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ast_entfield node

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This commit is contained in:
Wolfgang Bumiller 2012-05-01 15:08:54 +02:00
parent eb21f1e733
commit 281bd8657a
2 changed files with 50 additions and 0 deletions
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23
ast.c
View file

@ -132,6 +132,24 @@ void ast_binary_delete(ast_binary *self)
mem_d(self);
}
ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
{
ast_instantiate(ast_entfield, ctx, ast_entfield_delete);
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_entfield_codegen);
self->entity = entity;
self->field = field;
return self;
}
void ast_entfield_delete(ast_entfield *self)
{
ast_unref(self->entity);
ast_unref(self->field);
mem_d(self);
}
ast_store* ast_store_new(lex_ctx ctx, int op,
ast_value *dest, ast_expression *source)
{
@ -316,3 +334,8 @@ bool ast_binary_codegen(ast_binary *self, ast_function *func, ir_value **out)
{
return false;
}
bool ast_entfield_codegen(ast_entfield *self, ast_function *func, ir_value **out)
{
return false;
}

27
ast.h
View file

@ -36,6 +36,7 @@ typedef struct ast_function_s ast_function;
typedef struct ast_block_s ast_block;
typedef struct ast_binary_s ast_binary;
typedef struct ast_store_s ast_store;
typedef struct ast_entfield_s ast_entfield;
/* Node interface with common components
*/
@ -137,6 +138,32 @@ bool ast_block_codegen(ast_block*, ast_function*, ir_value**);
*/
bool ast_binary_codegen(ast_binary*, ast_function*, ir_value**);
/* Entity-field
*
* This must do 2 things:
* -) Provide a way to fetch an entity field value. (Rvalue)
* -) Provide a pointer to an entity field. (Lvalue)
* The problem:
* In original QC, there's only a STORE via pointer, but
* no LOAD via pointer.
* So we must know beforehand if we are going to read or assign
* the field.
* For this we will have to extend the codegen() functions with
* a flag saying whether or not we need an L or an R-value.
*/
struct ast_entfield_s
{
ast_expression_common expression;
/* The entity can come from an expression of course. */
ast_expression *entity;
/* As can the field, it just must result in a value of TYPE_FIELD */
ast_expression *field;
};
ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field);
void ast_entfield_delete(ast_entfield*);
bool ast_entfield_codegen(ast_entfield*, ast_function*, ir_value**);
/* Store
*
* Stores left<-right and returns left.