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syntax.leg
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syntax.leg
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%{
#include <stdarg.h>
#include <string.h>
#include "ngs.h"
#include "ast.h"
#include "syntax.h"
#include "obj.h"
// gcc still warns about unused yymatchDot() and yyAccept(). clang does not.
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#pragma GCC diagnostic ignored "-Wunused-label"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#define YY_CTX_LOCAL 1
#define YY_MAX_LINES (10000)
// TODO: use read()
#define YY_INPUT(yy, buf, result, max_size) \
{ \
int yyc = getc(yy->input_file); \
if(yyc == EOF) { \
result = 0; \
} else { \
*(buf) = yyc; \
yy->seq_pos++; \
if(yyc == '\n') { \
yy->lines++; \
assert(yy->lines < YY_MAX_LINES); \
yy->lines_postions[yy->lines] = yy->seq_pos; \
} \
yyprintf((stderr, "<%c>", yyc)); \
result = 1; \
} \
}
#define ALLOC_NODE(dst, type_) (dst) = NGS_MALLOC(sizeof(ast_node)); dst->type=type_
#define CAPTURE_LOCATION(name) { \
name->location.first_line = location[0]; \
name->location.first_column = location[1]; \
name->location.last_line = location[2]; \
name->location.last_column = location[3]; \
}
#define MAKE_NODE(name, type_) \
ast_node *name = NGS_MALLOC(sizeof(*name)); name->type = type_; name->data = NULL; name->warning = NULL; \
CAPTURE_LOCATION(name) \
DEBUG_PARSER("[ast_node] at %p type %3d (%-12s) %d:%d-%d:%d\n", name, name->type, NGS_AST_NODE_TYPES_NAMES[name->type], name->location.first_line, name->location.first_column, name->location.last_line, name->location.last_column);
// TODO: check whether it's appropriate to use Boehm's "atomic" allocation.
#define COPY_NODE(dst, src) (dst) = NGS_MALLOC(sizeof(ast_node)); memcpy((dst), (src), sizeof(ast_node))
#define MAKE_REQ_ARG_NODE(name, val) MAKE_NODE(name, ARG_NODE); name->first_child = val; val->next_sibling = NULL;
#define PREPEND_NODE(list, elt) elt->next_sibling = list->first_child; list->first_child = elt; if(!list->last_child) { list->last_child=elt; };
#define MAKE_IDENTIFIER_NODE(var_name, s) MAKE_NODE(var_name, IDENTIFIER_NODE); var_name->name = ngs_strdup(s);
#define MAKE_STRING_NODE(var_name, s) \
MAKE_NODE(var_name, STR_COMPS_NODE); \
MAKE_NODE(var_name##_comp, STR_COMP_IMM_NODE); \
var_name##_comp->name = ngs_strdup(s); \
append_ast_node_child(var_name, var_name##_comp);
#define HANDLE_FAILED_MATCH(rule_name) \
if(yy->__pos > yy->fail_pos) {\
yy->fail_pos = yy->__pos; \
yy->fail_rule = rule_name; \
}
void append_ast_node_child(ast_node *target, ast_node *child) {
// printf("TARGET %p, CHILD %p\n", target, child);
if(!target->first_child) {
target->first_child = child;
target->last_child = child;
return;
}
target->last_child->next_sibling = child;
target->last_child = child;
}
ast_node *wrap_in_func(ast_node *node, int save_orig, int location[4], char *docstring, int args_are_optional, int argc, ...) {
int i;
va_list varargs;
ast_node *p;
MAKE_NODE(func, FUNC_NODE);
MAKE_NODE(params, PARAMS_NODE);
MAKE_STRING_NODE(doc, docstring);
func->first_child = params;
if(save_orig) {
func->data = (void *)node; // Save original node for possible unwrapping
}
params->next_sibling = node;
node->next_sibling = doc;
va_start(varargs, argc);
for(i=0, p=NULL; i<argc; i++) {
MAKE_NODE(param, PARAM_NODE);
MAKE_IDENTIFIER_NODE(param_name, va_arg(varargs, char *))
MAKE_IDENTIFIER_NODE(param_type, va_arg(varargs, char *))
param->first_child = param_name;
param_name->next_sibling = param_type;
if(args_are_optional) {
MAKE_NODE(dflt, NULL_NODE);
param_type->next_sibling = dflt;
}
if(p) {
p->next_sibling = param;
} else {
params->first_child = param;
}
p = param;
}
va_end(varargs);
return func;
}
// TODO: name the function
ast_node *call_node_partial_application(ast_node *orig, int location[4]) {
ast_node *p, *arg;
int save_orig = 0;
// Option 1:
// orig - CALL_NODE
// first_child - callable
// first_child->next_sibling - args
// first_child->next_sibling children - [arg]
// Option 2:
// orig - FIELD_NODE or NS_NODE (which are later treated as call nodes)
// Handle erroneously wrapped X.something when it's actually X.something(blah)
if(orig->type == CALL_NODE && orig->first_child->type == FUNC_NODE && orig->first_child->data) {
((ast_node *)(orig->first_child->data))->next_sibling = orig->first_child->next_sibling;
orig->first_child = orig->first_child->data;
return wrap_in_func(orig, 0, location, "Partial application syntax - X.something(blah)", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
save_orig = orig->type == FIELD_NODE || orig->type == NS_NODE;
p = orig->first_child;
if(p->type == FIELD_NODE || p->type == NS_NODE) {
// TODO: apply call_node_partial_application later so it will not be a special case?
p = p->first_child;
}
if(p->type == IDENTIFIER_NODE && strlen(p->name) == 1) {
if(p->name[0] == 'X' || p->name[0] == 'Y' || p->name[0] == 'Z') {
// wrap_in_func(ast_node *node, int location[4], char *docstring, int argc, ...) {
return wrap_in_func(orig, save_orig, location, "Partial application syntax", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
}
if(orig->type == FIELD_NODE || orig->type == NS_NODE) {
if(orig->first_child->next_sibling->type == EXPRESSIONS_NODE) {
p = orig->first_child->next_sibling->first_child;
if(p && !p->next_sibling && p->type == IDENTIFIER_NODE) {
if(p->name[0] == 'X' || p->name[0] == 'Y' || p->name[0] == 'Z') {
return wrap_in_func(orig, save_orig, location, "Partial application syntax", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
}
}
return orig;
}
for(p=orig->first_child->next_sibling->first_child; p; p=p->next_sibling) {
arg = p->first_child;
if(arg->type == IDENTIFIER_NODE && strlen(arg->name) == 1) {
if(arg->name[0] == 'X' || arg->name[0] == 'Y' || arg->name[0] == 'Z') {
// wrap_in_func(ast_node *node, int location[4], char *docstring, int argc, ...) {
return wrap_in_func(orig, save_orig, location, "Partial application syntax", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
}
}
return orig;
}
// TODO: name the function
ast_node *string_node_partial_application(ast_node *orig, int location[4]) {
ast_node *p, *pp;
assert(orig->type == STR_COMPS_NODE);
for(p=orig->first_child; p; p=p->next_sibling) {
if(p->type == STR_COMP_IMM_NODE) {
pp = p;
} else {
pp = p->first_child;
}
if(pp->type == EXPRESSIONS_NODE && pp->first_child && !pp->first_child->next_sibling && pp->first_child->type == IDENTIFIER_NODE) {
pp = pp->first_child;
}
if(pp->type == IDENTIFIER_NODE && strlen(pp->name) == 1) {
if(pp->name[0] == 'X' || pp->name[0] == 'Y' || pp->name[0] == 'Z') {
// wrap_in_func(ast_node *node, int location[4], char *docstring, int argc, ...) {
return wrap_in_func(orig, 0, location, "Partial application syntax - string", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
}
}
return orig;
}
ast_node *index_node_partial_application(ast_node *orig, int location[4]) {
ast_node *p;
for(p=orig->first_child; p; p=p->next_sibling) {
if(p->type == IDENTIFIER_NODE && strlen(p->name) == 1) {
if(p->name[0] == 'X' || p->name[0] == 'Y' || p->name[0] == 'Z') {
return wrap_in_func(orig, 0, location, "Partial application syntax - index syntax", 1, 3, "X", "Any", "Y", "Any", "Z", "Any");
}
}
}
return orig;
}
// TODO: more efficient than two scans
ast_node *copy_ast_tree(ast_node *src) {
ast_node *dst, *p;
if(!src) return NULL;
dst = NGS_MALLOC(sizeof(*dst));
assert(dst);
memcpy(dst, src, sizeof(*dst));
dst->first_child = copy_ast_tree(dst->first_child);
dst->next_sibling = copy_ast_tree(dst->next_sibling);
for(p = dst->first_child; p; p=p->next_sibling) {
// nothing
}
dst->last_child = p;
return dst;
}
int is_exportable(ast_node *node) {
assert(node->type == IDENTIFIER_NODE);
if(!node->name) return 0;
return node->name[0] != '_';
}
void process_namespace(ast_node *first_child, int location[4]) {
ast_node *node, *identifier_to_export;
for(node = first_child; node ; node = node->next_sibling) {
identifier_to_export = NULL;
if(node->type == ASSIGNMENT_NODE && node->first_child->type == IDENTIFIER_NODE) {
identifier_to_export = node->first_child;
}
if(node->type == FUNC_NODE) {
if(node->first_child->next_sibling->next_sibling->next_sibling) {
// Function has a name
identifier_to_export = node->first_child->next_sibling->next_sibling->next_sibling;
}
}
if(node->type == SECTION_NODE) {
process_namespace(node->first_child->next_sibling->first_child, location);
continue;
}
if(identifier_to_export && is_exportable(identifier_to_export)) {
MAKE_NODE(e, ASSIGNMENT_NODE);
MAKE_NODE(lhs, INDEX_NODE);
MAKE_IDENTIFIER_NODE(exports_identifier, "_exports");
append_ast_node_child(lhs, exports_identifier);
MAKE_STRING_NODE(exports_key, ngs_strdup(identifier_to_export->name));
append_ast_node_child(lhs, exports_key);
append_ast_node_child(e, lhs);
append_ast_node_child(e, copy_ast_tree(identifier_to_export));
e->next_sibling = node->next_sibling;
node->next_sibling = e;
node = e; // Skip over newly created node
}
}
}
%}
start =
commands eof
eof = !.
space = [ \t\n]+
inline_space = [ \t]+
newline_space = (inline_space? [\n]+ inline_space?)+
commands =
space? c:command commands-separator cs:commands {
if(c) {
PREPEND_NODE(cs, c);
}
$$ = cs;
CAPTURE_LOCATION($$);
}
|
c:command commands-separator? space? {
MAKE_NODE(ret, EXPRESSIONS_NODE);
ret->first_child = c;
ret->last_child = c;
$$ = ret;
CAPTURE_LOCATION($$);
}
|
{
MAKE_NODE(ret, EXPRESSIONS_NODE);
$$ = ret;
}
commands-separator = newline_space | inline_space? [;] inline_space?
items-separator = newline_space | inline_space? [,] space?
comment =
"#" [^\n]* { $$ = NULL; }
|
"TEST " [^\n]+ { $$ = NULL; }
command =
curly-code-block
|
assignment
|
inplace-assignment
|
function-definition
|
function-call
|
type
|
namespace
|
block
|
section
|
if
|
while
|
switch
|
for
|
& (identifier ("." | "::")) expression
|
comment
|
cp:commands-pipeline {
// TODO: constants for flags
MAKE_STRING_NODE(option_pair, "top_level")
MAKE_STRING_NODE(option_name, "top_level")
append_ast_node_child(option_pair, option_name);
MAKE_NODE(option_value, TRUE_NODE);
append_ast_node_child(option_pair, option_value);
append_ast_node_child($$->first_child->next_sibling->next_sibling->next_sibling, option_pair);
cp->number = 1;
$$ = cp;
}
curly-code-block =
space? '{' space? code:expressions space? ";"? space? '}' {
$$ = code;
}
empty-curly-code-block =
space? '{' space? '}' {
MAKE_NODE(code, EXPRESSIONS_NODE);
$$ = code;
}
code-block = curly-code-block | expression
expressions =
e:expression expression-delimiter es:expressions {
if(e) {
PREPEND_NODE(es, e);
}
$$ = es;
CAPTURE_LOCATION($$);
}
|
e:expression {
MAKE_NODE(ret, EXPRESSIONS_NODE);
ret->first_child = e;
ret->last_child = e;
$$ = ret;
}
expression-delimiter =
newline_space
|
inline_space? ";" space?
expression =
comment
|
e:binop-expression (inline_space comment)? { $$ = e; }
binop-expression = e:binop-expression-inner {
// Handle special "and" and "or" nodes.
AST_NODE_TYPE_LL *ll;
ast_node *cur, *arg0_node;
for(ll = yy->nodes_for_type_change; ll; ll=ll->next) {
cur = ll->node;
if(cur->type == ll->type) {
// Already processed this node
// Warn here maybe? Duplicates should not appear here.
continue;
}
assert(cur->type == CALL_NODE);
arg0_node = cur->first_child->next_sibling->first_child;
cur->type = ll->type;
cur->first_child = arg0_node->first_child;
cur->first_child->next_sibling = arg0_node->next_sibling->first_child;
}
yy->nodes_for_type_change = NULL;
$$ = e;
}
binop-expression-inner =
e1:chain-expression (b:binop e2:chain-expression {
// TODO: cleaner code and better naming
MAKE_NODE(args, ARGS_NODE);
b->next_sibling = args;
if(e1->type == CALL_NODE && e1->number && e1->number < b->number) {
MAKE_NODE(next_node, CALL_NODE);
next_node->first_child = b;
next_node->number = b->number;
MAKE_REQ_ARG_NODE(a2, e2);
args->first_child = e1->first_child->next_sibling->first_child->next_sibling;
args->first_child->next_sibling = a2;
MAKE_REQ_ARG_NODE(arg_for_next_node, next_node);
e1->first_child->next_sibling->first_child->next_sibling = arg_for_next_node;
} else {
MAKE_NODE(ret, CALL_NODE);
ret->first_child = b;
ret->number = b->number;
// args
MAKE_REQ_ARG_NODE(a1, e1);
MAKE_REQ_ARG_NODE(a2, e2);
a1->next_sibling = a2;
args->first_child = a1;
ret = call_node_partial_application(ret, location);
e1 = ret;
}
if(e1->first_child && e1->first_child->type == IDENTIFIER_NODE) {
ast_node_type t=0;
AST_NODE_TYPE_LL *ll;
if(!strcmp("and", e1->first_child->name)) { t = AND_NODE; }
if(!strcmp("or", e1->first_child->name)) { t = OR_NODE; }
if(!strcmp("tand", e1->first_child->name)) { t = TAND_NODE; }
if(!strcmp("tor", e1->first_child->name)) { t = TOR_NODE; }
if(t) {
// TODO: dedup. Somehow "or" node in 'echo("a" == "a" or "b" == "b")' is registered twice
ll = NGS_MALLOC(sizeof(*ll));
assert(ll);
ll->node = e1;
ll->type = t;
ll->next = yy->nodes_for_type_change;
yy->nodes_for_type_change = ll;
}
}
}
|
space "returns" {
// e1 returns e2 => if e1 { return e2 }
MAKE_NODE(ret, IF_NODE);
ret->first_child = e1;
MAKE_NODE(yes, RETURN_NODE);
MAKE_NODE(if_yes, NULL_NODE);
yes->first_child = if_yes;
e1->next_sibling = yes;
MAKE_NODE(no, NULL_NODE);
yes->next_sibling = no;
e1 = ret;
} (inline_space e2:expression {
// if -> old e1 -> return -> return value
e1->first_child->next_sibling->first_child = e2;
})?
|
space "breaks" {
// e1 breaks => if e1 { break }
MAKE_NODE(ret, IF_NODE);
ret->first_child = e1;
MAKE_NODE(yes, BREAK_NODE);
e1->next_sibling = yes;
MAKE_NODE(no, NULL_NODE);
yes->next_sibling = no;
e1 = ret;
}
|
space "continues" {
// e1 continues => if e1 { continue }
MAKE_NODE(ret, IF_NODE);
ret->first_child = e1;
MAKE_NODE(yes, CONTINUE_NODE);
e1->next_sibling = yes;
MAKE_NODE(no, NULL_NODE);
yes->next_sibling = no;
e1 = ret;
}
|
space "throws" space e2:expression {
// e1 throws e2 => if e1 { throw e2 }
MAKE_NODE(ret, IF_NODE);
ret->first_child = e1;
MAKE_NODE(yes, THROW_NODE);
yes->first_child = e2;
e1->next_sibling = yes;
MAKE_NODE(no, NULL_NODE);
yes->next_sibling = no;
e1 = ret;
}
)* {
// XXX
$$ = e1;
}
binop = binop1 | binop2
binop1 = inline_space? (
<"|"> @@ 120 @@
| <"==="> @@ 130 @@
| <"!=="> @@ 130 @@
| <"=="> @@ 130 @@
| <"!="> @@ 130 @@
| <"=~"> @@ 130 @@
| <"!~"> @@ 130 @@
| <"->"> @@ 140 @@
| <"<="> @@ 150 @@
| <"<"> @@ 150 @@
| <">="> @@ 150 @@
| <">"> @@ 150 @@
| <"~~"> @@ 150 @@
| <"~"> @@ 150 @@
| <"...">@@ 160 @@
| <".."> @@ 160 @@
| <"+?"> @@ 190 @@
| <"+"> @@ 190 @@
| <"-"> @@ 190 @@
| <"*"> @@ 200 @@
| <"%"> @@ 200 @@
| <"/"> @@ 200 @@
| <"?"> @@ 200 @@
| <"\\"> @@ 200 @@
) space?
binop2 = inline_space op:binop2op space { $$ = op; }
binop2op =
<"is not"> @@ 90 @@
| <"is"> @@ 90 @@
| <"and"> @@ 65 @@
| <"or"> @@ 60 @@
| <"in"> @@ 70 @@
| <"not in"> @@ 70 @@
| <"tand"> @@ 50 @@
| <"tor"> @@ 40 @@
inplace-assignment-op = <[-+*/%]> {
MAKE_NODE(ret, IDENTIFIER_NODE);
ret->name = ngs_strdup(yytext);
$$ = ret;
}
chain-item = e:identifier
| e:array-literal
| e:imm-array-literal
| e:number
| e:string
| e:parenthesized-expr
| e:hash-literal
| e:imm-hash-literal
| e:abc-function-literal
| e:subshell
abc-function-literal {
$$ = e;
CAPTURE_LOCATION($$)
};
chain-expression = b:basic-expression (
inline_space? a:function-call-arguments {
// printf("CHAIN/FCALL\n");
MAKE_NODE(ret, CALL_NODE);
ret->first_child = b;
ret->first_child->next_sibling = a;
ret = call_node_partial_application(ret, location);
b = ret;
}
|
"[" space? idx:expression space? "]" {
MAKE_NODE(ret, INDEX_NODE);
ret->first_child = b;
ret->first_child->next_sibling = idx;
ret = index_node_partial_application(ret, location);
b = ret;
}
|
inline_space? op:inplace-assignment-op "=" space? e:expression {
MAKE_NODE(ret, ASSIGNMENT_NODE);
ret->number = 950; // XXX: needed?
MAKE_NODE(call_node, CALL_NODE);
call_node->first_child = op;
MAKE_NODE(call_args, ARGS_NODE);
MAKE_NODE(call_arg1, ARG_NODE);
call_arg1->first_child = copy_ast_tree(b);
call_arg1->first_child->next_sibling = NULL;
MAKE_NODE(call_arg2, ARG_NODE);
call_arg2->first_child = e;
call_arg2->first_child->next_sibling = NULL;
call_arg1->next_sibling = call_arg2;
call_args->first_child = call_arg1;
call_node->first_child->next_sibling = call_args;
ret->first_child = b;
b->next_sibling = call_node;
b = ret;
}
|
inline_space? ".=" space? e:expression {
MAKE_NODE(ret, ASSIGNMENT_NODE);
ret->number = 950; // XXX: needed?
ret->first_child = b;
if(e->type == CALL_NODE) {
MAKE_NODE(call_arg1, ARG_NODE);
call_arg1->first_child = copy_ast_tree(b);
call_arg1->next_sibling = e->first_child->next_sibling->first_child;
e->first_child->next_sibling->first_child = call_arg1;
b->next_sibling = e;
} else {
MAKE_NODE(field_node, FIELD_NODE);
append_ast_node_child(field_node, copy_ast_tree(b));
append_ast_node_child(field_node, e);
b->next_sibling = field_node;
}
b = ret;
}
|
inline_space? "=" space? e:expression {
MAKE_NODE(ret, ASSIGNMENT_NODE);
b->next_sibling = e;
ret->first_child = b;
b = ret;
}
|
"." e:chain-item {
MAKE_NODE(ret, FIELD_NODE);
ret->number = 902;
ret->first_child = b;
ret->first_child->next_sibling = e;
ret = call_node_partial_application(ret, location);
b = ret;
}
|
"::" e:chain-item {
MAKE_NODE(ret, NS_NODE);
ret->number = 903;
ret->first_child = b;
ret->first_child->next_sibling = e;
ret = call_node_partial_application(ret, location);
b = ret;
}
)*
{
$$ = b;
CAPTURE_LOCATION($$)
}
basic-expression =
if
| while
| switch
| cond
| for
| comment
| "null" { MAKE_NODE(ret, NULL_NODE); $$ = ret; }
| "true" { MAKE_NODE(ret, TRUE_NODE); $$ = ret; }
| "false" { MAKE_NODE(ret, FALSE_NODE); $$ = ret; }
| number
| string
| regexp
| assignment
| inplace-assignment
| var-scope-declaration
| function-definition
| return
| break
| continue
| namespace
| collector
| block
| section
| guard
| try-catch
| throw
| type
| subshell
| super
| PRINT_AST
| identifier
| array-literal
| imm-array-literal
| hash-literal
| abc-function-literal
| imm-hash-literal
| tree-literal
| parenthesized-expr
parenthesized-expr = "(" space? e:expression space? ")" {
MAKE_NODE(ret, EXPRESSIONS_NODE);
ret->name = "()";
ret->first_child = e;
ret->last_child = e;
$$ = ret;
}
assignment =
i:identifier space? "=" space? e:expression {
MAKE_NODE(ret, ASSIGNMENT_NODE);
i->next_sibling = e;
ret->first_child = i;
$$ = ret;
}
inplace-assignment = i:identifier space? op:inplace-assignment-op "=" space? e:expression {
MAKE_NODE(ret, ASSIGNMENT_NODE);
MAKE_NODE(call_node, CALL_NODE);
call_node->first_child = op;
MAKE_NODE(call_args, ARGS_NODE);
MAKE_NODE(call_arg1, ARG_NODE);
call_arg1->first_child = copy_ast_tree(i);
call_arg1->first_child->next_sibling = NULL;
MAKE_NODE(call_arg2, ARG_NODE);
call_arg2->first_child = e;
call_arg2->first_child->next_sibling = NULL;
call_arg1->next_sibling = call_arg2;
call_args->first_child = call_arg1;
call_node->first_child->next_sibling = call_args;
ret->first_child = i;
i->next_sibling = call_node;
$$ = ret;
}
function-definition =
doc:optional-doc inline_space? "F" name:function-definition-name space? "(" space? params:function-definition-parameters space? ")" space? body:code-block {
MAKE_NODE(ret, FUNC_NODE);
ret->first_child = params;
params->next_sibling = body;
body->next_sibling = doc;
doc->next_sibling = name;
$$ = ret;
}
function-definition-name =
space+ (
i:identifier { $$ = i; }
| ("'" <([-|=!@?<>~+*/%()$a-zA-Z0-9.`": ]|"["|"]")+> "'" | <[-|=!@?~+*/%$.`\\]+> ) {
MAKE_NODE(ret, IDENTIFIER_NODE);
ret->name = ngs_strdup(yytext);
$$ = ret;
}
)
| { $$ = NULL; }
function-definition-parameters =
acc:params-node
(
arg:function-definition-parameter { append_ast_node_child(acc, $$); }
(items-separator arg:function-definition-parameter { append_ast_node_child(acc, $$); } )*
)* {
$$ = acc;
CAPTURE_LOCATION($$);
}
params-node = { MAKE_NODE(ret, PARAMS_NODE); $$ = ret; }
# TODO: make sure it's the last one (or the last ones are *args, **kwargs later)
# *args at any other positon is a syntax error for now
function-definition-parameter =
"**" space? i:identifier {
MAKE_NODE(ret, PARAM_NODE);
MAKE_NODE(arr, IDENTIFIER_NODE);
arr->name = "Hash";
MAKE_NODE(splat, HASH_SPLAT_NODE);
ret->first_child = i;
i->next_sibling = arr;
arr->next_sibling = splat;
$$ = ret;
}
|
"*" space? i:identifier {
MAKE_NODE(ret, PARAM_NODE);
MAKE_NODE(arr, IDENTIFIER_NODE);
arr->name = "Arr";
MAKE_NODE(splat, ARR_SPLAT_NODE);
ret->first_child = i;
i->next_sibling = arr;
arr->next_sibling = splat;
$$ = ret;
}
|
i:identifier t:function-definition-parameter-type d:function-definition-default-value {
MAKE_NODE(ret, PARAM_NODE);
ret->first_child = i;
i->next_sibling = t;
t->next_sibling = d;
$$ = ret;
}
# TODO: check if we can remove c:identifier limitation and let it be something
# like expression. Currently the problem with expression is that it
# captures assignment so you can't do "x:Int=10". It gives var "x" and type "10"
# when evaluated.
function-definition-parameter-type =
space? ":" space? c:identifier { $$ = c; }
|
{
MAKE_NODE(ret, IDENTIFIER_NODE);
ret->name = "Any";
$$ = ret;
}
function-definition-default-value =
space? "=" space? c:expression { $$ = c; }
|
{
$$ = NULL;
}
namespace = "ns" opt_params:namespace-optional-parameters (c:curly-code-block | c:empty-curly-code-block) {
// ns(opt_params) { c } OR ns(opt_params) { }
// (transforms to)
// F(opt_params) {
// local _exports
// _exports = Namespace()
// c
// _exports
// }()
MAKE_NODE(code, EXPRESSIONS_NODE);
// local _exports
MAKE_NODE(local_exports, LOCAL_NODE);
MAKE_IDENTIFIER_NODE(local_exports_identifier, "_exports")
append_ast_node_child(local_exports, local_exports_identifier);
append_ast_node_child(code, local_exports);
// exports = Namespace()
MAKE_NODE(set_exports, ASSIGNMENT_NODE);
MAKE_IDENTIFIER_NODE(exports_identifier, "_exports")
append_ast_node_child(set_exports, exports_identifier);
MAKE_NODE(call_namespace_constructor, CALL_NODE);
MAKE_IDENTIFIER_NODE(namespace_constructor, "Namespace");
MAKE_NODE(namespace_constructor_args, ARGS_NODE);
call_namespace_constructor->first_child = namespace_constructor;
namespace_constructor->next_sibling = namespace_constructor_args;
append_ast_node_child(set_exports, call_namespace_constructor);
append_ast_node_child(code, set_exports);
// SET NAMESPACE FOR COMPILER PHASE
MAKE_NODE(set_ns, SET_NS_NODE);
MAKE_IDENTIFIER_NODE(set_ns_exports_identifier, "_exports")
append_ast_node_child(set_ns, set_ns_exports_identifier);
append_ast_node_child(code, set_ns);
// c, the original body
append_ast_node_child(code, c);
// exports
MAKE_IDENTIFIER_NODE(exports_identifier2, "_exports")
append_ast_node_child(code, exports_identifier2);
// F() { ... } ()
MAKE_NODE(ret, CALL_NODE);
// TODO: better location. Currently points only to "ns" string.
ast_node *callable = wrap_in_func(code, 0, location, "Namespace syntax", 0, 0);
if(opt_params->type == PARAMS_NODE) {
opt_params->next_sibling = callable->first_child->next_sibling;
callable->first_child = opt_params;
}
append_ast_node_child(ret, callable);
MAKE_NODE(args, ARGS_NODE);
append_ast_node_child(ret, args);
// TODO: make "exports['var'] = var" conditional - only if "var" is local
process_namespace(c->first_child, location);
$$ = ret;
}
namespace-optional-parameters =
space? "(" space? params:function-definition-parameters space? ")" { $$ = params; }
|
{ MAKE_NODE(ret, NULL_NODE); $$ = ret; }
identifier-as-text = <[%_a-zA-Z]+[_a-zA-Z0-9]*> {
MAKE_STRING_NODE(s, yytext);
$$ = s;
}
text-till-eol = <[^\n]+> [\n] {
MAKE_STRING_NODE(s, yytext);
$$ = s;
}
doc-line =
inline_space? "doc " id:identifier-as-text " -" inline_space? [\n] {
MAKE_NODE(kv, EXPRESSIONS_NODE);
MAKE_STRING_NODE(v, "");
append_ast_node_child(kv, id);
append_ast_node_child(kv, v);
$$ = kv;
}
|
inline_space? "doc " id:identifier-as-text " - " txt:text-till-eol {
MAKE_NODE(kv, EXPRESSIONS_NODE);
append_ast_node_child(kv, id);
append_ast_node_child(kv, txt);
$$ = kv;
}
|
inline_space? "doc " txt:text-till-eol {
MAKE_NODE(kv, EXPRESSIONS_NODE);
MAKE_STRING_NODE(k, "");
append_ast_node_child(kv, k);
append_ast_node_child(kv, txt);
$$ = kv;
}
|
inline_space? "doc" inline_space? [\n] {
$$ = NULL;
}
doc-lines = acc:doc-node (l:doc-line {
if(l) {
// kv-pair STR_COMPS_NODE STR_COMP_IMM_NODE
if(acc->last_child && (!strcmp(acc->last_child->first_child->first_child->name, l->first_child->first_child->name))) {
// Same key as above - append the text to existing array
append_ast_node_child(acc->last_child->first_child->next_sibling, l->first_child->next_sibling);
} else {
// New key - make new array
MAKE_NODE(kv, EXPRESSIONS_NODE);
MAKE_NODE(arr, ARR_LIT_NODE);
append_ast_node_child(arr, l->first_child->next_sibling);
append_ast_node_child(kv, l->first_child);
append_ast_node_child(kv, arr);
append_ast_node_child(acc, kv);
}
}
})+ { $$ = acc; }
doc-node = { MAKE_NODE(ret, HASH_LIT_NODE); $$ = ret; }
optional-doc =
e:doc-lines { $$ = e; }
|
{ MAKE_NODE(ret, NULL_NODE); $$ = ret; }
function-call =
f:basic-expression inline_space? args:function-call-arguments {
MAKE_NODE(ret, CALL_NODE);
ret->first_child = f;
ret->first_child->next_sibling = args;
ret = call_node_partial_application(ret, location);
$$ = ret;
}
function-call-arguments = "(" space? a:function-call-arguments-without-parens space? ")" (space w:function-call-external-argument {
append_ast_node_child(a, w);
})* {
$$ = a;
}
# NOTE: the "=>" syntax is deprecated
function-call-external-argument =
("with" | "do") space a:function-call-argument {
$$ = a;
}
|
i:identifier space? "=>" space? e:expression {
MAKE_NODE(ret, ARG_NODE);
ret->first_child = e;
MAKE_STRING_NODE(arg_name, i->name);
e->next_sibling = arg_name;
ret->warning = ngs_strdup("Using deprecated key/value arrow syntax for external function call argument of the form f() k => v");
$$ = ret;
}
function-call-arguments-without-parens =
acc:args-node
(
arg:function-call-argument { append_ast_node_child(acc, $$); }
(items-separator arg:function-call-argument { append_ast_node_child(acc, $$); } )*
)* {
$$ = acc;
CAPTURE_LOCATION($$);
}
args-node = { MAKE_NODE(ret, ARGS_NODE); $$ = ret; }
function-call-argument =
i:identifier space? "=" space? e:expression {
MAKE_NODE(ret, ARG_NODE);
ret->first_child = e;