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Add a while loop.

This commit is contained in:
Danila Fedorin 2018-08-10 19:16:47 -07:00
parent 0a21c7fdf7
commit 0824dee594
1 changed files with 38 additions and 17 deletions
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55
src/interpreter.c
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@ -1139,6 +1139,30 @@ libab_result _interpreter_create_function_value(
return result;
}
libab_result _interpreter_expect_boolean(struct interpreter_state* state,
libab_tree* tree, int* into,
libab_ref* scope,
libab_interpreter_scope_mode mode) {
libab_ref output;
libab_result result = _interpreter_run(state, tree, &output, scope, mode);
libab_value* value;
libab_parsetype* type;
if(result == LIBAB_SUCCESS) {
value = libab_ref_get(&output);
type = libab_ref_get(&value->type);
if(type->data_u.base != libab_get_basetype_bool(state->ab)) {
result = LIBAB_BAD_CALL;
}
if(result == LIBAB_SUCCESS) {
*into = *((int*) libab_ref_get(&value->data));
}
}
libab_ref_free(&output);
return result;
}
libab_result _interpreter_run(struct interpreter_state* state, libab_tree* tree,
libab_ref* into, libab_ref* scope,
libab_interpreter_scope_mode mode) {
@ -1215,29 +1239,26 @@ libab_result _interpreter_run(struct interpreter_state* state, libab_tree* tree,
} else if(tree->variant == TREE_FALSE) {
libab_get_false_value(state->ab, into);
} else if (tree->variant == TREE_IF) {
libab_ref condition;
libab_value* condition_value;
libab_parsetype* condition_type;
result = _interpreter_run(state, vec_index(&tree->children, 0),
&condition, scope, SCOPE_NORMAL);
int value;
result = _interpreter_expect_boolean(state,
vec_index(&tree->children, 0), &value, scope, SCOPE_NORMAL);
if(result == LIBAB_SUCCESS) {
condition_value = libab_ref_get(&condition);
condition_type = libab_ref_get(&condition_value->type);
if(condition_type->data_u.base != libab_get_basetype_bool(state->ab)) {
result = LIBAB_MISMATCHED_TYPE;
}
}
if(result == LIBAB_SUCCESS) {
int* boolean = libab_ref_get(&condition_value->data);
result = _interpreter_run(state, vec_index(&tree->children,
*boolean ? 1 : 2), into, scope, SCOPE_NORMAL);
value ? 1 : 2), into, scope, SCOPE_NORMAL);
} else {
libab_ref_null(into);
}
libab_ref_free(&condition);
} else if(tree->variant == TREE_WHILE) {
#define RUN_CHECK _interpreter_expect_boolean(state, \
vec_index(&tree->children, 0), &value, scope, SCOPE_NORMAL)
int value;
libab_get_unit_value(state->ab, into);
while(result == LIBAB_SUCCESS && (result = RUN_CHECK) == LIBAB_SUCCESS && value) {
libab_ref_free(into);
result = _interpreter_run(state, vec_index(&tree->children, 1),
into, scope, SCOPE_NORMAL);
}
} else {
libab_get_unit_value(state->ab, into);
}