How to perform expansions in a string in the context of a calling function in tcl -



How to perform expansions in a string in the context of a calling function in tcl -

how can implement expand in script below (expanding commands , variables normal in tcl), want print out:

' hello { $b } {tcl world} '

this how imagine script look:

proc clever_func {script} { set script [uplevel 1 expand [list $script]] puts "'$script'" } proc isolated_client_function {} { set hello set b hard set c tcl set d world clever_func { $a { $b } [list $c $d] } } isolated_client_function

an illustration isn't sufficient replacement specification, seems there no built-in tcl facility doing want. possible perform substitution on single command tail (by prepending list command , evalling @ level want), not pseudo-script 2 "commands". (it's possible string interpolation does, using subst, know why it's not want: expand $b).

i see 2 possibilities want:

tokenize input using sugar::scripttolist, perform substitution manually in list of tokens, convert result textual form sugar::listtoscript. these features of sugar macroprocessor designed allow modify scripts semantically while preserving formatting, comments , layout.

break downwards input separate "commands": first split @ each newline , semicolon, utilize info complete collect pieces corresponding finish "commands" (iirc there corner cases backslash-newline continuation: beware). on each finish "command" utilize trick of prepending "list ", evaluating result in necessary context (uplevel). each command you'll list substitution has been performed when appropiate. lose nuances of formatting within each "command" (like number of spaces separating words , kind of space), , lose original command separators unless take care remember them yourself. might not bad if goal kind of "pre-expanded script" evaluated later in other context.

tcl

Comments

Post a Comment

Popular posts from this blog

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer -

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer - when trying request rest service @ time of response getting exception.. feb 21, 2013 2:34:49 pm com.sun.jersey.spi.container.containerresponse mapmappablecontainerexception severe: exception contained within mappablecontainerexception not mapped response, re-throwing http container java.lang.noclassdeffounderror: not initialize class net.sf.cglib.proxy.enhancer @ org.hibernate.proxy.pojo.cglib.cgliblazyinitializer.getproxyfactory(cgliblazyinitializer.java:117) @ org.hibernate.proxy.pojo.cglib.cglibproxyfactory.postinstantiate(cglibproxyfactory.java:43) @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactory(pojoentitytuplizer.java:162) @ org.hibernate.tuple.entity.abstractentitytuplizer.<init>(abstractentitytuplizer.java:135) @ org.hibernate.tuple.entity.pojoentitytuplizer.<init>(pojoentitytuplizer.java:55) @ org.hibernate.tuple.e...
Read more

Accessing MATLAB's unicode strings from C -

Accessing MATLAB's unicode strings from C - how can access underlying unicode info of matlab strings through matlab engine or mex c interfaces? here's example. let's set unicode characters in utf-8 encoded file test.txt, read as fid=fopen('test.txt','r','l','utf-8'); s=fscanf(fid, '%s') in matlab. now if first feature('defaultcharacterset', 'utf-8') , c engevalstring(ep, "s") , output text file utf-8. proves matlab stores unicode internally. if mxarraytostring(enggetvariable(ep, "s")) , unicode2native(s, 'latin-1') give me in matlab: non-latin-1 characters replaced character code 26. need getting access underlying unicode info c string in unicode format (utf-8, utf-16, etc.), , preserving non-latin-1 characters. is possible? my platform os x, matlab r2012b. addendum: documentation explicitly states "[mxarraytostring()] supports multibyte encoded characters...
Read more

javascript - mongodb won't find my schema method in nested container -

javascript - mongodb won't find my schema method in nested container - i trying access method of schema stored within mixed container. here situation : have cases model can many different things, have schema each of these things stored in "casecontent" mixed property. var caseschema = mongoose.schema({ casecontent : {}, object : {type:string, default : "null"}, collision : {type : boolean, default : false} }); the casecontent property filled model of 1 of schemas, 1 exemple : var treeschema = new mongoose.schema({ applecount : {type : number, default : 3} }); treeschema.methods.dostuff = function (data) { console.log('hey, listen'); homecoming true; }; then, want utilize method of schema original container : caseschema.methods.dostuff = function (data) { if (this.casecontent.dostuff !== undefined) { this.casecontent.dostuff(); console.log('it worked'); } else { ...
Read more