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| author | Igor Pashev <pashev.igor@gmail.com> | 2013-01-27 23:51:56 +0000 |
|---|---|---|
| committer | Igor Pashev <pashev.igor@gmail.com> | 2013-01-27 23:51:56 +0000 |
| commit | 6ab0c0f5bf14ed9c15370407b9ee7e0b4b089ae1 (patch) | |
| tree | 926065cf45450116098db664e3c61dced9e1f21a /ipl/procs/identity.icn | |
| download | icon-6ab0c0f5bf14ed9c15370407b9ee7e0b4b089ae1.tar.gz | |
Initial upstream version 9.4.3upstream/9.4.3
Diffstat (limited to 'ipl/procs/identity.icn')
| -rw-r--r-- | ipl/procs/identity.icn | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/ipl/procs/identity.icn b/ipl/procs/identity.icn new file mode 100644 index 0000000..8bf82c0 --- /dev/null +++ b/ipl/procs/identity.icn @@ -0,0 +1,35 @@ +############################################################################ +# +# File: identity.icn +# +# Subject: Procedures to produce identities for Icon types +# +# Author: Ralph E. Griswold +# +# Date: September 2, 1991 +# +############################################################################ +# +# This file is in the public domain. +# +############################################################################ +# +# This procedure produces an "identity" value for types that have one. +# +############################################################################ + +procedure identity(x) + + return case x of { + "null": &null + "integer": 0 + "real": 0.0 + "string": "" + "cset": '' + "list": [] + "set": set() + "table": table() + default: fail + } + +end |