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19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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27 /* Note: I will not be using a _t suffix for the
28 * "main" ast node types for now.
31 typedef union ast_node_u ast_node;
32 typedef union ast_expression_u ast_expression;
34 typedef struct ast_value_s ast_value;
35 typedef struct ast_function_s ast_function;
36 typedef struct ast_block_s ast_block;
37 typedef struct ast_binary_s ast_binary;
38 typedef struct ast_store_s ast_store;
40 /* Node interface with common components
42 typedef void ast_node_delete(ast_node*);
46 /* I don't feel comfortable using keywords like 'delete' as names... */
47 ast_node_delete *destroy;
48 /* keep: if a node contains this node, 'keep'
49 * prevents its dtor from destroying this node as well.
54 #define ast_delete(x) ( ( (ast_node*)(x) ) -> node.destroy )((ast_node*)(x))
55 #define ast_unref(x) do \
57 if (! (((ast_node*)(x))->node.keep) ) { \
62 /* Expression interface
64 * Any expression or block returns an ir_value, and needs
65 * to know the current function.
67 typedef bool ast_expression_codegen(ast_expression*,
73 ast_expression_codegen *codegen;
74 } ast_expression_common;
78 * Types are also values, both have a type and a name.
79 * especially considering possible constructs like typedefs.
81 * is like creating a 'float foo', foo serving as the type's name.
85 ast_expression_common expression;
104 /* if vtype is qc_function, params contain parameters, and
105 * 'next' the return type.
107 MEM_VECTOR_MAKE(ast_value*, params);
109 ast_value* ast_value_new(lex_ctx_t ctx, const char *name, int qctype, bool keep);
110 void ast_value_delete(ast_value*);
112 bool ast_value_set_name(ast_value*, const char *name);
114 bool ast_value_codegen(ast_value*, ast_function*, ir_value**);
118 * A value-returning binary expression.
122 ast_expression_common expression;
128 ast_binary* ast_binary_new(lex_ctx_t ctx,
132 void ast_binary_delete(ast_binary*);
134 /* hmm, seperate functions?
135 bool ast_block_codegen(ast_block*, ast_function*, ir_value**);
137 bool ast_binary_codegen(ast_binary*, ast_function*, ir_value**);
141 * Stores left<-right and returns left.
142 * Specialized binary expression node
146 ast_expression_common expression;
151 ast_store* ast_store_new(lex_ctx_t ctx, int op,
152 ast_value *d, ast_value *s);
153 void ast_store_delete(ast_store*);
155 bool ast_store_codegen(ast_store*, ast_function*, ir_value**);
162 ast_expression_common expression;
164 MEM_VECTOR_MAKE(ast_value*, locals);
165 MEM_VECTOR_MAKE(ast_expression*, exprs);
167 ast_block* ast_block_new(lex_ctx_t ctx);
168 void ast_block_delete(ast_block*);
170 MEM_VECTOR_PROTO(ast_block, ast_value*, locals);
171 MEM_VECTOR_PROTO(ast_block, ast_expression*, exprs);
173 bool ast_block_codegen(ast_block*, ast_function*, ir_value**);
177 * Contains a list of blocks... at least in theory.
178 * Usually there's just the main block, other blocks are inside that.
180 * Technically, functions don't need to be an AST node, since we have
181 * neither functions inside functions, nor lambdas, and function
182 * pointers could just work with a name. However, this way could be
183 * more flexible, and adds no real complexity.
185 struct ast_function_s
187 ast_node_common node;
192 MEM_VECTOR_MAKE(ast_block*, blocks);
194 ast_function* ast_function_new(lex_ctx_t ctx, const char *name, ast_value *vtype);
195 void ast_function_delete(ast_function*);
197 MEM_VECTOR_PROTO(ast_function, ast_block*, blocks);
199 bool ast_function_codegen(ast_function *self, ir_builder *builder);
203 union ast_expression_u
205 ast_expression_common expression;
215 ast_node_common node;
216 ast_expression expression;