dmd.dtemplate

inout(Expression) isExpression(inout RootObject o);

These functions substitute for dynamic_cast. dynamic_cast does not work on earlier versions of gcc.

bool isError(const RootObject o);

Is this Object an error?

bool arrayObjectIsError(const Objects* args);

Are any of the Objects an error?

inout(Type) getType(inout RootObject o);

Try to get arg as a type.

class TemplateDeclaration: dmd.dsymbol.ScopeDsymbol;

[mixin] template Identifier (parameters) [Constraint] https://dlang.org/spec/template.html https://dlang.org/spec/template-mixin.html

int inuse;

for recursive expansion detection

bool overloadInsert(Dsymbol s);

Overload existing TemplateDeclaration 'this' with the new one 's'. Return true if successful; i.e. no conflict.

bool evaluateConstraint(TemplateInstance ti, Scope* sc, Scope* paramscope, Objects* dedargs, FuncDeclaration fd);

Check to see if constraint is satisfied.

Scope* scopeForTemplateParameters(TemplateInstance ti, Scope* sc);

Create a scope for the parameters of the TemplateInstance ti in the parent scope sc from the ScopeDsymbol paramsym.

If paramsym is null a new ScopeDsymbol is used in place of paramsym.

Parameters:

TemplateInstance ti	the TemplateInstance whose parameters to generate the scope for.
Scope* sc	the parent scope of ti

Returns:

a scope for the parameters of ti

MATCH matchWithInstance(Scope* sc, TemplateInstance ti, Objects* dedtypes, Expressions* fargs, int flag);

Given that ti is an instance of this TemplateDeclaration, deduce the types of the parameters to this, and store those deduced types in dedtypes[].

Input flag 1: don't do semantic() because of dummy types 2: don't change types in matchArg()

Output dedtypes deduced arguments Return match level.

MATCH leastAsSpecialized(Scope* sc, TemplateDeclaration td2, Expressions* fargs);

Determine partial specialization order of 'this' vs td2.

Returns:

match this is at least as specialized as td2 0 td2 is more specialized than this

MATCH deduceFunctionTemplateMatch(TemplateInstance ti, Scope* sc, ref FuncDeclaration fd, Type tthis, Expressions* fargs);

Match function arguments against a specific template function.

Input ti sc instantiation scope fd tthis 'this' argument if !NULL fargs arguments to function

Output fd Partially instantiated function declaration ti.tdtypes Expression/Type deduced template arguments

Returns:

match level bit 0-3 Match template parameters by inferred template arguments bit 4-7 Match template parameters by initial template arguments

RootObject declareParameter(Scope* sc, TemplateParameter tp, RootObject o);

Declare template parameter tp with value o, and install it in the scope sc.

FuncDeclaration doHeaderInstantiation(TemplateInstance ti, Scope* sc2, FuncDeclaration fd, Type tthis, Expressions* fargs);

Limited function template instantiation for using fd.leastAsSpecialized()

TemplateInstance findExistingInstance(TemplateInstance tithis, Expressions* fargs);

Given a new instance tithis of this TemplateDeclaration, see if there already exists an instance. If so, return that existing instance.

TemplateInstance addInstance(TemplateInstance ti);

Add instance ti to TemplateDeclaration's table of instances. Return a handle we can use to later remove it if it fails instantiation.

void removeInstance(TemplateInstance ti);

Remove TemplateInstance from table of instances.

Input handle returned by addInstance()

TemplateTupleParameter isVariadic();

Check if the last template parameter is a tuple one, and returns it if so, else returns null.

Returns:

The last template parameter if it's a TemplateTupleParameter

bool isOverloadable();

We can overload templates.

void functionResolve(Match* m, Dsymbol dstart, Loc loc, Scope* sc, Objects* tiargs, Type tthis, Expressions* fargs, const(char)** pMessage = null);

Given function arguments, figure out which template function to expand, and return matching result.

Parameters:

Match* m	matching result
Dsymbol dstart	the root of overloaded function templates
Loc loc	instantiation location
Scope* sc	instantiation scope
Objects* tiargs	initial list of template arguments
Type tthis	if !NULL, the 'this' pointer argument
Expressions* fargs	arguments to function
const(char)** pMessage	address to store error message, or null

bool reliesOnTident(Type t, TemplateParameters* tparams, size_t iStart = 0);

Check whether the type t representation relies on one or more the template parameters.

Parameters:

Type t	Tested type, if null, returns false.
TemplateParameters* tparams	Template parameters.
size_t iStart	Start index of tparams to limit the tested parameters. If it's nonzero, tparams[0..iStart] will be excluded from the test target.

abstract class TemplateParameter: dmd.root.rootobject.RootObject;

https://dlang.org/spec/template.html#TemplateParameter

MATCH matchArg(Loc instLoc, Scope* sc, Objects* tiargs, size_t i, TemplateParameters* parameters, Objects* dedtypes, Declaration* psparam);

Match to a particular TemplateParameter.

Input instLoc location that the template is instantiated. tiargs[] actual arguments to template instance i i'th argument parameters[] template parameters dedtypes[] deduced arguments to template instance *psparam set to symbol declared and initialized to dedtypes[i]

class TemplateTypeParameter: dmd.dtemplate.TemplateParameter;

https://dlang.org/spec/template.html#TemplateTypeParameter

Syntax ident : specType = defaultType

class TemplateThisParameter: dmd.dtemplate.TemplateTypeParameter;

https://dlang.org/spec/template.html#TemplateThisParameter

Syntax this ident : specType = defaultType

class TemplateValueParameter: dmd.dtemplate.TemplateParameter;

https://dlang.org/spec/template.html#TemplateValueParameter

Syntax valType ident : specValue = defaultValue

class TemplateAliasParameter: dmd.dtemplate.TemplateParameter;

https://dlang.org/spec/template.html#TemplateAliasParameter

Syntax specType ident : specAlias = defaultAlias

class TemplateTupleParameter: dmd.dtemplate.TemplateParameter;

https://dlang.org/spec/template.html#TemplateSequenceParameter

Syntax ident ...

class TemplateInstance: dmd.dsymbol.ScopeDsymbol;

https://dlang.org/spec/template.html#explicit_tmp_instantiation

Given foo!(args) => name = foo tiargs = args

this(ref const Loc loc, TemplateDeclaration td, Objects* tiargs);

This constructor is only called when we figured out which function template to instantiate.

final void printInstantiationTrace();

Given an error instantiating the TemplateInstance, give the nested TemplateInstance instantiations that got us here. Those are a list threaded into the nested scopes.

final Identifier getIdent();

Lazily generate identifier for template instance. This is because 75% of the ident's are never needed.

final int compare(RootObject o);

Compare proposed template instantiation with existing template instantiation. Note that this is not commutative because of the auto ref check.

Parameters:

RootObject o

existing template instantiation

Returns:

0 for match, 1 for no match

final bool needsCodegen();

Returns true if this is not instantiated in non-root module, and is a part of non-speculative instantiatiation.

Note minst does not stabilize until semantic analysis is completed, so don't call this function during semantic analysis to return precise result.

final bool findTempDecl(Scope* sc, WithScopeSymbol* pwithsym);

Find template declaration corresponding to template instance.

Returns:

false if finding fails.

Note This function is reentrant against error occurrence. If returns false, any members of this object won't be modified, and repetition call will reproduce same error.

final bool updateTempDecl(Scope* sc, Dsymbol s);

Confirm s is a valid template, then store it.

Input sc s candidate symbol of template. It may be: TemplateDeclaration FuncDeclaration with findTemplateDeclRoot() != NULL OverloadSet which contains candidates

Returns:

true if updating succeeds.

static bool semanticTiargs(ref const Loc loc, Scope* sc, Objects* tiargs, int flags);

Run semantic of tiargs as arguments of template.

Input loc sc tiargs array of template arguments flags 1: replace const variables with their initializers 2: don't devolve Parameter to Type

Returns:

false if one or more arguments have errors.

final bool semanticTiargs(Scope* sc);

Run semantic on the elements of tiargs.

Input sc

Returns:

false if one or more arguments have errors.

Note This function is reentrant against error occurrence. If returns false, all elements of tiargs won't be modified.

final bool needsTypeInference(Scope* sc, int flag = 0);

Determine if template instance is really a template function, and that template function needs to infer types from the function arguments.

Like findBestMatch, iterate possible template candidates, but just looks only the necessity of type inference.

final bool hasNestedArgs(Objects* args, bool isstatic);

Determines if a TemplateInstance will need a nested generation of the TemplateDeclaration. Sets enclosing property if so, and returns != 0;

final Dsymbols* appendToModuleMember();

Append 'this' to the specific module members[]

final void declareParameters(Scope* sc);

Declare parameters of template instance, initialize them with the template instance arguments.

final Identifier genIdent(Objects* args);

This instance needs an identifier for name mangling purposes. Create one by taking the template declaration name and adding the type signature for it.

void unSpeculative(Scope* sc, RootObject o);

IsExpression can evaluate the specified type speculatively, and even if it instantiates any symbols, they are normally unnecessary for the final executable. However, if those symbols leak to the actual code, compiler should remark them as non-speculative to generate their code and link to the final executable.

bool definitelyValueParameter(Expression e);

Return true if e could be valid only as a template value parameter. Return false if it might be an alias or tuple. (Note that even in this case, it could still turn out to be a value).

class TemplateMixin: dmd.dtemplate.TemplateInstance;

https://dlang.org/spec/template-mixin.html

Syntax mixin MixinTemplateName [TemplateArguments] [Identifier];

struct TemplateInstanceBox;

This struct is needed for TemplateInstance to be the key in an associative array. Fixing https://issues.dlang.org/show_bug.cgi?id=15812 and https://issues.dlang.org/show_bug.cgi?id=15813 would make it unnecessary.