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72 lines
2.6 KiB
C++
72 lines
2.6 KiB
C++
#pragma once
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#include "regex.h"
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#include <string>
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#include <ios>
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#include "stream.h"
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namespace YAML
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{
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////////////////////////////////////////////////////////////////////////////////
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// Here we store a bunch of expressions for matching different parts of the file.
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namespace Exp
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{
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// misc
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const RegEx Blank = RegEx(' ') || RegEx('\t');
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const RegEx Break = RegEx('\n');
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const RegEx BlankOrBreak = Blank || Break;
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const RegEx Digit = RegEx('0', '9');
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const RegEx Alpha = RegEx('a', 'z') || RegEx('A', 'Z');
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const RegEx AlphaNumeric = Alpha || Digit;
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const RegEx Hex = Digit || RegEx('A', 'F') || RegEx('a', 'f');
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// actual tags
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const RegEx DocStart = RegEx("---") + (BlankOrBreak || RegEx(EOF) || RegEx());
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const RegEx DocEnd = RegEx("...") + (BlankOrBreak || RegEx(EOF) || RegEx());
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const RegEx DocIndicator = DocStart || DocEnd;
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const RegEx BlockEntry = RegEx('-') + (BlankOrBreak || RegEx(EOF));
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const RegEx Key = RegEx('?'),
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KeyInFlow = RegEx('?') + BlankOrBreak;
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const RegEx Value = RegEx(':'),
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ValueInFlow = RegEx(':') + BlankOrBreak;
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const RegEx Comment = RegEx('#');
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const RegEx AnchorEnd = RegEx("?:,]}%@`", REGEX_OR) || BlankOrBreak;
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// Plain scalar rules:
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// . Cannot start with a blank.
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// . Can never start with any of , [ ] { } # & * ! | > \' \" % @ `
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// . In the block context - ? : must be not be followed with a space.
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// . In the flow context ? : are illegal and - must not be followed with a space.
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const RegEx PlainScalar = !(BlankOrBreak || RegEx(",[]{}#&*!|>\'\"%@`", REGEX_OR) || (RegEx("-?:", REGEX_OR) + Blank)),
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PlainScalarInFlow = !(BlankOrBreak || RegEx("?:,[]{}#&*!|>\'\"%@`", REGEX_OR) || (RegEx('-') + Blank));
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const RegEx IllegalColonInScalar = RegEx(':') + !BlankOrBreak;
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const RegEx EndScalar = RegEx(':') + BlankOrBreak,
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EndScalarInFlow = (RegEx(':') + BlankOrBreak) || RegEx(",:?[]{}", REGEX_OR);
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const RegEx EscSingleQuote = RegEx("\'\'");
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const RegEx EscBreak = RegEx('\\') + Break;
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const RegEx ChompIndicator = RegEx("+-", REGEX_OR);
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const RegEx Chomp = (ChompIndicator + Digit) || (Digit + ChompIndicator) || ChompIndicator || Digit;
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// and some functions
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std::string Escape(Stream& in);
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}
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namespace Keys
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{
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const char Directive = '%';
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const char FlowSeqStart = '[';
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const char FlowSeqEnd = ']';
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const char FlowMapStart = '{';
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const char FlowMapEnd = '}';
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const char FlowEntry = ',';
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const char Alias = '*';
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const char Anchor = '&';
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const char Tag = '!';
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const char LiteralScalar = '|';
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const char FoldedScalar = '>';
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}
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}
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