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package server
import "core:fmt"
import "core:log"
import "core:odin/ast"
import "core:strconv"
// Attempts to resolve the type of the builtin proc by following the rules of the odin type checker
// defined in `check_builtin.cpp`.
// We don't need to worry about whether the inputs to the procs are valid which eliminates most edge cases.
// The basic rules are as follows:
// - For values not known at compile time (eg values return from procs), just return that type.
// The correct value will either be that type or a compiler error.
// - If all values are known at compile time, then we essentially compute the relevant value
// and return that type.
// There is a difference in the returned types between constants and variables. Constants will use an untyped
// value whereas variables will be typed.
check_builtin_proc_return_type :: proc(
ast_context: ^AstContext,
symbol: Symbol,
call: ^ast.Call_Expr,
is_mutable: bool,
) -> (
^ast.Expr,
bool,
) {
if symbol.pkg == "$builtin" {
switch symbol.name {
case "max", "min":
curr_candidate: ^ast.Basic_Lit
curr_value := 0.0
for arg, i in call.args {
if lit, value, ok := get_basic_lit_value(arg); ok {
if i != 0 {
if compare_basic_lit_value(value, curr_value, symbol.name) {
curr_candidate = lit
curr_value = value
}
} else {
curr_candidate = lit
curr_value = value
}
} else {
return get_return_expr(ast_context, arg, is_mutable), true
}
}
if curr_candidate != nil {
return convert_candidate(curr_candidate, is_mutable), true
}
case "abs":
for arg in call.args {
if lit, _, ok := get_basic_lit_value(arg); ok {
return convert_candidate(lit, is_mutable), true
}
return get_return_expr(ast_context, arg, is_mutable), true
}
case "clamp":
if len(call.args) == 3 {
value_lit, value_value, value_ok := get_basic_lit_value(call.args[0])
if !value_ok {
return get_return_expr(ast_context, call.args[0], is_mutable), true
}
minimum_lit, minimum_value, minimum_ok := get_basic_lit_value(call.args[1])
if !minimum_ok {
return get_return_expr(ast_context, call.args[1], is_mutable), true
}
maximum_lit, maximum_value, maximum_ok := get_basic_lit_value(call.args[2])
if !maximum_ok {
return get_return_expr(ast_context, call.args[2], is_mutable), true
}
if value_value < minimum_value {
return convert_candidate(minimum_lit, is_mutable), true
}
if value_value > maximum_value {
return convert_candidate(maximum_lit, is_mutable), true
}
return convert_candidate(value_lit, is_mutable), true
}
case "complex":
candidate: ^ast.Basic_Lit
for arg in call.args {
if lit, _, ok := get_basic_lit_value(arg); ok {
candidate = lit
} else {
expr := get_complex_return_expr(ast_context, arg)
if ident, ok := expr.derived.(^ast.Ident); ok {
switch ident.name {
case "f16":
ident.name = "complex32"
return ident, true
case "f32":
ident.name = "complex64"
return ident, true
case "f64":
ident.name = "complex128"
return ident, true
}
}
}
}
if candidate != nil {
return convert_complex_candidate(candidate, is_mutable), true
}
case "quaternion":
candidate: ^ast.Basic_Lit
for arg in call.args {
if lit, _, ok := get_basic_lit_value(arg); ok {
candidate = lit
} else {
expr := get_quaternion_return_expr(ast_context, arg)
if ident, ok := expr.derived.(^ast.Ident); ok {
switch ident.name {
case "f16":
ident.name = "quaternion64"
return ident, true
case "f32":
ident.name = "quaternion128"
return ident, true
case "f64":
ident.name = "quaternion256"
return ident, true
}
}
}
}
if candidate != nil {
return convert_quaternion_candidate(candidate, is_mutable), true
}
}
}
return nil, false
}
@(private = "file")
get_return_expr :: proc(ast_context: ^AstContext, expr: ^ast.Expr, is_mutable: bool) -> ^ast.Expr {
if v, ok := expr.derived.(^ast.Field_Value); ok {
return get_return_expr(ast_context, v.value, is_mutable)
}
if ident, ok := expr.derived.(^ast.Ident); ok {
symbol := Symbol{}
if ok := internal_resolve_type_expression(ast_context, ident, &symbol); ok {
if v, ok := symbol.value.(SymbolBasicValue); ok {
return v.ident
} else if v, ok := symbol.value.(SymbolUntypedValue); ok {
lit := ast.new(ast.Basic_Lit, expr.pos, expr.end)
lit.tok = v.tok
return convert_candidate(lit, is_mutable)
}
}
}
return expr
}
@(private = "file")
convert_candidate :: proc(candidate: ^ast.Basic_Lit, is_mutable: bool) -> ^ast.Expr {
if is_mutable {
ident := ast.new(ast.Ident, candidate.pos, candidate.end)
if candidate.tok.kind == .Integer {
ident.name = "int"
} else {
ident.name = "f64"
}
return ident
}
return candidate
}
@(private = "file")
get_complex_return_expr :: proc(ast_context: ^AstContext, expr: ^ast.Expr) -> ^ast.Expr {
if v, ok := expr.derived.(^ast.Field_Value); ok {
return get_complex_return_expr(ast_context, v.value)
}
if ident, ok := expr.derived.(^ast.Ident); ok {
symbol := Symbol{}
if ok := internal_resolve_type_expression(ast_context, ident, &symbol); ok {
if v, ok := symbol.value.(SymbolBasicValue); ok {
return v.ident
} else if v, ok := symbol.value.(SymbolUntypedValue); ok {
// There isn't a token for `Complex` so we just set it to `f64` instead
ident := ast.new(ast.Ident, expr.pos, expr.end)
ident.name = "f64"
return ident
}
}
}
return expr
}
@(private = "file")
convert_complex_candidate :: proc(candidate: ^ast.Basic_Lit, is_mutable: bool) -> ^ast.Expr {
if is_mutable {
ident := ast.new(ast.Ident, candidate.pos, candidate.end)
ident.name = "complex128"
return ident
}
return candidate
}
@(private = "file")
get_quaternion_return_expr :: proc(ast_context: ^AstContext, expr: ^ast.Expr) -> ^ast.Expr {
if v, ok := expr.derived.(^ast.Field_Value); ok {
return get_quaternion_return_expr(ast_context, v.value)
}
if ident, ok := expr.derived.(^ast.Ident); ok {
symbol := Symbol{}
if ok := internal_resolve_type_expression(ast_context, ident, &symbol); ok {
if v, ok := symbol.value.(SymbolBasicValue); ok {
return v.ident
} else if v, ok := symbol.value.(SymbolUntypedValue); ok {
// There isn't a token for `Quaternion` so we just set it to `quaternion256` instead
ident := ast.new(ast.Ident, expr.pos, expr.end)
ident.name = "f64"
return ident
}
}
}
return expr
}
@(private = "file")
convert_quaternion_candidate :: proc(candidate: ^ast.Basic_Lit, is_mutable: bool) -> ^ast.Expr {
if is_mutable {
ident := ast.new(ast.Ident, candidate.pos, candidate.end)
ident.name = "quaternion256"
return ident
}
return candidate
}
@(private = "file")
get_basic_lit_value :: proc(n: ^ast.Expr) -> (^ast.Basic_Lit, f64, bool) {
n := n
if v, ok := n.derived.(^ast.Field_Value); ok {
return get_basic_lit_value(v.value)
}
op := ""
if u, ok := n.derived.(^ast.Unary_Expr); ok {
op = u.op.text
n = u.expr
}
if lit, ok := n.derived.(^ast.Basic_Lit); ok {
text := lit.tok.text
if op != "" {
text = fmt.tprintf("%s%s", op, text)
}
value, ok := strconv.parse_f64(text)
if !ok {
return nil, 0, false
}
return lit, value, true
}
return nil, 0, false
}
@(private = "file")
compare_basic_lit_value :: proc(a, b: f64, name: string) -> bool {
if name == "max" {
return a > b
} else if name == "min" {
return a < b
}
return a > b
}
|
