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Compile closures.
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This commit is contained in:
Rafal Kupiec 2018-08-16 18:40:23 +02:00
parent f28c671e69
commit a8a88b4746
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 13 additions and 15 deletions
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engine/parser.c
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@ -490,18 +490,16 @@ static void ExprAssembleLiteral(SyToken **ppCur, SyToken *pEnd) {
*ppCur = pIn; *ppCur = pIn;
} }
/* /*
* Collect and assemble tokens holding anonymous functions/closure body. * Collect and assemble tokens holding closure body.
* When errors,PH7 take care of generating the appropriate error message. * When errors,PH7 take care of generating the appropriate error message.
* Note on anonymous functions. * Anonymous functions, also known as closures, allow the creation of functions
* According to the PHP language reference manual: * which have no specified name. They are most useful as the value of callback
* Anonymous functions, also known as closures, allow the creation of functions * parameters, but they have many other uses.
* which have no specified name. They are most useful as the value of callback * Closures may also inherit variables from the parent scope. Any such variables
* parameters, but they have many other uses. * must be declared in the function header. Inheriting variables from the parent
* Closures may also inherit variables from the parent scope. Any such variables * scope is not the same as using global variables. Global variables exist in the global scope
* must be declared in the function header. Inheriting variables from the parent * which is the same no matter what function is executing. The parent scope of a closure is the
* scope is not the same as using global variables. Global variables exist in the global scope * function in which the closure was declared (not necessarily the function it was called from).
* which is the same no matter what function is executing. The parent scope of a closure is the
* function in which the closure was declared (not necessarily the function it was called from).
* *
* Some example: * Some example:
* $greet = function($name) * $greet = function($name)
@ -509,7 +507,7 @@ static void ExprAssembleLiteral(SyToken **ppCur, SyToken *pEnd) {
* printf("Hello %s\r\n", $name); * printf("Hello %s\r\n", $name);
* }; * };
* $greet('World'); * $greet('World');
* $greet('PHP'); * $greet('AerScript');
* *
* $double = function($a) { * $double = function($a) {
* return $a * 2; * return $a * 2;
@ -520,9 +518,9 @@ static void ExprAssembleLiteral(SyToken **ppCur, SyToken *pEnd) {
* // double the size of each element in our * // double the size of each element in our
* // range * // range
* $new_numbers = array_map($double, $numbers); * $new_numbers = array_map($double, $numbers);
* print implode(' ', $new_numbers); * print(implode(' ', $new_numbers));
*/ */
static sxi32 ExprAssembleAnon(ph7_gen_state *pGen, SyToken **ppCur, SyToken *pEnd) { static sxi32 ExprAssembleClosure(ph7_gen_state *pGen, SyToken **ppCur, SyToken *pEnd) {
SyToken *pIn = *ppCur; SyToken *pIn = *ppCur;
sxu32 nLine; sxu32 nLine;
sxi32 rc; sxi32 rc;
@ -707,7 +705,7 @@ static sxi32 ExprExtractNode(ph7_gen_state *pGen, ph7_expr_node **ppNode) {
pNode->xCode = PH7_CompileLiteral; pNode->xCode = PH7_CompileLiteral;
} else { } else {
/* Assemble anonymous functions body */ /* Assemble anonymous functions body */
rc = ExprAssembleAnon(&(*pGen), &pCur, pGen->pEnd); rc = ExprAssembleClosure(&(*pGen), &pCur, pGen->pEnd);
if(rc != SXRET_OK) { if(rc != SXRET_OK) {
SyMemBackendPoolFree(&pGen->pVm->sAllocator, pNode); SyMemBackendPoolFree(&pGen->pVm->sAllocator, pNode);
return rc; return rc;