parseString parses a single- or double-quoted string.
()
| 133 | |
| 134 | // parseString parses a single- or double-quoted string. |
| 135 | func (p *parser) parseString() (result string, err error) { |
| 136 | i := p.i |
| 137 | if len(p.s) < i+2 { |
| 138 | return "", errors.New("expected string, found EOF instead") |
| 139 | } |
| 140 | |
| 141 | quote := p.s[i] |
| 142 | i++ |
| 143 | |
| 144 | loop: |
| 145 | for i < len(p.s) { |
| 146 | switch p.s[i] { |
| 147 | case '\\': |
| 148 | if len(p.s) > i+1 { |
| 149 | switch c := p.s[i+1]; c { |
| 150 | case '\r': |
| 151 | if len(p.s) > i+2 && p.s[i+2] == '\n' { |
| 152 | i += 3 |
| 153 | continue loop |
| 154 | } |
| 155 | fallthrough |
| 156 | case '\n', '\f': |
| 157 | i += 2 |
| 158 | continue loop |
| 159 | } |
| 160 | } |
| 161 | p.i = i |
| 162 | val, err := p.parseEscape() |
| 163 | if err != nil { |
| 164 | return "", err |
| 165 | } |
| 166 | i = p.i |
| 167 | result += val |
| 168 | case quote: |
| 169 | break loop |
| 170 | case '\r', '\n', '\f': |
| 171 | return "", errors.New("unexpected end of line in string") |
| 172 | default: |
| 173 | start := i |
| 174 | for i < len(p.s) { |
| 175 | if c := p.s[i]; c == quote || c == '\\' || c == '\r' || c == '\n' || c == '\f' { |
| 176 | break |
| 177 | } |
| 178 | i++ |
| 179 | } |
| 180 | result += p.s[start:i] |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | if i >= len(p.s) { |
| 185 | return "", errors.New("EOF in string") |
| 186 | } |
| 187 | |
| 188 | // Consume the final quote. |
| 189 | i++ |
| 190 | |
| 191 | p.i = i |
| 192 | return result, nil |