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ENH: support default values in string expansion

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- syntax as per Bourne/Korn shell
      ${parameter:-defValue}

  If parameter is unset or null, the \c defValue is substituted.
  Otherwise, the value of parameter is substituted.
This commit is contained in:
Mark Olesen
2011-03-02 14:11:30 +01:00
parent 01ea4623f9
commit 3b72fc3e38
3 changed files with 129 additions and 8 deletions
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51
src/OpenFOAM/primitives/strings/stringOps/stringOps.H
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@ -55,7 +55,17 @@ namespace stringOps
// -# variables
// - "$VAR", "${VAR}"
//
// Any unknown entries are removed
// Supports default values as per the Bourne/Korn shell.
// \code
// "${parameter:-defValue}"
// \endcode
// If parameter is unset or null, the \c defValue is substituted.
// Otherwise, the value of parameter is substituted.
//
// Any unknown entries are removed silently.
//
// Malformed entries (eg, brace mismatch, sigil followed by bad character)
// are left as is.
//
// \note the leading sigil can be changed to avoid conflicts with other
// string expansions
@ -72,7 +82,17 @@ namespace stringOps
// -# variables
// - "$VAR", "${VAR}"
//
// Any unknown entries are removed
// Supports default values as per the Bourne/Korn shell.
// \code
// "${parameter:-defValue}"
// \endcode
// If parameter is unset or null, the \c defValue is substituted.
// Otherwise, the value of parameter is substituted.
//
// Any unknown entries are removed silently.
//
// Malformed entries (eg, brace mismatch, sigil followed by bad character)
// are left as is.
//
// \note the leading sigil can be changed to avoid conflicts with other
// string expansions
@ -128,7 +148,18 @@ namespace stringOps
// - leading "~user" : home directory for specified user
// - leading "~OpenFOAM" : site/user OpenFOAM configuration directory
//
// Any unknown entries are removed silently if allowEmpty is true
// Supports default values as per the Bourne/Korn shell.
// \code
// "${parameter:-defValue}"
// \endcode
// If parameter is unset or null, the \c defValue is substituted.
// Otherwise, the value of parameter is substituted.
//
// Any unknown entries are removed silently, if allowEmpty is true.
//
// Malformed entries (eg, brace mismatch, sigil followed by bad character)
// are left as is.
//
// \sa
// Foam::findEtcFile
string expand
@ -149,7 +180,19 @@ namespace stringOps
// - leading "~user" : home directory for specified user
// - leading "~OpenFOAM" : site/user OpenFOAM configuration directory
//
// Any unknown entries are removed silently if allowEmpty is true
// Supports default values as per the Bourne/Korn shell.
// \code
// "${parameter:-defValue}"
// \endcode
// If parameter is unset or null, the \c defValue is substituted.
// Otherwise, the value of parameter is substituted.
//
// Any unknown entries are removed silently, if allowEmpty is true.
//
// Malformed entries (eg, brace mismatch, sigil followed by bad character)
// are left as is.
//
// Any unknown entries are removed silently if allowEmpty is true.
// \sa
// Foam::findEtcFile
string& inplaceExpand