diff options
Diffstat (limited to 'src/tparse/tree-value.go')
| -rw-r--r-- | src/tparse/tree-value.go | 49 |
1 files changed, 33 insertions, 16 deletions
diff --git a/src/tparse/tree-value.go b/src/tparse/tree-value.go index 554edcd..843ef0c 100644 --- a/src/tparse/tree-value.go +++ b/src/tparse/tree-value.go @@ -19,13 +19,17 @@ package tparse // Ops order in TNSL // Cast/Paren > Address > Get > Inc/Dec > Math > Bitwise > Logic -var UNARY = map[string]int { +var UNARY_PRE = map[string]int { "~": 0, - "`": 0, "++": 2, "--": 2, "!": 6, +} +var UNARY_POST = map[string]int { + "`": 0, + "++": 2, + "--": 2, } var ORDER = map[string]int{ @@ -88,31 +92,36 @@ var ORDER = map[string]int{ // Works? Please test. func parseUnaryOps(tokens *[]Token, tok, max int) (Node) { - out := Node{Data: Token{Type: 10, Data: "value"}, IsBlock: false} - val := false + var out Node + var vnode *Node = &out + val, comp := false, false // Pre-value op scan for ; tok < max && !val; tok++ { t := (*tokens)[tok] switch t.Type { case DELIMIT: - var tmp Node + switch t.Data { case "{", "(": // Array or struct evaluation, parenthetical value - tmp, tok = parseValueList(tokens, tok + 1, max) - out.Sub = append(out.Sub, tmp) + if vnode != &out { + errOut("Composite values may not use unary operators.", out.Data) + } + (*vnode), tok = parseValueList(tokens, tok + 1, max) val = true + comp = true default: errOut("Unexpected delimiter when parsing value", t) } case LITERAL, DEFWORD: - out.Sub = append(out.Sub, Node{Data: t, IsBlock: false}) + (*vnode).Data = t val = true case AUGMENT: - _, prs := UNARY[t.Data] + _, prs := UNARY_PRE[t.Data] if !prs { errOut("Parser bug! Operator failed to load into AST.", t) } else { - out.Sub = append(out.Sub, Node{Data: t, IsBlock: false}) + (*vnode) = Node{t, false, []Node{Node{}}} + vnode = &((*vnode).Sub[0]) } default: errOut("Unexpected token in value declaration", t) @@ -121,39 +130,47 @@ func parseUnaryOps(tokens *[]Token, tok, max int) (Node) { // Sanity check: make sure there's actually a value here if !val { - errOut("Expected to find value, but there wasn't one", (*tokens)[max]) + errOut("Expected to find value, but there wasn't one", (*tokens)[max - 1]) } // Post-value op scan for ; tok < max; tok++ { t := (*tokens)[tok] + var tmp Node switch t.Type { case DELIMIT: - var tmp Node switch t.Data { case "(": // Function call + if comp { + errOut("Composite values can not be called as functions.", t) + } tmp, tok = parseValueList(tokens, tok + 1, max) tmp.Data.Data = "call" case "[": // Typecasting tmp, tok = parseTypeList(tokens, tok + 1, max) tmp.Data.Data = "cast" case "{": // Array indexing + if comp { + errOut("Inline composite values can not be indexed.", t) + } tmp, tok = parseValueList(tokens, tok + 1, max) tmp.Data.Data = "index" default: errOut("Unexpected delimiter when parsing value", t) } - out.Sub = append(out.Sub, tmp) case AUGMENT: - _, prs := UNARY[t.Data] + _, prs := UNARY_POST[t.Data] if !prs { errOut("Parser bug! Operator failed to load into AST.", t) - } else { - out.Sub = append(out.Sub, Node{Data: t, IsBlock: false}) + }else if comp { + errOut("Composite values are not allowed to use unary operators.", t) } + tmp = Node{} + tmp.Data = t default: errOut("Unexpected token in value declaration", t) } + (*vnode).Sub = append((*vnode).Sub, tmp) } return out |