation for scalars, but then we need to check for // We allow zero indentation for scalars, but then we need to check for
// document separators at the beginning of the line. // document separators at the beginning of the line.
// if(indent == 0) { indent = 1; } // if(indent == 0) { indent = 1; }
dstring spaces;
mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029"d search; mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029"d search;
@ -1486,7 +1486,7 @@ final class Scanner
} }
spacesTransaction.__dtor(); spacesTransaction.__dtor();
const dstring slice = reader_.sliceBuilder.finish(); dstring slice = reader_.sliceBuilder.finish();
return scalarToken(startMark, endMark, slice.utf32To8, ScalarStyle.Plain); return scalarToken(startMark, endMark, slice.utf32To8, ScalarStyle.Plain);
} }
@ -1503,7 +1503,7 @@ final class Scanner
// Get as many plain spaces as there are. // Get as many plain spaces as there are.
size_t length = 0; size_t length = 0;
while(reader_.peek(length) == ' ') { ++length; } while(reader_.peek(length) == ' ') { ++length; }
const dstring whitespaces = reader_.get(length); dchar[] whitespaces = reader_.get(length);
dchar c = reader_.peek(); dchar c = reader_.peek();
// No newline after the spaces (if any) // No newline after the spaces (if any)
@ -1564,7 +1564,7 @@ final class Scanner
} }
/// Scan handle of a tag token. /// Scan handle of a tag token.
dstring scanTagHandle(const string name, const Mark startMark) @safe pure dchar[] scanTagHandle(const string name, const Mark startMark) @safe pure
{ {
dchar c = reader_.peek(); dchar c = reader_.peek();
enforce(c == '!', enforce(c == '!',
@ -1593,7 +1593,7 @@ final class Scanner
} }
/// Scan URI in a tag token. /// Scan URI in a tag token.
dstring scanTagURI(const string name, const Mark startMark) @system pure dchar[] scanTagURI(const string name, const Mark startMark) @system pure
{ {
// Note: we do not check if URI is well-formed. // Note: we do not check if URI is well-formed.
// Using appender_, so clear it when we're done. // Using appender_, so clear it when we're done.
@ -1621,11 +1621,11 @@ final class Scanner
new Error("While parsing a " ~ name, startMark, new Error("While parsing a " ~ name, startMark,
"expected URI, but found: " ~ c.to!string, reader_.mark)); "expected URI, but found: " ~ c.to!string, reader_.mark));
return cast(dstring)appender_.data; return appender_.data;
} }
/// Scan URI escape sequences. /// Scan URI escape sequences.
dstring scanURIEscapes(const string name, const Mark startMark) @system pure dchar[] scanURIEscapes(const string name, const Mark startMark) @system pure
{ {
ubyte[] bytes; ubyte[] bytes;
Mark mark = reader_.mark; Mark mark = reader_.mark;
@ -1659,7 +1659,7 @@ final class Scanner
reader_.forward(2); reader_.forward(2);
} }
try { return to!dstring(cast(string)bytes); } try { return to!(dchar[])(cast(string)bytes); }
catch(ConvException e) catch(ConvException e)
{ {
throw new Error("While scanning a " ~ name, startMark, e.msg, mark); throw new Error("While scanning a " ~ name, startMark, e.msg, mark);
@ -1702,8 +1702,9 @@ final class Scanner
private: private:
/// A nothrow function that converts a dstring to a string. /// A nothrow function that converts a dchar[] to a string.
string utf32To8(dstring str) @safe pure nothrow string utf32To8(C)(C[] str) @safe pure nothrow
if(is(Unqual!C == dchar))
{ {
try { return str.to!string; } try { return str.to!string; }
catch(ConvException e) { assert(false, "Unexpected invalid UTF-32 string"); } catch(ConvException e) { assert(false, "Unexpected invalid UTF-32 string"); }