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config param changeup

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changed some of the wording of the param config example.
Namely put the comment immediately below the example.
Also added --set to the noteable arguments list.
Also changed "compile(?: )?time" to "compile-time"
This commit is contained in:
Ian Bertolacci
2015-07-20 13:07:23 -07:00
parent d35d9d213c
commit 77daaef8ed
1 changed files with 9 additions and 8 deletions
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chapel.html.markdown
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@@ -32,7 +32,7 @@ stderr.writeln( "This goes to standard error" );
var myVar = 10; // 10 is an int, so myVar is implicitly an int var myVar = 10; // 10 is an int, so myVar is implicitly an int
myVar = -10; myVar = -10;
var mySecondVar = myVar; var mySecondVar = myVar;
// var anError; // this would be a compile time error. // var anError; // this would be a compile-time error.
// We can (and should) explicitly type things // We can (and should) explicitly type things
var myThirdVar: real; var myThirdVar: real;
@@ -57,11 +57,11 @@ var my64Real: real(64) = 1.516; // 64 bit (8 bytes) sized real
var intFromReal = myReal : int; var intFromReal = myReal : int;
var intFromReal2: int = myReal : int; var intFromReal2: int = myReal : int;
// consts are constants, they cannot be changed after set in runtime // consts are constants, they cannot be changed after set in runtime.
const almostPi: real = 22.0/7.0; const almostPi: real = 22.0/7.0;
// params are constants whose value must be known statically at compile time // params are constants whose value must be known statically at compile-time
// Like consts, they cannot be changed during runtime // Their value cannot be changed.
param compileTimeConst: int = 16; param compileTimeConst: int = 16;
// The config modifier allows values to be set at the command line // The config modifier allows values to be set at the command line
@@ -71,10 +71,10 @@ config var varCmdLineArg: int = -123;
config const constCmdLineArg: int = 777; config const constCmdLineArg: int = 777;
// Set with --VarName=Value or --VarName Value at run time // Set with --VarName=Value or --VarName Value at run time
// config params can be set at compile time // config params can be set/changed at compile-time
config param paramCmdLineArg: bool = false; config param paramCmdLineArg: bool = false;
// Set config with --set paramCmdLineArg=value at compile-time
writeln( varCmdLineArg, ", ", constCmdLineArg, ", ", paramCmdLineArg ); writeln( varCmdLineArg, ", ", constCmdLineArg, ", ", paramCmdLineArg );
// Set config with --set paramCmdLineArg=value at compile time
// refs operate much like a reference in C++ // refs operate much like a reference in C++
var actual = 10; var actual = 10;
@@ -465,7 +465,7 @@ genericProc( 1.0+2.0i, 3.0+4.0i );
// We can also enforce a form of polymorphism with the 'where' clause // We can also enforce a form of polymorphism with the 'where' clause
// This allows the compiler to decide which function to use. // This allows the compiler to decide which function to use.
// Note: that means that all information needs to be known at compile time. // Note: that means that all information needs to be known at compile-time.
// The param modifier on the arg is used to enforce this constraint. // The param modifier on the arg is used to enforce this constraint.
proc whereProc( param N : int ): void proc whereProc( param N : int ): void
where ( N > 0 ) { where ( N > 0 ) {
@@ -896,6 +896,7 @@ Builds like other compilers:
```chpl myFile.chpl -o myExe``` ```chpl myFile.chpl -o myExe```
A notable argument: Notable arguments:
* ``--fast``: enables a number of optimizations and disables array bounds checks. Should only enable when application is stable. * ``--fast``: enables a number of optimizations and disables array bounds checks. Should only enable when application is stable.
* ```--set <Symbol Name>=<Value>```: set config param <Symbol Name> to <Value> at compile-time