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| 186 | it. This is mainly useful to get the contents of a macro in string form, |
186 | it. This is mainly useful to get the contents of a macro in string form, |
| 187 | e.g.: |
187 | e.g.: |
| 188 | |
188 | |
| 189 | #define SQL_LIMIT 100 |
189 | #define SQL_LIMIT 100 |
| 190 | sql_exec ("select * from table limit " ECB_STRINGIFY (SQL_LIMIT)); |
190 | sql_exec ("select * from table limit " ECB_STRINGIFY (SQL_LIMIT)); |
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191 | |
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192 | =item ECB_STRINGIFY_EXPR (expr) |
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193 | |
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194 | Like C<ECB_STRINGIFY>, but additionally evaluates C<expr> to make sure it |
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195 | is a valid expression. This is useful to catch typos or cases where the |
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196 | macro isn't available: |
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197 | |
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198 | #include <errno.h> |
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199 | |
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200 | ECB_STRINGIFY (EDOM); // "33" (on my system at least) |
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201 | ECB_STRINGIFY_EXPR (EDOM); // "33" |
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202 | |
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203 | // now imagine we had a typo: |
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204 | |
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205 | ECB_STRINGIFY (EDAM); // "EDAM" |
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206 | ECB_STRINGIFY_EXPR (EDAM); // error: EDAM undefined |
| 191 | |
207 | |
| 192 | =back |
208 | =back |
| 193 | |
209 | |
| 194 | =head2 ATTRIBUTES |
210 | =head2 ATTRIBUTES |
| 195 | |
211 | |
